Because of this people who smoke cigarettes often are shaky or jittery. Nicotine also speeds up the heart, making it work harder. Think of other ways nicotine affects the body. This is because it acts as both. Think of some long-term effects of using marijuana, or effects that can happen years after a person uses the drug.
Cocaine is an addictive substance which comes from coca leaves or is made synthetically.
This drug acts as a stimulant to the central nervous system. These chemicals trick the brain into feeling it has experienced pleasure. The effects of cocaine occur within the first few minutes, peak in 15-20 minutes and disappear in about 1 hour. The immediate effects are what make cocaine so addicting. The user is willing to endure the lows in order to experience the highs.