Meth, like crack, is also smoked, and its effects can be felt almost instantly. Meth addiction, similar to crack, happens rapidly. Meth is an illicit drug that usually looks like a white crystalline powder. It is a synthetic stimulant drug, meaning it is made by combining different chemicals. Meth belongs to a drug class called amphetamines. Crack addiction can happen quickly and lead to devastating side effects. It has the appearance of small chunks or “rocks” that are white, yellow, or brownish in color.Ĭrack cocaine use is especially dangerous and addictive, because the drug can be smoked. Characteristics Of CrackĬrack cocaine is a form of cocaine that requires further processing or “cooking” powder cocaine. However, they also have some major differences. Crack and meth are similar in that they are both stimulant drugs that are relatively cheap, highly addictive, and usually used by smoking.