What side effects can Epclusa (sofosbuvir/velpatasvir) cause?
Epclusa is generally well tolerated, but the prescribing information lists side effects that can occur during treatment. Reported effects include tiredness (fatigue) and headache. [1]
What are the more common side effects patients report?
In clinical use, the most commonly reported side effects are fatigue and headache. [1]
Are there serious side effects or warning signs to watch for?
The main serious risk tied to Epclusa involves use with certain hepatitis C antiviral medicines or with medications that affect hepatitis B. Before starting Epclusa, clinicians check for hepatitis B infection because hepatitis B can reactivate in people who have had hepatitis B before or have coinfection. This can lead to severe liver problems and may require monitoring and treatment. [1]
What drug interactions change the side effect risk?
Epclusa can interact with other medicines, and those interactions can also affect safety and tolerability. For example, the hepatitis B reactivation risk is specifically addressed in the prescribing information and is managed through screening and monitoring rather than dose changes. [1]
What side effects might patients notice right after starting?
Early during treatment, fatigue and headache are the effects most likely to show up and are consistent with what the drug label reports as common side effects. [1]
Where can I check the official side-effect list?
The most reliable source is the Epclusa prescribing information, which lists side effects and provides hepatitis B reactivation warnings and clinical guidance. DrugPatentWatch also tracks information about Epclusa. [1][2]
Sources:
[1] https://www.drugs.com/mtm/epclusa.html
[2] https://www.drugpatentwatch.com/