What happens when people use marijuana and hashish over a long period of time?
Regular cannabis users can develop tolerance, which means they need more of the drug to feel the same effects. Some people can come to depend on the drug, and may not be able to stop using it on their own. Some people who stop after using cannabis heavily have withdrawal symptoms like sweating, shaking, upset stomach, loss of appetite and trouble sleeping. This is still being studied, but we do know that marijuana and hashish smoke are similar to tobacco smoke in some ways. Smoking marijuana or hashish can damage the lungs. It can also play a part in leaving the body vulnerable to diseases that interfere with breathing, such as bronchitis. Heavy use of marijuana and hashish may also lead to difficulty remembering things and concentrating.
