Heavy users may take heroin to dull the craving caused by the use of crack. The Risks Heavy use can lead to potentially fatal heart problems. Heavy users risk convulsions. Crack is highly addictive. Because the high can be so intense, crack use is often difficult to control.
Smoking crack can seriously harm the lungs and cause chest pains.
After the high, feelings of restlessness, nausea ad sleeplessness are common. Large or frequent doses over a short period can leave users restless, confused and paranoid. Regular users may find their habit very expensive. Users have died from overdose.