"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, 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."