There are numerous health problems that may occur as a result of cocaine use. The area most often damaged by inhaling cocaine is the nose. The mucous membranes may become irritated and inflamed and painful sores may develop inside the nostrils. Chronic sneezing, frequent nosebleeds, and nasal congestion are common symptoms.
Users also can develop a perforated septum, which is a hole in the nasal membrane.
Those who inject cocaine run the risk of developing hepatitis or HIV disease by using infected needles. Cocaine smokers risk lung damage. One of the most dangerous reactions comes from the drug's ability to restrict coronary arteries, which raises blood pressure and diminishes the blood supply to the heart. This can result in heart attacks or convulsions. And because regular use can make the brain very sensitive to the drug, overdose can occur after ingesting even a small amount of cocaine.