Physical addiction

Regular use of this drug can lead to physical addiction. This means that in addition to the psychological urge to take more, withdrawal symptoms arise when using is interrupted or stopped. Withdrawal symptoms include but are not limited to: poor sleep, sweating and becoming restless.

Withdrawal symptoms are often a reason to start drinking or using again. In actuality, those phenomena are only temporarily  suppressed.

Tolerance or habituation also occurs. That means if you use it regularly, you need more to feel the same effect.

Tolerance and stimulants

With stimulant use, tolerance will build-up for both the mental changes and appetite-suppressing effect, but not for cardiovascular effects. The higher your dose, the higher your blood pressure.