Kolkata, Sep 10 (UNI) Opioids are substances derived from the opium poppy, or synthetic analogues with similar effects.
Examples are morphine, heroin, tramadol, oxycodone and methadone.
Opioids have the potential to cause substance dependence that is characterized by a strong desire to take opioids, impaired control over opioid use, persistent opioid use despite harmful consequences, a higher priority given to opioid use than to other activities and obligations, increased tolerance, and a physical withdrawal reaction when opioids are discontinued.