So I'm not going to elaborate. Especially since we have Lurky McLurkerson. But... If you read this and catch my meaning. Well, you know. Low doses of cocaine or crack cocaine generate euphoria and mental alertness. The abuser may become talkative and energetic. Cocaine abuse also increases a person's sensitivity to visual and tactile stimuli during the acute effects of the drug. Some cocaine abusers take cocaine to complete simple tasks faster. High doses of cocaine or crack cocaine can produce violent and paranoid behavior. A pattern of cocaine abuse called binging (repetitive cocaine abuse at increasingly higher doses) causes increasing restlessness and paranoia that may culminate in hallucinations and paranoid psychosis. abdominal pain blurred vision bowel gangrene (from "chewing") chest pain chronic malnutrition coma convulsions fever headaches heart attacks heart rhythm disturbances hoarseness (from snorting) impotence loss of appetite loss of smell (from snorting) muscle spasms nasal inflammation (from snorting) nausea nose bleeds (from snorting cocaine) respiratory failure runny noses (from snorting) seizures strokes needle puncture (track) marks from injecting cocaine.