How THC affects you
When cannabis is smoked, THC gets quickly into the blood through the lungs. It then goes to the brain and this is when the high is felt. This can happen within a few minutes and can last up to five hours from each time the smoke is inhaled.
When cannabis is eaten, THC is absorbed more slowly into the blood as it has to pass through the stomach and intestine. Not only does it take longer to experience the high when the drug is used in this way, the effects can also last for much longer, particularly those that are regarded as unpleasant by the user, such as hallucinogenic effects.
THC is absorbed quickly into body fat. It is then released very slowly back into the blood. It can take up to one month for a single dose of THC to fully leave the body.
