Some of these side effects may occur when taking this medication; they are as follows; Nausea, vomiting, diarrhea, headache, dizziness, trouble sleeping, or runny nose may occur. However if any of these effects persist or worsen, contact your doctor right away.
Tell your doctor right away if any of these unlikely but serious side effects occur: depression, symptoms of liver disease (such as nausea/vomiting that doesn't stop, loss of appetite, stomach/abdominal pain, yellowing eyes/skin, dark urine).
Atovaquone can commonly cause a mild rash that is usually not serious. However, you may not be able to tell it apart from a rare rash that could be a sign of a severe reaction. Get medical help right away if you develop any rash.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.