Tolerance means the no response of the individual as it was initially, to the same amount of the same drug. This may result in overdosing the drug to have a high experience.
Ex: Increasing the amount of Herroin when the amount
taken is not providing the same experience.
Dependence means, a person may experience withdrawal
symptoms if he/ she stops using the drug, and body doesn’t function well
without it.
Ex: a person may has a runny nose after stop using
Herroin, he/she should have it again to stop the runny nose. Then only the body
function normal.
Addiction is a disorder, where the individual can
function normally without the drug, but thinks or likes to have it again and
again.
These characteristics can only be seen in drug abuse
and can never be seen with drug use.
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