I would like to know the side effects of cocaine?

Many harmful effects. Besides being highly addictive, Cocaine can do harm in many ways. It is a powerful vasoconstrictor, & can cause a shortage of bloodflow & permanent damage to any organ/body part. Anxiety, agitation, paranoia, tremors, inability to sleep and mania or grandiosity are most common effects. Heart attack and stroke are deadliest. Fetuses, infants, children and teens can get brain damage w/ or w/o stroke.