The abuse of diet pills can cause symptoms similar to those from using amphetamines. Diet pills, along with laxatives and vomit-inducing substances, are often used by individuals with eating disorders and can be fatal. Extremely high doses of amphetamines can cause a rapid or irregular heartbeat, tremors, loss of coordination and even physical collapse. An amphetamine injection creates a sudden increase in blood pressure, which can result in stroke, very high fever or heart failure. In addition to the physical effects, users report feeling restless, anxious and moody.
High doses intensify the effects.
Persons who use large amounts of amphetamines over a long period of time can develop an amphetamine psychosis that includes hallucinations, delusions and paranoia. These symptoms usually disappear when drug use ceases. Depressants The effects of depressants are, in may ways, similar to the effects of alcohol. Small amounts can produce calmness and relaxed muscles, but somewhat larger doses can cause slurred speech, staggering gain and altered perception. Very large doses can cause respiratory depression, coma and death.