The effect/harmfulness that a drug has on a person is determined by many
factors.
The primary factors that influence drug effect are the type of drug
and the quantity used and other factors may include:
- time taken to consume the drug,
- tolerance,
- gender,
- size and
amount of muscle,
- other psycho-active drugs in the
person's bloodstream,
- mood or attitude
of the user,
- expectation of the
drug effect,
- setting or environment
in which the drug was consumed.
