Tolerance is a phenomenon that can occur with any drug, not just illicit drugs.
Tolerance occurs when the body becomes less responsive to a drug over time.
Tolerance can lead to increased drug use as people try to achieve the same effect.
Tolerance can lead to physical and psychological dependence on a drug.
Tolerance can be short-lived or long-lasting.
Tolerance can be partial or complete.
Tolerance can develop to the therapeutic effects of a drug as well as to the side effects.
Tolerance is a major factor in the development of addiction.
Tolerance can be reversed if drug use is stopped.
Tolerance can vary from person to person.