"Hard drugs", such as heroin, meth, and cocaine, are chemically addictive. This means that if a person starts taking heroin, meth, or cocaine, that person's body will physically need to keep taking the drug. If they try to stop using the drug, they may become very sick. Cannabis and hashish are not "chemically" addictive, but they can be "psychologically" or habitually addictive. This means that people can get so used to the pleasure cannabis causes that they feel as if they need the drug. Unlike with alcohol, tobacco, and hard drugs, most people who use cannabis can stop taking it when they want, while experiencing only minor withdrawal symptoms. However, while cannabis may not be as addictive as other drugs, people can still become very much addicted to the pleasure of cannabis.