remember:

when choosing your malaria medication, mefloquine, while cheaper, may have:

"severe and permanent adverse side-effects. It is known to cause severe depression, anxiety, paranoia, aggression, nightmares, insomnia, seizures, birth defects, peripheral motor-sensory neuropathy,^[2] vestibular (balance) damage and central nervous system problems. For a complete list of adverse physical and psychological effects — including suicidal ideation — see the most recent product information."

meanwhile, users of it's more expensive cousin, Malarone (Atovaquone, A+P):

"(may) have difficulty sleeping (nightmares, incoherent dreams) while taking Malarone."