It also can intensify underlying emotional problems and is associated with chronic anxiety, depression and paranoia. Perception and cognition are impaired and muscular coordination decreases. Speech is blocked and incoherent. Chronic users of PCP may have memory problems and speech difficulties lasting six months to a year after prolonged daily use. Depression, anxiety and violent behavior also occur.
Large doses produce convulsions, comas, and heart and lung failure.
Physical effects include dilated pupils, elevated body temperature, increased heart rate and blood pressures, decreased appetite, insomnia, and tremors. Psychological reactions include panic, confusion, paranoia, anxiety, and loss of control. Flashbacks, or delayed effects, can occur even after use has ceased. Cocaine - Cocaine stimulates the central nervous system. Immediate physical effects include dilated pupils and increased blood pressure, heart rate, respiratory rate and body temperature.