As with other drugs, ondansetron can cause side effects, such as fatigue, headache, and constipation. If side effects of ondansetron become difficult to tolerate, talk with your doctor or pharmacist.

Hydroxychloroquine is a generic prescription drug for malaria and other conditions. It’s also available as the brand-name drugs Plaquenil and Sovuna. Hydroxychloroquine can cause mild to serious side ...