Tolerance to magic mushrooms may occur, especially when they are ingested continuously over a short period of time.
Sudden cessation of long term use of morphine by long term heavily dependent users may be fatal, although morphine withdrawal is considered to be less dangerous than alcohol withdrawal.
When Xanax is prescribed for insomnia and the individual becomes dependent to the drug, insomnia will occur as a result of addiction to the drug.
When an individual completes a drug rehab program, follow-up treatment can be crucial to a person's success in achieving and maintaining a drug-free lifestyle.