Irreversible physical side effects due to inhalant abuse can include bone marrow damage when gasoline is used for "huffing'.
Severe depression and vomiting are very common symptoms during morphine withdrawal.
Most physicians in the U.S. are unaware of the fact that methadone is more addictive than other forms of opiates.
Methamphetamine withdrawal symptoms that individuals commonly experience when they stop using the drug suddenly are fatigue, depression anxiety, irritability, headaches, agitation, an inability to remain still, excessive sleeping, vivid or lucid dreams, deep REM sleep and suicidal ideation and an increased appetite.