It's important to make informed decisions when it comes to your health. There are both short- and long-term effects of cannabis use. Some effects can be pleasant, unpleasant, or potentially harmful. How cannabis affects you may be different for someone else. Effects can vary especially for people under 25 years of age.
In addition to age of initiation, other factors that shape one’s experience with cannabis and level of risk include:
Research to date on the effects and risks associated with weed is based on cannabis with much lower THC levels than what is available today, and is usually based on samples of heavy users. As the research develops, its important to collect as much information as possible to inform your decisions and conversations about cannabis.
Short-term effects after consuming weed may include:
CAUTION: Short-term effects can be increased if alcohol or other substances are consumed on the same occasion.
Using cannabis frequently, over time, and before the age of 25 (especially before age 16) increases your chances of experiencing potential negative long-term effects. You may experience some, none, or all of the following:
Negative long-term effects may reverse after use stops.
If you or someone you know have signs of dependence, or have tried to stop without success there are supports to help cut back, or quit:
Cannabis withdrawal symptoms, which peak within the first week of quitting and can last up to two weeks, may include:
If you or someone you know experiences withdrawal and symptoms persist or become difficult to manage, talk to a health care provider for assistance.