Rare but occasional heroin withdrawal symptoms which can occur when someone abruptly stops using the drug are cardiac arrhythmias, strokes, seizures, dehydration and suicide attempts.
The effects of LSD can sometimes be frightening and cause panic.
Of the over 20 million current illicit drug users aged 18 or older in 2010, over 13 million (65.9 percent) were working either full or part time.
Research indicates that short-term and outpatient drug rehab offers little more than drug education for individuals struggling with long-term addiction.