NOTE AIFA 2005



 


 

 

 

Nota 1

Gastroprotettori:

*       misoprostolo

*       esomeprazolo

*       lansoprazolo

*       omeprazolo

*       pantoprazolo

*       rabeprazolo

La prescrizione a carico del SSN è limitata ai pazienti a alto rischio:

 

*       per la prevenzione delle complicanze gravi del tratto gastrointestinale superiore:

*       in trattamento cronico con FANS non selettivi (non con COXIB);

*       in terapia antiaggregante con ASA a basse dosi.

 

Si considerano soggetti ad alto rischio i soggetti:

*       con storia di pregresse emorragie digestive o di ulcera peptica non guarita con terapia eradicante;

*       in concomitante terapia con anticoagulanti o cortisonici.

Non giustifica il ricorso alla gastroprotezione la sola presenza di uno o più dei seguenti fattori:

*       la terapia con ASA di soggetti non a rischio;

*       l’età > 65 anni;

*       la presenza di infezione da Helicobacter pylori (per la quale è indicato il trattamento eradicante).

 

Gli inibitori di pompa, fatte salve le indicazioni della nota 48, ed il misoprostolo non sono rimborsati quando prescritti in associazione con i COXIB.

 

Motivazioni e criteri applicativi

È noto come il trattamento cronico con i FANS possa determinare un aumentato rischio di ulcera peptica e delle sue complicanze gravi (emorragia, perforazione, ostruzione). Il rischio di ospedalizzazione per una complicanza grave è stimato fra l’1 e il 2% per anno, e aumenta fino a 4-5 volte nelle categorie a rischio sopra specificate; il rischio è particolarmente elevato se i FANS sono associati ad anticoagulanti (1).

Data la rilevanza clinica della tossicità gastroduodenale indotta dai FANS, numerosi sono stati gli studi che hanno valutato l’efficacia di una “gastroprotezione” utilizzando gli analoghi delle prostaglandine (misoprostolo) e gli anti secretivi (inibitori di pompa e H2 –antagonisti).

 

Misoprostolo

L’efficacia del misoprostolo nel ridurre l’incidenza delle complicanze gravi (emorragie, perforazioni e ostruzione pilorica) della gastropatia da FANS è stata dimostrata in uno studio (MUCOSA trial) di grandi dimensioni (8.853 pazienti) che ha documentato una riduzione del 40% di dette complicanze rispetto al placebo (2). Una metanalisi di 24 studi che ha valutato l’efficacia del misoprostolo non in base alla riduzione delle complicanze ma solo in base alla riduzione dell’incidenza di ulcere gastriche o duodenali diagnosticate endoscopicamente ha confermato detta efficacia (NNT = 8) per prevenire un’ulcera gastrica e (NNT = 30) per preveniore un’ulcera duodenale.

Il misoprostolo somministrato alla dose di 800 mg ha però una tollerabilità scarsa (dispepsia, dolore addominale, diarrea) e nel trial mucosa (2) i pazienti che sospendevano il trattamento per disturbi gastrointestinali erano più numerosi fra quelli trattati con misoprostolo più FANS (27,4%) che fra quelli trattati con FANS più placebo (20,1% p<0,001).

 

Inibitori della pompa protonica

Numerosi studi hanno dimostrato che nei soggetti trattati con FANS, dosi standard di inibitori della pompa protonica riducono significativamente l’incidenza di ulcere gastriche e duodenali diagnosticate all’endoscopia rispetto al placebo (3-6). Due di essi meritano particolare attenzione. Nel primo l’omeprazolo è stato confrontato con ranitidina (7) e, nel secondo, con misoprostolo (8) in due trial con uguale disegno sperimentale. In tutti e due gli studi (ASTRONAUT e OMNIUM trials) venivano studiati soggetti che a seguito della terapia con FANS presentavano una ulcera peptica o almeno 10 erosioni gastriche o duodenali. Ognuno dei due trial esaminava due fasi: a) la guarigione delle lesioni da FANS già presenti; e b) la prevenzione della ricomparsa delle lesioni durante ritrattamento con i FANS. In entrambe le fasi la terapia con l’omeprazolo si è dimostrata più efficace del farmaco di confronto (rispettivamente, ranitidina e misoprostolo) sia nel guarire le ulcere sia nel prevenire le recidive.

Detti risultati vanno però valutati con prudenza in quanto entrambi gli studi presentano limiti metodologici rilevanti quali: 1) la dimostrazione di maggiore efficacia è basata su parametri surrogati, infatti gli studi hanno utilizzato come “end-point” terapeutico la riduzione del numero di ulcere endoscopiche e dei sintomi dispeptici e non delle complicanze gravi che sono il parametro clinico più rilevante cui mira la profilassi farmacologica: non è cioè la stessa cosa prevenire un’ulcera visibile alla endoscopia routinaria in uno studio clinico e prevenire una complicanza grave (emorragia, perforazione, ostruzione); 2) le dosi utilizzate con i farmaci di riferimento (400 mg/d per il misoprostolo e 300 mg/d per la ranitidina) sono probabilmente inadeguate; infine, 3) è mancata soprattutto una attenta considerazione alla presenza o meno nei pazienti trattati di una infezione da H. pylori. Lo stato di portatore o meno di una tale infezione può, infatti, avere grande rilevanza. Una recente metanalisi condotta su 16 studi dimostra, infatti, in modo convincente come sia l’infezione da H. pylori sia l’impiego di FANS tradizionali possano aumentare il rischio di causare un’ulcera peptica o un sanguinamento gastrico in modo indipendente, avendo un effetto sinergico nell’aggravare il rischio di ulcera peptica e sanguinamento quando entrambi i fattori di rischio sono presenti nello stesso paziente (9).

La superiore efficacia dell’inibitore di pompa rispetto a misoprostolo e a dosi usuali di H2 bloccanti nel prevenire le ulcere da Fans potrebbe cioè essere in parte solo apparente e dovuta a una diversa distribuzione dei pazienti con infezione nella popolazione studiata (10-12).

L’importanza dell’infezione da H. pylori nella strategia di prevenzione del sanguinamento gastrico causato dai Fans tradizionali e dall’ASA a basso dosaggio è dimostrato da uno studio recente che ha rilevato come nei pazienti con infezione da H. pylori e una storia di sanguinamento gastrico, l’eradicazione dell’infezione da Helicobacter pylori risulti equivalente all’omeprazolo nel prevenire una recidiva del sanguinamento gastrico nei pazienti che assumono ASA a basse dosi (probabilità di recidiva del sanguinamento a sei mesi 1,9% con eradicazione e 0,9% con omeprazolo). Mentre nei pazienti che assumono naprossene al posto dell’ASA a basse dosi l’inibitore di pompa risulta più efficace della semplice eradicazione (probabilità di recidiva del sanguinamento a 6 mesi 18,8% con l’eradicazione e 4,4% con omeprazolo) (13).

Nei pazienti con storia di sanguinamento gastrico e che devono continuare una profilassi secondaria con ASA a basse dosi l’eradicazione dell’infezione probabilmente si pone perciò come la strategia profilattica più conveniente della somministrazione di un inibitore di pompa. Non è chiaro se l’eradicazione vada comunque eseguita in tutti i pazienti infetti che fanno uso cronico di FANS tradizionali.

Una metanalisi recente ha dimostrato che il rischio emorragico da ASA impiegato come antiaggregante è assai basso (una emorragia ogni 117 pazienti trattati con 50-162 mg/die di ASA per una durata media di 28 mesi) (14). Pertanto, una gastroprotezione farmacologica generalizzata non è giustificata. I trial considerati nella metanalisi escludevano però i pazienti ad alto rischio emorragico. In mancanza di dati relativi a questi pazienti, se si estrapola ad essi l’aumento di emorragie o ulcere da FANS nei soggetti a rischio (4-5 volte quello di base), la gastroprotezione nei soggetti a rischio emorragico trattati “long-term” con ASA potrebbe essere giustificata specie in presenza dei fattori di rischio più rilevanti (emorragia pregressa e pazienti in trattamento con anticoagulanti e cortisonici). Nei pazienti con infezione da Helicobacter pylori risulta indicata l’eradicazione (13). Non è invece appropriato l’uso di preparazioni “gastroprotette” o tamponate di ASA, che hanno un rischio emorragico non differente da quello dell’ASA standard (15).

Gli H2-inibitori non sono stati inclusi tra i farmaci indicati per la prevenzione e il trattamento del danno gastrointestinale da FANS perché in dosi standard non riducono significativamente l’incidenza delle ulcere gastriche (3), che sono le più frequenti fra quelle da FANS (16) anche se hanno efficacia pressochè uguale a quella del misoprostolo sulle ulcere duodenali. Una revisione non sistematica del danno gastrointestinale da FANS non raccomanda gli H2 – inibitori per la prevenzione dei danni gastrointestinali da FANS; li ammette per la terapia delle ulcere previa sospensione dei FANS, ma non se si seguitano i FANS (17). I dati clinici citati non possono essere applicati ai COXIB.

Va segnalato come in uno studio in pazienti con storia di sanguinamento gastrico recente, il trattamento per sei mesi con omeprazolo più diclofenac si sia dimostrato egualmente efficace rispetto al celecoxib nel prevenire la ricorrenza del sanguinamento gastrico (18).

Al momento non vi sono ulteriori dati sulla letteratura scientifica internazionale che documentino un’efficacia nella gastroprotezione con misoprostolo e/o inibitori della pompa protonica nei confronti del danno gastrointestinale da COXIB.

 

Bibliografia

 

1.        Lanza FL. A guideline for the treatment and prevention of NSAID-induced ulcers. Am J Gastroenterol 1998; 93: 2037-46.

2.        Silverstein, et al. Misorpostol reduces serious gastrointestinal complications in patients with rheumatoid arthritis receiving Nonsteroidal Anti-inflammatory gruds. A. randomised, double-blind, placebo-controlled trial. Ann Intern Med 1995; 123: 241-9.

3.        Koch M, et al. Prevention of Nonsteroidal Anti-inflammatory drugs-induced gastrointestinal mucosal injury. A meta-analysis of randomised controlled clinical trial. Arch Intern Med 1996; 156: 2321-32.

4.        Daneshmend TK, et al. Abolition by Omeprazole of Aspirin-induced gastric mucosal injury in man. Gut 1990; 31: 514-7.

5.        Cullen D, et al. Primary gastroduodenal prophylaxis with Omeprazolo for Nonsteroidal Anti-inflammatory Drug users. Aliment Pharmacol Ther 1998; 12: 135-140.

6.        Ekstrom P, et al. Prevention of peptic ulcer and dyspeptic symptoms with Omeprazolo in patients receiving Nonsteroidal Anti-inflammatory Drug continuous therapy. A nordic multicentre study. Scand J Gastroenterol 1996; 31: 753-8.

7.        Yeomans ND, et al. A comparison of Omeprazole with Ranitidine for ulcers associated with Nonsteroidal Anti-inflammatory Drugs. N Engl J Med 1998; 338:719-26.

8.        Hawkey CJ, et al. Omeprazole compared with Misoprostol for ulcers associated either Nonsteroidal Anti-inflammatory Drugs. N Engl J Med 1998; 338: 727-34.

9.        Jia-Qing, et al. Role of Helicobacter pylori infection and non-steroidal anti-inflammatory drugs in peptic ulcer disease : a meta-analysis. Lancet 2002; 359:14-22.

10.     Graham DY. Critical effect of Helicobacter pylori infection on the effectiveness of omeprazole for prevention of gastric or duodenal ulcers among chronic NSAID users. Helicobacter 2002; 7: 1-8.

11.     Graham DY, et al. Ulcer prevention in long-term users of Nonsteroidal Antinflammatory Drugs. Arch Intern Med 2002; 162: 169 – 175.

12.     Graham DY. NSAIDS, Helicobacter pylori and Pandora Box. N Engl. J. Med. 2002; 347: 2162-2164.

13.     Chan FKL, et al. Preventing recurrent upper gastrointestinal bleending in patients with Helicobacter pylori infection who are taking low-dose aspirin or naproxen. N Engl J Med 2001; 344: 967-973.

14.     Derry S, et al. Risk of gastrointestinal hemorrhage with long term use of aspirin: meta-analysis. BMJ 2000; 321: 1183-7.

15.     Kelly YP, et al. Risk of aspirin – associated major upper gastrointestinal bleending with enteric-coated or buffered products. Lancet 1996; 384: 1413-6.

16.     Feldman M. Peptic ulcer disease. In: Dale DC, Federman DD eds. Scientific American Medicine, Section 4, Gastroenterology II, 2000: 2-3.

17.     Wolfe MM, et al. Gastrointestinal toxicity of Non-steroidal Anti-inflammatoru Drugs. N Engl J Med 1999; 340: 1888-99.

18.     Chan FKL, et al. Celecoxib versus diclofenac and omeprazole in reducing the risk of recurrent ulcer bleeding in patients with arthritis. N Engl J Med 2002; 347: 2104-2110.

 

SPECIALITà MEDICINALI

 

   PRINCIPIO ATTIVO              ESOMEPRAZOLO                                                                    A02BC05

  FARMACO                                    CONFEZIONE                                                   AIC               DITTA

  AXAGON                                                              14 CPR GASTRORESISTENTI DA 40                                          35035563                SIMESA S.P.A.        

                                                                                     MG IN BLISTER AL/AL                                                                                                                                         

   AXAGON                                                              14 CPR GASTRORESISTENTI DA 20                                          35035157                SIMESA S.P.A.        

                                                                                     MG IN BLISTER AL/AL                                                                                                                                         

                                                                                                                                                                                                                                                      

   ESOPRAL                                                             14 CPR GASTRORESISTENTI IN                                                  35433022                BRACCO S.P.A.       

                                                                                     BLISTER DA 20 MG                                                                                                                                                

                                                                                                                                                                                                                                                                              

   ESOPRAL                                                             14 CPR GASTRORESISTENTI IN                                                  35433174                BRACCO S.P.A.       

                                                                                     BLISTER DA 40 MG                                                                                                                                                

                                                                                                                                                                                                                                                                              

   LUCEN                                                                  14 CPR RIVESTITE CON FILM IN                                                35367263                ISTITUTO

                                                                                     BLISTER DA 20 MG                                                                                                              FARMACOBIOLOGIC

                                                                                                                                                                                                                                            O MALESCI S.P.A.   

   LUCEN                                                                  14 CPR RIVESTITE CON FILM IN                                                35367414                ISTITUTO

                                                                                     BLISTER DA 40 MG                                                                                                              FARMACOBIOLOGIC

                                                                                                                                                                                                                                            O MALESCI S.P.A.   

   NEXIUM                                                                14 CPR RIVESTITE CON FILM IN                                                34972265                ASTRAZENECA

                                                                                     BLISTER DA 20 MG                                                                                                              S.P.A.                       

   NEXIUM                                                                14 CPR RIVESTITE CON FILM IN                                                34972416                ASTRAZENECA

                                                                                     BLISTER DA 40 MG                                                                                                              S.P.A.                       

   PRINCIPIO ATTIVO              LANSOPRAZOLO *                                                                  A02BC03

  FARMACO                                    CONFEZIONE                                                   AIC               DITTA

   LANSOX                                                               " 15 MG COMPRESSE                                                                       28600070                TAKEDA ITALIA

                                                                                     ORODISPERSIBILI " 14 COMPRESSE                                                                           FARMACEUTICI

                                                                                                                                                                                                                                            S.P.A.                       

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                                                                                                                                                                                                                                            FARMACEUTICI

                                                                                                                                                                                                                                            S.P.A.                       

   LANSOX                                                               " 30 MG COMPRESSE                                                                       28600094                TAKEDA ITALIA

                                                                                     ORODISPERSIBILI " 14 COMPRESSE                                                                           FARMACEUTICI

                                                                                                                                                                                                                                            S.P.A.                       

   LANSOX                                                               "15 MG CAPSULE RIGIDE" 14 CAPSULE                               28600029                TAKEDA ITALIA

                                                                                                                                                                                                                                            FARMACEUTICI

                                                                                                                                                                                                                                            S.P.A.                       

   LIMPIDEX                                                            " 15 MG COMPRESSE                                                                       28755078                SIGMA-TAU

                                                                                     ORODISPERSIBILI " 14 COMPRESSE                                                                           INDUSTRIE

                                                                                                                                                                                                                                            FARMACEUTICHE

                                                                                                                                                                                                                                                                   RIUNITE SPA          

   LIMPIDEX                                                            " 30 MG COMPRESSE                                                                       28755092                SIGMA-TAU

                                                                                     ORODISPERSIBILI " 14 COMPRESSE                                                                           INDUSTRIE

                                                                                                                                                                                                                                            FARMACEUTICHE

                                                                                                                                                                                                                                            RIUNITE SPA          

   LIMPIDEX                                                            "15 MG CAPSULE RIGIDE" 14 CAPSULE                               28755027                SIGMA-TAU

                                                                                                                                                                                                                                            INDUSTRIE

                                                                                                                                                                                                                                            FARMACEUTICHE

                                                                                                                                                                                                                                            RIUNITE SPA          

   LIMPIDEX                                                            "30 MG CAPSULE RIGIDE" 14 CAPSULE                               28755015                SIGMA-TAU

                                                                                                                                                                                                                                            INDUSTRIE

                                                                                                                                                                                                                                            FARMACEUTICHE

                                                                                                                                                                                                                                            RIUNITE SPA          

   ZOTON                                                                   " 15 MG COMPRESSE                                                                       28775070                WYETH LEDERLE

                                                                                     ORODISPERSIBILI " 14 COMPRESSE                                                                           S.P.A.                       

   ZOTON                                                                   "30 MG CAPSULE" 14 CAPSULE                                                28775017                WYETH LEDERLE

                                                                                                                                                                                                                                            S.P.A.                       

   ZOTON                                                                   "15 MG CAPSULE" 14 CAPSULE                                                28775029                WYETH LEDERLE

                                                                                                                                                                                                                                            S.P.A.                       

   ZOTON                                                                   " 30 MG COMPRESSE                                                                       28775094                WYETH LEDERLE

                                                                                     ORODISPERSIBILI " 14 COMPRESSE                                                                           S.P.A.                       

   PRINCIPIO ATTIVO              MISOPROSTOLO                                                                     A02BB01

  FARMACO                                    CONFEZIONE                                                   AIC               DITTA

   CYTOTEC                                                             "200 MCG COMPRESSE"50                                                            26488015                CONTINENTAL

                                                                                     COMPRESSE                                                                                                                            PHARMA INC           

                                                                                                                                                                                                                                                                              

   MISODEX                                                             "200 MCG COMPRESSE" 50                                                           27307014                MONSANTO

                                                                                     COMPRESSE                                                                                                                            HOLDING GMBH       

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                                                                                     MODIFICATO" 14 CAPSULE                                                                                            S.P.A.                       

   ANTRA                                                                  "20 MG CAPSULE A RILASCIO                                                   28245090                ASTRAZENECA

                                                                                     MODIFICATO" 14 CAPSULE                                                                                            S.P.A.                       

   LOSEC                                                                   "20 MG CAPSULE RIGIDE A  RILASCIO                                 26804106                ASTRAZENECA AB

                                                                                     MODIFICATO" 14 CAPSULE                                                                                                                              

   LOSEC                                                                   "10 MG CAPSULE A RILASCIO                                                   26804082                ASTRAZENECA AB

                                                                                     MODIFICATO" 14 CAPSULE                                                                                                                              

   MEPRAL                                                               "10 MG CAPSULE RIGIDE A RILASCIO                                  26783086                BRACCO S.P.A.       

                                                                                     MODIFICATO" 14 CAPSULE                                                                                                                              

   MEPRAL                                                               "20 MG CAPSULE RIGIDE A RILASCIO                                  26783098                BRACCO S.P.A.       

                                                                                     MODIFICATO" 14 CAPSULE                                                                                                                              

   OMEPRAZEN                                                     "10 MG CAPSULE RIGIDE A RILASCIO                                  26803080                ISTITUTO

                                                                                     MODIFICATO" 14 CAPSULE                                                                                            FARMACOBIOLOGIC

                                                                                                                                                                                                                                            O MALESCI S.P.A.   

   OMEPRAZEN                                                     "20 MG CAPSULE RIGIDE A RILASCIO                                  26803104                ISTITUTO

                                                                                     MODIFICATO" 14 CAPSULE                                                                                            FARMACOBIOLOGIC

                                                                                                                                                                                                                                            O MALESCI S.P.A.   

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  FARMACO                                    CONFEZIONE                                                   AIC               DITTA

  PANTECTA                                                          14 COMPRESSE GASTRORESISTENTI                                     31834094                ABBOTT S.P.A.       

                                                                                     20 MG IN FLACONE                                                                                                                                               

   PANTOPAN                                                        14 COMPRESSE GASTRORESISTENTI                                     31835097                PHARMACIA ITALIA

                                                                                     20 MG IN FLACONE                                                                                                             S.P.A.                       

   PANTORC                                                            14 CPR GASTRORESISTENTI 20 MG                                         31981119                ALTANA PHARMA

                                                                                     FLACONE                                                                                                                                 SPA                          

   PEPTAZOL                                                          14 COMPRESSE GASTRORESISTENTI                                     31111091                RECORDATI

                                                                                     20 MG IN FLACONE                                                                                                             INDUSTRIA

                                                                                                                                                                                                                                            CHIMICA

                                                                                                                                                                                                                                            FARMACEUTICA S.P.A.

 

 

PANTECTA

14 COMPRESSE GASTRORESISTENTI 20 MG IN BLISTER

031834029

ABBOTT SpA

PANTECTA

14 COMPRESSE GASTRORESISTENTI IN BLISTER AL/AL DA 40 MG

031834296

ABBOTT SpA

PANTOPAN

14 COMPRESSE GASTRORESISTENTI 20 MG IN BLISTER

031835022

PHARMACIA ITALIA SpA

PANTOPAN

14 COMPRESSE DA 40 MG IN BLISTER AL/AL

031835287

PHARMACIA ITALIA SpA

PANTORC

14 CPR GASTRORESISTENTI 20 MG BLISTER

031981044

ALTANA PHARMA SpA

 

PANTORC

 

 

14 COMPRESSE GASTRORESISTETI DA 40 MG IN BLISTER AL/AL

 

 

031981311

 

 

ALTANA PHARMA SpA

PEPTAZOL

14 COMPRESSE GASTRORESISTENTI 20 MG IN BLISTER

031111026

RECORDATI SpA

PEPTAZOL

14 COMPRESSE GASTRORESISTENTI DA 40 MG IN BLISTER AL/AL

031111293

RECORDATI SpA

   PRINCIPIO ATTIVO              RABEPRAZOLO *                                                                     A02BC 

  FARMACO                                    CONFEZIONE                                                   AIC               DITTA

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                                                                                     GASTRORESISTENTI 10 MG                                                                                             S.P.A.                       

   PARIET                                                                  1 BLISTER AL/AL 14 CPR                                                              34216186                JANSSEN CILAG

                                                                                     GASTRORESISTENTI 20 MG                                                                                             S.P.A.                       


Nota 2

 

Acidi biliari:

*       chenourso-desossicolico

*       taurourso-desossicolico

*       urso-desossicolico

 

La prescrizione nelle epatopatie croniche colestatiche a carico del SSN è limitata ai pazienti affetti da:

 

*       cirrosi biliare primitiva;

*       colangite sclerosante primitiva;

*       colestasi associata alla fibrosi cistica o intraepatica familiare;

*       calcolosi colesterinica.

 

La prescrizione di acidi biliari non è rimborsata dal SSN per il trattamento della semplice dispepsia.

Il trattamento con acidi biliari non è rimborsato nei pazienti con epatite cronica virale ed in quelli con coliche ravvicinate o gravi per i quali è indicata la colecistectomia.

 

 

Motivazioni e criteri applicativi

Le prime tre indicazioni si riferiscono a epatopatie croniche nelle quali modificazioni quali‑quantitative della funzione biligenetica hanno un ruolo patogenetico molto importante, determinando alterazioni anatomiche e funzionali del fegato (epatopatie colestatiche). L’impiego degli acidi urso- e taurourso‑desossicolico nelle epatopatie croniche colestatiche è limitato a quelle per le quali si trovano in letteratura evidenze di efficacia terapeutica in termini di miglioramenti anatomici, clinici e di sopravvivenza significativi o, nel caso di malattie prive di altre terapie utili, anche marginali. Tali evidenze, non univoche (1) ma nettamente prevalenti (2-5) per la cirrosi biliare primitiva (l’acido ursodesossicolico è stato recentemente approvato per la terapia di questa malattia dalla Food and Drug Administration), sono meno chiare ma non inesistenti per le altre epatopatie colestatiche in nota (5-7). Le sperimentazioni controllate e randomizzate hanno invece dimostrato che l’acido ursodesossicolico non è efficace nelle epatiti croniche virali, nelle quali non favorisce l’eliminazione dell’RNA del virus C e non migliora le lesioni istologiche (5,8-10).

La calcolosi colesterinica potenzialmente trattabile con acidi biliari è caratterizzata da calcoli singoli o multipli (diametro uguale o inferiore a 1 cm), radiotrasparenti, con colecisti funzionante, pazienti non obesi con sintomatologia modesta (coliche non molto frequenti o severe). Altra indicazione è la presenza in colecisti di frammenti di calcoli post-litotripsia.

Nella colelitiasi, la terapia con sali biliari ottiene la dissoluzione dei calcoli solo in una parte dei pazienti, variabile in relazione a fattori diversi (dimensioni dei calcoli, funzionalità della colecisti, ecc.); è seguita frequentemente dalla formazione di nuovi calcoli (50-60% a 5 anni) (11); non trova indicazione nei pazienti con coliche ravvicinate o severe, per i quali è necessaria la colecistectomia. Bisogna anche considerare che l’alternativa chirurgica, laparoscopica o con minilaparotomia, è risolutiva e a basso rischio. Si ritiene opportuno limitare l’uso dei sali biliari ai pazienti con caratteristiche definite “ottimali” per la dissoluzione dei calcoli, che raggiunge in questi casi percentuali fra il 48% e il 60% (12). Le caratteristiche sopra ricordate sono presenti in circa il 15% dei pazienti (11).

 

Bibliografia

1. Goulis J, et al. Randomised controlled trial of ursodeoxycholic acid therapy in primary biliary cirrhosis: a meta-analysis. Lancet 1999;354:1053-60.

2. Poupon R, et al. Combined analysis of randomized controlled trial of Ursodeoxycholic acid in primary biliary cirrhosis. Gastroenterology 1997;113:884-90.

3. Combes B, et al. The effect of ursodeoxycholic acid on the florid duct lesion of primary biliary cirrhosis. Hepatology 1999;30:602-5.

4. Lindor KD, Dickson ER. Management of primary biliary cirrhosis. In: Schiff’s diseases of the liver. 8th ed. Lippincott Williamds et Wilkins, 1999: Ch. 25.

5 .Beuers U, et al. Ursodeoxycholic acid in cholestasis: potential mechanisms of action and therapeutic applications. Hepatology 1998;28:1449-53.

6. Lindor KD, et al. Ursodiol for primary sclerosing cholangitis. N Engl J Med 1997;336:691-5.

7. Colombo C, et al. Ursodeoxycholic acid for liver disease associated with cystic fibrosis : a double-blind, multicenter trial. Hepatology 1996;23:1484-90.

8. Boucher E, et al. Interferon and ursodeoxycholic acid combined therapy in the treatment of chronic viral C hepatitis: results from a controlled clinical trial in 8 patients. Hepatology 1995;21:322-7.

9. Angelico M, et al. Recombinant interferon-alpha and ursodeoxycholic acid versus interferon alpha alone in the treatment of chronic hepatitis C: a randomized clinical trial with long-term follow up. Am J Gastroenterol 1995;90:263-9.

10. Bellentani S, et al. Ursodiol in the long-term treatment of chronic hepatitis: a double-blind multicenter trial. J Hepatol 1993;19:459-64.

11. Strasberg SM, et al. Cholecystolithiasis: lithotherapy for the 90s. Hepatology 1992;16:820-39.

12. May GR, et al. Efficacy of bile acid therapy for gallstone dissolution: a meta-analysis of randomized trial. Aliment Pharmacol Ther 1993;7:139-48.

 

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                                                                                                                                                                                                                                            FARMACEUTICI

                                                                                                                                                                                                                                            S.P.A.                       

   URSOLISIN                                                          20 CAPSULE 150 MG                                                                       25430063                MAGIS

                                                                                                                                                                                                                                            FARMACEUTICI

                                                                                                                                                                                                                                            S.P.A.                       

 


Nota 5

Enzimi pancreatici:

*       pancrelipasi

La prescrizione a carico del SSN è consentita nei pazienti in una delle seguenti condizioni comportanti maldigestione e malassorbimento di grassi e proteine:

 

*       insufficienza pancreatica esocrina conseguente a pancreatite cronica;

*       pancreasectomia;

*       neoplasie del pancreas;

*       fibrosi cistica.

 

La prescrizione di enzimi pancreatici non è rimborsata dal SSN per il trattamento della semplice dispepsia.

 

Motivazioni e criteri applicativi

La supplementazione orale con enzimi pancreatici si rende necessaria per compensare la ridotta o assente secrezione causata da varie malattie del pancreas con maldigestione e malassorbimento di grassi e proteine.

L’acidità gastrica ed il calore possono inattivare le preparazioni contenenti enzimi pancreatici, che dovrebbero essere assunti durante i pasti e con bevande non calde. Attualmente le preparazioni disponibili sono “gastroprotette” per cui non serve associare alla supplementazione di enzimi pancreatici anche inibitori della secrezione acida gastrica o antiacidi.

La posologia è regolata sulla base del numero di scariche alvine, la consistenza e la quantità delle feci riferite dal paziente che assume la terapia sostitutiva con gli enzimi pancreatici.

Gli enzimi pancreatici possono provocare irritazione perianale, se assunti in dosaggio eccessivo e periorale e se trattenuti in cavità orale. Possono anche causare nausea, vomito, gonfiore addominale e, raramente, iperuricemia ed iperuricosuria.

 

SPECIALITà MEDICINALI

 

PRINCIPIO ATTIVO                 PANCRELIPASI *                                                                     A09AA02

FARMACO                                      CONFEZIONE                                                   AIC               DITTA

CREON                                                                     "150 MG CAPSULE RIGIDE A RILASCIO                                29018064                SOLVAY

                                                                                     MODIFICATO" 100 CAPSULE                                                                                          PHARMACEUTICAL

                                                                                                                                                                                                                                            S GMBH

PANCREX                                                               "CAPSULE RIGIDE CONTENENTI                                             21232071                MIPHARM S.P.A.

MICROGRANULI GASTRORESISTENTI"

100 CAPSULE


Nota 8

*       levocarnitina

La prescrizione a carico del SSN, su diagnosi e piano terapeutico di strutture specialistiche delle Aziende Sanitarie, è limitata alle seguenti condizioni:

 

*       carenza primaria di carnitina;

*       carenza di carnitina secondaria a trattamento dialitico.

 

La prescrizione di levocarnitina non è rimborsata dal SSN per altre indicazioni autorizzate.

 

Motivazioni e criteri applicativi

La carnitina è un costituente essenziale dell’organismo e svolge un ruolo di rilievo nel metabolismo energetico a livello mitocondriale; il SSN garantisce pertanto la gratuità dell’erogazione per coloro che hanno carenza primaria di carnitina, evidenziata mediante dosaggio della carnitina nel plasma o in biopsie muscolari. I valori normali di carnitina nel plasma sono di circa 25 mmol/L nell’infanzia e di 54 mmol/L nell’età adulta (1); nella pratica clinica viene posta diagnosi di carenza primaria per livelli ematici inferiori a 2 mmol/L o per concentrazioni tissutali minori del 10-20% rispetto ai valori normali (2,3).

Una carenza secondaria può verificarsi durante trattamento dialitico. Sono state pubblicate 3 ricerche (4‑6) (anche se condotte su un numero limitato di pazienti), in cui è stata dimostrata la possibilità di ridurre la posologia dell’eritropoietina in circa il 50% dei casi trattati con 1 grammo di levocarnitina per via endovenosa a fine dialisi. La levocarnitina può pertanto essere usata in regime ospedaliero anche domiciliare, quando sia stato ottimizzato l’apporto di ferro, per ridurre la posologia dell’eritropoietina e per migliorare l’insufficiente risposta alla terapia con eritropoietina che si verifica in alcuni pazienti. Il trattamento con levocarnitina dovrebbe essere sospeso se, dopo 4 mesi di terapia, non sia stato possibile dimostrare una riduzione della posologia dell’eritropoietina.

 

Bibliografia

1. Bremer J. The role of carnitine in intracellular metabolism. J Clin Chem Clin Biochem 1990;28:297-301.

2. Pons R, et al. Primary and secondary carnitine deficency syndromes. J Clin Neurol 1995;10(Suppl 2):S8-21.

3. Famularo G, et al. Carnitine deficency: primary and secondary syndromes. In: De Simone C, Famularo G, eds. Carnitine today. Hidelberg: Springer-Verlag, 1997:119-61.

4. Kletzmayr J, et al. Anemia and carnitine supplementation in hemodialyzed patients. Kid Intern 1999;55 (Suppl 9):S93-106.

5. Labonia WD, et al. L-Carnitine effects on anemia in hemodialyzed patients treated with erythropoietin. Am J Kidney Dis 1995;26:757-64.

6. Caruso U, et al. Effects of L-Carnitine on anemia in aged hemodialysis patients treated with recombinant human erythropoietin: a pilot study. Dial Transplant 1999;27:498-506.

 

 

 

   PRINCIPIO ATTIVO              LEVOCARNITINA *                                                                 A16AA01

  FARMACO                                    CONFEZIONE                                                   AIC               DITTA

   CARNITENE                                                        "2 G/10 ML SOLUZIONE ORALE" 10                                         18610079                SIGMA-TAU

                                                                                     CONTENITORI MONODOSE                                                                                            INDUSTRIE

                                                                                                                                                                                                                                            FARMACEUTICHE

                                                                                                                                                                                                                                            RIUNITE SPA           

   MIOTONAL                                                         "2 G SOLUZIONE ORALE" 10                                                       26322040                FARMACEUTICI

                                                                                     CONTENITORI MONODOSE DA 10 ML                                                                      CABER S.P.A.         

                                                                                                                                                                                                

 


                                                  Nota 9

Antiaggreganti:

*       ticlopidina

 

La prescrizione a carico del SSN è limitata alle seguenti condizioni:

 

*       in associazione all’ASA a basse dosi, in pazienti sottoposti ad angioplastica coronarica con impianto di stent, per il mese successivo all’intervento;

*       in alternativa all’ASA, in pazienti che non possano assumere ASA per pregresse manifestazioni da ipersensibilità, recidiva di eventi ischemici cerebrali durante terapia con ASA o ulcera gastroduodenale;

*       nel trattamento della trombosi della vena centrale della retina.

 

Nei casi che non rispondono alle condizioni sopra citate la terapia di scelta è quella con ASA a basse dosi.

 

 

Motivazioni e criteri applicativi

È stato dimostrato che l’associazione tra ticlopidina e ASA è più efficace della sola aspirina o della terapia anticoagulante orale nel prevenire la ristenosi delle angioplastiche coronariche a cui è stato applicato uno stent (1,2).

La ticlopidina esercita un’azione antiaggregante (con meccanismo differente da quello dell’ASA) che si manifesta nella riduzione di eventi ischemici in gruppi di pazienti affetti da patologia vascolare in vari distretti arteriosi. Dal momento che la documentazione scientifica a favore dell’ASA continua ad essere preponderante (3, 4) rispetto a quella della ticlopidina e che, alla luce delle indicazioni proposte nelle principali linee- guida internazionali (5, 8), il rapporto costo-beneficio è decisamente a favore dell’ASA, è preferibile prescrivere l’ASA a basse dosi a tutti i pazienti per i quali è indicato un trattamento antiaggregante, riservando la ticlopidina per coloro che non possono assumere l’ASA per vari motivi.

Prima che la ticlopidina fosse disponibile, la trombosi subacuta di stent, spesso provocando eventi cardiaci maggiori, era riportata in 3,5-8,6% dei pazienti. In pazienti ad alto rischio con impianto di stent Palmaz-Schatz, il trattamento con ticlopidina+aspirina ha ridotto gli end-point cardiaci primari (end-point composto di morte cardiaca, infarto miocardiaco, bypass coronario e angioplastica ripetuta) dal 6,2% (terapia anticoagulante standard) all’1,6% (9). L’occlusione degli stent si verifica nel 5,4% nel gruppo ricevente terapia anticoagulante e nello 0,8% del gruppo ricevente terapia antiaggregante.

Gli effetti favorevoli della ticlopidina erano confermati dallo studio STARS (Stent Antithrombotic Regimen Study), che ha confrontato l’effetto dell’aspirina (325 mg al dì), la combinazione di aspirina (325 mg al dì) più ticlopidina (500 mg al dì per un mese), e di aspirina (325 mg al dì) più warfarin sugli eventi ischemici precoci. Solo lo 0,5% dei pazienti assegnati alla terapia aspirina+ticlopidina raggiungeva l’end-point composito primario a 30 giorni di morte, trombosi angiografica, rivascolarizzazione della lesione trattata, o infarto miocardio rispetto a 3,6% dei pazienti assegnati alla sola aspirina e il 2,7% dei pazienti assegnati a aspirina+warfarin. I risultati dello studio suggeriscono che il pretrattamento di 24 ore con ticlopidina permette una più efficace inibizione dell’attivazione piastrinica rispetto alla più breve durata di trattamento (10). Una grave leucopenia, spesso reversibile all’interruzione del trattamento, è la complicanza principale (circa dell’1% dei pazienti) del trattamento con ticlopidina (11). Si può verificare anche la porpora trombotica trombocitopenica (11).

Il rischio di alterazioni ematologiche anche gravi, leucopenia e/o piastrinopenia rende indispensabile nei pazienti trattati con ticlopidina un monitoraggio periodico dell’emocromo citometrico.

 

Bibliografia

1.                  Shoming A, et al. A randomized comparison of antiplatelet and anticoagulant therapy after placement of coronary artery stents. N Engl J Med 1996;334:1084-9

2.                  Martin BL, et al. A clinical trial comparing three antithrombotic drug regimens after coronary artery stenting. N Engl J Med 1998;339:1665-71.

3.