Little story to lighten the load:
Last year, before I went to Africa and got my Hep A, Yellow fever and Meningitis shots in Russia (cost me $50 for everything) I asked about Malaria and anything I can take do to, well...not get it.
Doctor said to use Maleron, but when I said that I was going there to fly aircraft, her eyes almost shot out of her sockets and she said repeatedly: "No, No, No! Do not, under any circumstance take any anti-malaria medication if you plan to operate anything more complex than a car! They all have side effects like hallucinations and disorientation! Promise me you will not take anything!" She then gave me a container of pills and said: "if you feel any flu-like symptoms when you are in Africa, it is not the flu. It is Malaria, and only then do you take these pills!"