Substance use - marijuana

Substance abuse - marijuana; Drug abuse - marijuana; Drug use - marijuana; Cannabis; Grass; Hashish; Mary Jane; Pot; Weed

Marijuana comes from a plant called hemp. Its scientific name is Cannabis sativa. The main, active ingredient in marijuana is THC (short for delta-9-tetrahydrocannabinol). This ingredient is found in the leaves and flowering parts of the marijuana plant. Hashish is a substance taken from the tops of female marijuana plants. It contains the highest amount of THC.

Marijuana is called by many other names, including cannabis, grass, hashish, joint, Mary Jane, pot, reefer, weed.

Some states in the United States permit marijuana to be used legally to treat certain medical problems. Other states have also legalized its recreational use.

This article is on the recreational use of marijuana, which may lead to abuse.

Marijuana's Effects on Your Brain

Harmful Effects of Marijuana

Marijuana can be Addictive

Treatment Options

Your Ongoing Recovery


When to Call the Doctor