The long-term effects of crack abuse include:

Depression
Anxiety
Paranoia
Aggressiveness
Hallucinations
Sexual Problems/Dysfunction
Loss of Life
With addiction to crack also come severe withdrawal effects when the drug is not in the system. This can include things like depression or being down, fatigue, intense anxiety, irritability and in some cases psychosis. Some abusers of this drug will continue to use even though they don’t want to just to avoid stimulant withdrawal. Excessive crack use can also lead to heart problems, respiratory failure, stroke, seizures and ultimately loss of life.