We recommend all travelers visiting Tanzania to take anti-malarials, even if you are only planning a short trip or a mountain climb because you will not be able to entirely avoid your exposure to malaria-transmitting mosquitoes.
Before leaving for Tanzania your doctor can recommend an anti-malarial medicine, along with instructions about dosage. Very often doctors will prescribe a course of antibiotics or anti-parasitic medicines as a preventative measure to be begun one to two weeks before departure for Tanzania. Whatever is prescribed, it is important that travelers follow dosing directions carefully.