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Antiviral — Hepatitis C (Pan-Genotypic DAA) Pregnancy: Use is not recommended in pregnancy as a precautionary measure — there are no or limited data (fewer than 300 pregnancy outcomes) in pregnant women. Breast-feeding: it is unknown whether glecaprevir or pibrentasvir are excreted in human milk (both are excreted in animal milk); decide whether to discontinue breast-feeding or therapy.

Glecaprevir / Pibrentasvir

Brand names: Maviret

A fixed-dose combination of two direct-acting antivirals used as a pangenotypic, interferon-free oral regimen for the treatment of chronic hepatitis C infection.

Auto-extracted from the source labelling — not yet independently clinician-verified. These values were distilled from the UK SPC (or the US label where noted) but have not had a clinician sign-off. Confirm against the current SmPC before prescribing.

Adult dose

Dose: 300 mg/120 mg (three 100 mg/40 mg tablets)
Route: Oral — swallow tablets whole with food; do not chew, crush or break
Frequency: Once daily, at the same time each day, with food
Applies to adults, adolescents aged 12 years and older, or children weighing at least 45 kg. Treatment should be initiated and monitored by a physician experienced in the management of patients with HCV infection. Treatment durations (compensated liver disease, with or without cirrhosis): treatment-naive GT 1, 2, 3, 4, 5, 6 — 8 weeks with or without cirrhosis. Patients who failed prior peg-IFN + ribavirin +/- sofosbuvir, or sofosbuvir + ribavirin: GT 1, 2, 4-6 — 8 weeks (no cirrhosis) or 12 weeks (cirrhosis); GT 3 — 16 weeks. Liver or kidney transplant recipients with or without cirrhosis: 12 weeks; 16 weeks should be considered in genotype 3-infected, treatment-experienced patients. HIV-1 co-infection: follow the same duration tables. Not recommended for re-treatment of patients with prior exposure to NS3/4A- and/or NS5A inhibitors. Missed dose: the prescribed dose can be taken within 18 hours of the usual time; if more than 18 hours have passed, skip it and resume the usual schedule — do not double dose. If vomiting occurs within 3 hours of dosing, take an additional dose; if more than 3 hours after dosing, no additional dose is needed. Hepatic impairment: no adjustment in mild impairment (Child-Pugh A); not recommended in moderate impairment (Child-Pugh B); contraindicated in severe impairment (Child-Pugh C). Elderly: no dose adjustment required. Paediatric: safety and efficacy in children under 3 years or under 12 kg not established. A coated granules formulation is intended for children aged 3 to less than 12 years weighing 12 kg to less than 45 kg — refer to the SPC for the coated granules for body-weight-based dosing. Tablets and coated granules are NOT interchangeable and a full course must use the same formulation. Screen all patients for HBV before initiating (risk of HBV reactivation). Monitor glucose closely in diabetic patients, particularly in the first 3 months.

Dose adjustments

Renal

No dose adjustment is required in patients with any degree of renal impairment, including patients on dialysis.

Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.

Contraindications

  • Hypersensitivity to the active substances or to any of the excipients
  • Severe hepatic impairment (Child-Pugh C)
  • Concomitant use with atazanavir-containing products
  • Concomitant use with atorvastatin or simvastatin
  • Concomitant use with dabigatran etexilate
  • Concomitant use with ethinyl oestradiol-containing products
  • Concomitant use with strong P-gp and CYP3A inducers (e.g. rifampicin, carbamazepine, St John's wort, phenobarbital, phenytoin, primidone)

Side effects

  • Headache (very common)
  • Fatigue (very common)
  • Diarrhoea (common)
  • Nausea (common)
  • Asthenia (common)
  • Elevation in total bilirubin (common)
  • Angioedema (uncommon); pruritus (frequency not known)

Interactions

  • Glecaprevir and pibrentasvir are inhibitors of P-glycoprotein (P-gp), breast cancer resistance protein (BCRP) and organic anion transporting polypeptide (OATP) 1B1/3 — co-administration may increase plasma concentrations of substrates of these transporters (e.g. dabigatran)
  • Strong P-gp and CYP3A inducers (rifampicin, carbamazepine, St John's wort, phenobarbital, phenytoin, primidone) — contraindicated
  • Atazanavir-containing products — contraindicated; for other HIV antivirals refer to SPC section 4.5
  • Atorvastatin and simvastatin — contraindicated
  • Dabigatran etexilate — contraindicated
  • Ethinyl oestradiol-containing products — contraindicated
  • Co-administration is not recommended with several further medicinal products detailed in SPC section 4.5 (section truncated in the fetched source — check the full SPC)

Clinical monograph

How it works

Glecaprevir inhibits the HCV NS3/4A protease and pibrentasvir inhibits the NS5A protein, together blocking viral RNA replication and virion assembly across all major genotypes.

Prescribing in practice

  • Contraindicated in decompensated (Child-Pugh C) hepatic impairment and not recommended in Child-Pugh B, owing to a risk of hepatic decompensation and increased exposure.
  • Screen for hepatitis B before starting, as HBV reactivation has been reported during and after direct-acting antiviral therapy.
  • Numerous drug interactions occur, including with certain statins, ethinylestradiol-containing products and strong P-glycoprotein/CYP3A inducers, so review concomitant medicines against the SPC.

Monitoring

Assess hepatitis B status and baseline liver function before treatment, and monitor for HBV reactivation and confirm cure with a sustained virological response test after completing the course.

Counselling the patient

  • Take the tablets with food at the same time each day and do not miss doses, as adherence is important for cure.
  • Tell your team about all other medicines, including any bought over the counter or herbal remedies, before and during treatment.

Evidence & guidelines

Pangenotypic direct-acting antiviral regimens are recommended by NICE and have achieved high sustained virological response rates across hepatitis C genotypes in registration trials.

Reference: EASL Recommendations on Treatment of Hepatitis C 2022; MHRA SPC Maviret; Zeuzem et al. NEJM 2018 (ENDURANCE-1); Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).

Related

Curated clinical cross-links plus same-class fallbacks.