oops...wrong button.  Malarone is safer and the better option.  In the 1990's doxycyline was the better choice over mefloquine as far as avoiding the vivid dreams, hallucinations, which in itself can be risky as a backpacker.  Mefloquine is a PSYCHOTROPIC hallcucinogenic drug that happens to have anti-malarial effects.  I prefer to use doxycyline and although not perfect, doesn't give me the same level of cognitive and emotional impairment as mefloquine.