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Can Harvoni cause weight gain?

Medically reviewed by Carmen Pope, BPharm. Last updated on Sep 27, 2024.

Official answer

by Drugs.com

Harvoni is unlikely to cause weight gain. Weight gain has not been reported as a side effect of Harvoni in clinical trials. However, some individuals have reported weight gain with Harvoni on blog sites (from two to 12 pounds), although weight loss (up to 9 pounds) has been reported as well.

Weight loss is also a common symptom of hepatitis C. For many people, nausea associated with the virus makes it difficult to keep food down. Nausea also causes a loss of appetite, and together these symptoms can cause weight loss.

Once Harvoni treatment has started, symptoms disappear, and the person's appetite comes back and they feel well enough to eat properly again.

What are the side effects of Harvoni?

The most common Harvoni side effects are:

  • Fatigue, tiredness, lack of energy
  • Headache
  • Cough
  • Muscle pains
  • Shortness of breath
  • Irritability
  • Dizziness
  • Nausea
  • Insomnia
  • Diarrhea.

In addition, reactivation of hepatitis B has been reported in people who have a current or prior hepatitis B virus (HBV) infection before initiating treatment with Harvoni. In some cases, this has resulted in severe and rapid liver disease, hepatic failure, and death.

References

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  • Over 90% of people infected with hepatitis C who have not received treatment can be cured with 8 to 12 weeks of oral medications, but treatment for hepatitis B, if needed, may be long-term or lifelong.
  • There is no cure for hepatitis B, but once you recover from acute hepatitis B, you develop antibodies that protect you from the virus for life.
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