energy, increased self-esteem, self-confidence, sociability, irritability, aggressiveness, psychosomatic disorders , psychomotor agitation , dermatillomania , trichotillomania , delusions of grandiosity, hallucinations , excessive feelings of power and invincibility, repetitive and obsessive behaviors, paranoia , and, with chronic use and/or high doses, amphetamine psychosis. [ 14 ] [ 20 ] [ edit