Heavy users, especially among the young adult population, may show slow and confused thinking, loss of energy, and physical discomfort caused by abdominal cramps and diarrhea. Other side effects associated with chronic use of marijuana are chromosome damage, decreased levels of the male sex hormone, and brain damage. Cocaine Cocaine abusers often have a stuffy, runny nose with eczema around the nostrils and possible perforation of the nasal septum. In addition, cocaine can cause delirium, hallucinations, blurred vision, severe chest pain, muscle spasms, convulsions, and even death. These drugs can cause very rapid or irregular heartbeat, tremors, loss of coordination, collapse, and even death from heart failure or from burst blood vessels in the brain.
Heavy users are prone to irrational acts.
Heroin This is an opiate drug that causes the body to have diminished pain reactions. Some of the risks associated with the use of heroin include slowing of the heart rate so much that coma and death can be induced. In addition, chronic constipation and depression of male and female sex hormones are other associated risks from heroin. These drugs are not illicit if they are used in accordance with the prescription. However, sharing prescription medication with someone else is illegal and could be very harmful.