Get emergency medical help if you have signs of an allergic reaction to Harvoni: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have new or worsening symptoms such as:
right-sided upper stomach pain;
vomiting, loss of appetite; or
jaundice (yellowing of the skin or eyes), and not feeling well.
If you take Harvoni and you also take a heart rhythm medicine called amiodarone: This combination of medicines can cause dangerous side effects on your heart. Get medical help right away if you take these medicines and you have:
very slow heartbeats, chest pain, shortness of breath;
confusion, memory problems; or
weakness, extreme tiredness, light-headed feeling (like you might pass out).
Common Harvoni side effects may include:
weakness;
headache; or
tired feeling.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Harvoni side effects (more detail)
