As part of withdrawal from these drugs after sudden cessation of use, sedatives and benzodiazepines can cause rebound insomnia when used regularly to aid sleep.
Other names for PCP are angel dust, ozone, wack or rocket fuel
In late 2003 researchers found at least 93 cases of babies who were experiencing neonatal convulsions and withdrawal symptoms because their mothers had used antidepressants while carrying the baby to term.
Opiate overdose can occur when opiates slow down respiration to the point that can cause the person to stop breathing altogether and die.