Research on long-time users suggests it may cause brain damage and mental illness as well as liver and kidney problems in later life. People with problems such as epilepsy, high blood pressure and depression are thought to be more likely to suffer side effects from ecstasy use. Back to top Cocaine Cocaine is a stimulant that causes a feeling of exhilaration and decreases appetite. Users may experience indifference to pain and tiredness. Many users believe they perform better on cocaine, but research shows that this is probably just their perception rather than reality.
Cocaine can make the heart beat irregularly and increases body temperature.
Large or frequent doses can reduce libido and lead to restlessness and paranoia. Very large doses can cause death through heart or respiratory failure. Common side effects after coming down from the drug include depression and tiredness. Withdrawal symptoms include restlessness and severe anxiety. Some people are very sensitive to the drug and may die after their first dose.