Get emergency medical help if you have signs of an allergic reaction to Sovaldi: 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;
dark urine, clay-colored stools; or
jaundice (yellowing of the skin or eyes).
If you take Sovaldi 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 Sovaldi side effects may include:
headache, feeling tired;
anemia;
nausea, loss of appetite; or
sleep problems (insomnia).
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.
 Sovaldi side effects (more detail)
