Sustiva is used to treat HIV (Human Immunodeficiency Syndrome). The generic version is called Efavirenz. The average Sustiva cash price is about $237.89 for a supply of Capsule 200 MG 30 pcs. You can reduce your Sustiva cost by up to 75% with our free Sustiva discount card. Bring it to a participating pharmacy near you to save on your prescription medication.