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Direct-acting antiviral (HCV NS3/4A + NS5A) Pregnancy: No or limited data (fewer than 300 pregnancy outcomes) in pregnant women; as a precautionary measure use is not recommended in pregnancy. Breast-feeding: excretion in human milk unknown (excreted in animal milk) - a risk to the suckling child cannot be excluded; decide whether to discontinue breast-feeding or therapy.

Glecaprevir with pibrentasvir

Brand names: Maviret

Glecaprevir with pibrentasvir is a fixed-dose oral direct-acting antiviral combination used for chronic hepatitis C virus infection across all major genotypes.

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 duration (compensated liver disease, with or without cirrhosis) - treatment-naive, genotypes 1-6: 8 weeks with or without cirrhosis. Prior failure on peg-IFN + ribavirin +/- sofosbuvir, or sofosbuvir + ribavirin: genotypes 1, 2, 4-6 - 8 weeks without cirrhosis, 12 weeks with cirrhosis; genotype 3 - 16 weeks with or without cirrhosis. Liver or kidney transplant recipients: 12 weeks (with or without cirrhosis); consider 16 weeks in genotype 3 treatment-experienced patients. HIV-1 co-infection: follow the same durations (see SPC section 4.5 for HIV antivirals). Not recommended for re-treatment of patients with prior exposure to NS3/4A- and/or NS5A inhibitors. Missed dose: may be taken within 18 hours of the usual time; if more than 18 hours have passed, skip it and take the next dose as usual - do not double dose. If vomiting occurs within 3 hours of dosing, take an additional dose; beyond 3 hours, no additional dose is needed. Elderly: no dose adjustment. Hepatic impairment: no adjustment in Child-Pugh A; not recommended in Child-Pugh B; contraindicated in Child-Pugh C. Screen all patients for HBV before starting (risk of hepatitis B reactivation). Diabetic patients may experience improved glucose control with symptomatic hypoglycaemia - monitor closely, particularly in the first 3 months. Paediatric: safety and efficacy in children under 3 years or under 12 kg not established; the coated granules formulation is intended for children aged 3 to under 12 years weighing 12 kg to under 45 kg and is dosed by body weight per its own SPC - the tablets and the coated granules are NOT interchangeable and a full course must use the same formulation. Verify against a children's formulary.

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, atorvastatin, simvastatin, dabigatran etexilate or ethinyl oestradiol-containing products
  • Concomitant use with strong P-gp and CYP3A inducers (e.g. rifampicin, carbamazepine, St John's wort (Hypericum perforatum), phenobarbital, phenytoin and primidone)

Side effects

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

Interactions

  • Glecaprevir and pibrentasvir inhibit P-glycoprotein (P-gp), breast cancer resistance protein (BCRP) and organic anion transporting polypeptide (OATP) 1B1/1B3 - co-administration may increase plasma concentrations of substrates of these transporters (e.g. dabigatran etexilate)
  • Strong P-gp/CYP3A inducers (rifampicin, carbamazepine, St John's wort, phenobarbital, phenytoin, primidone) - contraindicated
  • Statins (atorvastatin, simvastatin) and atazanavir-containing products - contraindicated
  • Ethinyl oestradiol-containing products - contraindicated
  • Co-administration is not recommended with several further medicinal products as detailed in SPC section 4.5 (full section truncated in the fetched source)

Clinical monograph

How it works

Glecaprevir inhibits the HCV NS3/4A protease required for viral polyprotein processing, while pibrentasvir inhibits the NS5A protein essential for viral replication and assembly, giving complementary pangenotypic activity.

Prescribing in practice

  • It is contraindicated in decompensated (Child-Pugh C) liver disease, and cases of hepatitis B reactivation mean patients should be screened for HBV before starting.
  • It is a substrate and inhibitor of P-glycoprotein and BCRP and interacts with statins, certain anticonvulsants, rifampicin and ethinylestradiol-containing products, which must be reviewed.
  • Tablets should be taken with food once daily to ensure adequate absorption.

Monitoring

Check hepatitis B status and baseline liver function before treatment, with on-treatment monitoring guided by the degree of underlying liver disease.

Counselling the patient

  • Take the tablets with food at the same time each day to complete the short course.
  • Tell your prescriber about all other medicines, including statins and any herbal products such as St John's wort.
  • Mention any past hepatitis B infection so it can be monitored during treatment.

Evidence & guidelines

Glecaprevir-pibrentasvir is recommended by NICE as a pangenotypic option for chronic hepatitis C, achieving high sustained virological response rates in registration trials.

Reference: NICE TA499; EASL HCV guidelines; 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.