I am required to take this drug for work even though I dont get bitten and am worried about the side effects so far they have given me 3 options, malarone, larium and doxycycline but say we can choose another alternative that is as effective as these 3. I have been told by others who have taken preventive drugs as these that they get constant headaches, stomach pains and 1 guy had a mental breakdown. Could you please help, I wish there was a natural approved drug, I hope there is thanks.