The most dramatic and noticed effect alcohol has is on the brain. It produces lack of coordination, confusion disorientation, stupor, anesthesia, coma, and finally death. Cocaine users save increased sensitivity to light, see fuzzily, see 'floaters', have double vision or image distortion. Using 3-5 marijuana joints a week equals smoking 16 cigarettes daily. Smoking is associated with gum disease, loss of teeth, cancer of the cheeks, gums, palate, tongue, lips, larynx and esophagus.
Cocaine increases heart rate and arteries constrict.
Restricted blood flow to the heart may cause a heart attack. Cocaine use causes inflammation and breakdown of small and medium arteries in the kidneys and gastrointestinal tract. Users may experience impotency and infertility. Females may experience infertility, pregnancy complications, and changes in sexual characteristics. Cocaine users have babies addicted at birth.