Lived in Mali for two years and gave up on the drugs after six months. Apparently prolongued use isn't good for you. All of them seemed to have nasty side effects. I carried fresh, bought in North America, Larium and Chloroquine in case I needed it if I caught the bug. Other than that used bug juice, Off Skintastic comes in an aloe vera type moisturizer and mosquito nets and I was fine.
Another tip is to take one of the "debug" spray bombs from the purser kit, activate it, chuck it in your room and head to the bar for a nightcap.. .Should clear out most of the mossies.