It can be due to a serious of savage convulsions, paralysis of the breathing or sudden heart failure. In people with heart, lung or blood pressure problems, low doses, no matter how they are administered, can produce sudden death. People who are allergic to cocaine can go into fatal shock with small doses. The sudden surge of blood pressure associated with cocaine use may produce a stroke. Chronic complications with the regular use of cocaine include nasal congestion, inflammation and even perforation of the septum of the nose, dental problems and an eventual loss of sex drive.
Malnutrition can also occur because of the drugs anti-appetite effects.
Smoking of crack can produce chronic inflammation and soreness of the throat with hoarseness of voice and lung complications. Cocaine use in pregnancy can lead to miscarriage and is linked with low birth weight, still birth and congenital defects and the new born baby can be already addicted and experience withdrawal symptoms. If taken via the veins then there is a risk of AIDS and hepatitis from the use of an infected needle. Treatment of dependency necessitates withdrawal. This can be associated with acute depression which can lead to suicide.