However, when quinine or amphetamines are added, the potential for serious side effects increases dramatically. The term crack refers to the crackling sound that is heard when the mixture is smoked. Crack is usually smoked in a pipe. Because it's smoked, crack cocaine effects are felt more quickly and they are more intense than those of powder cocaine. However, the effects of smoked crack are shorter lived than the effects of snorted powder cocaine.
Cocaine addiction can occur very quickly and be very difficult to break.
Animals must have their access to cocaine limited in order not to take toxic or even lethal doses. People addicted to cocaine behave similarly. They will go to great lengths to get cocaine and continue to take it even when it hurts their school or job performance and their relationships with loved ones. Crack and other forms of cocaine can cause feelings of anxiety and depression, which may last for weeks. Attempts to stop using the drugs can fail simply because the resulting depression can be overwhelming, causing the addict to use more cocaine in an attempt to overcome his depression.