Lumefantrine is an antimalarial medication commonly used in combination with artemether to treat uncomplicated malaria caused by the Plasmodium falciparum parasite. It works by inhibiting the growth of the parasite in the blood, helping to reduce symptoms and clear the infection. This medication is typically taken as a tablet, and it is important to complete the full course as prescribed to ensure effectiveness. Side effects may include headache, dizziness, and gastrointestinal issues, but serious reactions are rare. Always consult a healthcare professional before starting treatment with lumefantrine.