Simeprevir

Oral
Chronic hepatitis C

Moderate or severe (Child-Pugh class B or C): Not recommended.

Hypersensitivity. Concomitant use with CYP3A4 inducers or inhibitors.

Patient with hepatitis B virus (HBV) infection, decompensated cirrhosis. Moderate to severe hepatic impairment. Not intended for use as monotherapy. Pregnancy and lactation.

Significant: Photosensitivity, rash, pruritus.
Blood and lymphatic system disorders: Hyperbilirubinaemia.
Gastrointestinal disorders: Nausea, diarrhoea, constipation.
General disorders and administration site conditions: Fatigue.
Musculoskeletal and connective tissue disorders: Myalgia.
Nervous system disorders: Headache, dizziness.
Psychiatric disorders: Insomnia.
Respiratory, thoracic and mediastinal disorders: Dyspnoea.
Potentially Fatal: Hepatitis B virus reactivation, resulting in fulminant hepatitis or hepatic failure (in patients with HBV co-infection); hepatic decompensation and hepatic failure, symptomatic bradycardia.

May impair ability to drive or operate machinery.

Monitor CBC, INR, LFT, serum creatinine, HCV-RNA at baseline and during therapy. Obtain hepatitis B surface antigen (HbsAg) and hepatitis B core antibody (anti-HBc) prior to initiation of therapy to test for evidence of current or prior HBV infection. Perform pregnancy test and ensure proper use of birth control prior to therapy.

Increased plasma concentration with antiarrhythmic agents (e.g. disopyramide, flecainide, mexiletine). Increased anticoagulant effect of warfarin.
Potentially Fatal: Decreased plasma concentration and therapeutic effect with moderate or strong CYP3A4 inducers (e.g. carbamazepine, phenobarbital, phenytoin, rifampicin). Increased plasma levels with moderate or potent CYP3A4 inhibitors (e.g. ketoconazole). May increase the concentrations of P-glycoprotein substrates (e.g. doxorubicin), organic anion transport polypeptides, ciclosporin. May cause symptomatic bradycardia when given with amiodarone.

Increased absorption with food. Decreased serum concentration with St John’s wort. Increased serum concentration with milk thistle.

Description:
Mechanism of Action: Simeprevir is a hepatitis C virus (HCV) nonstructural protein 3/4A (NS3/4A) serine protease inhibitor. It binds to the NS3/4A protease active site, thereby inhibiting viral replication activity.
Pharmacokinetics:
Absorption: Increased absorption with food. Bioavailability: 62%. Time to peak plasma concentration: 4-6 hr.
Distribution: Plasma protein binding: >99.9%, to albumin and α₁-acid glycoprotein.
Metabolism: Undergoes oxidative metabolism in the liver mainly by CYP3A4 enzyme, to unchanged drug and metabolites.
Excretion: Mainly via faeces (approx 91%); urine (<1%). Terminal elimination half-life: 41 hours.

Source: National Center for Biotechnology Information. PubChem Database. Simeprevir, CID=24873435, https://pubchem.ncbi.nlm.nih.gov/compound/Simeprevir (accessed on Jan. 23, 2020)

Store below 30°C. Protect from light.
Any unused portions should be disposed of in accordance with local requirements.

Thuốc kháng virus

J05AP05 - simeprevir ; Belongs to the class of antivirals for treatment of HCV infections. Used in the treatment of hepatitis C viral infections.

Anon. Simeprevir. Lexicomp Online. Hudson, Ohio. Wolters Kluwer Clinical Drug Information, Inc. https://online.lexi.com. Accessed 01/02/2018.

Buckingham R (ed). Simeprevir. Martindale: The Complete Drug Reference [online]. London. Pharmaceutical Press. https://www.medicinescomplete.com. Accessed 01/02/2018.

Joint Formulary Committee. Simeprevir. British National Formulary [online]. London. BMJ Group and Pharmaceutical Press. https://www.medicinescomplete.com. Accessed 01/02/2018.

McEvoy GK, Snow EK, Miller J et al (eds). Simeprevir Sodium. AHFS Drug Information (AHFS DI) [online]. American Society of Health-System Pharmacists (ASHP). https://www.medicinescomplete.com. Accessed 01/02/2018.

Olysio Capsule (Janssen Products LP). DailyMed. Source: U.S. National Library of Medicine. https://dailymed.nlm.nih.gov/dailymed/. Accessed 01/02/2018.