Individuals who use opiates such as morphine, hydromorphone, or oxycodone may experience withdrawal symptoms within six to 12 hours of the last dose.
PCP users sometimes experience a feeling of impending doom.
Opiate addicted individuals should receive professional opiate detox services to help them through the potentially dangerous withdrawal process.
Out of the nearly 2 million substance abuse treatment admissions reported to State administrative data systems in 2008, heroin and other opiates made up the largest percentage of drug-related admissions (20.0 percent).