Artesunate injections are a medication used to treat severe malaria caused by Plasmodium falciparum. It is a fast-acting medication that works by killing the malaria parasites in the blood. Artesunate is usually administered by injection, either into a vein or a muscle, under the supervision of a healthcare professional. It is important to seek medical attention immediately if you experience symptoms of severe malaria, such as fever, chills, headache, and body aches. Artesunate injections may cause side effects such as dizziness, nausea, and vomiting in some people.