Kolkata: 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.
Dependence on prescription opioids includes iatrogenic dependence following the treatment of chronic pain, and dependence following the diversion and theft of prescription opioids from patients, medical facilities, pharmacies and the manufacturing and distribution chains.
Due to their effect on the part of the brain which regulates breathing, opioids in high doses can cause respiratory depression and death. An opioid overdose can be identified by a combination of three signs and symptoms referred to as the “opioid overdose triad”.
The symptoms of the triad are: pinpoint pupils, unconsciousness and respiratory depression.
Combining opioids with alcohol and sedative medication increases the risk of respiratory depression and death, and combinations of opioids, alcohol and sedatives are often present in fatal drug overdoses.
Because of their capacity to cause respiratory depression, opioids are responsible for a high proportion of fatal drug overdoses around the world. The number of opioid overdoses has increased in recent years, in part due to the increased use of opioids in the management of chronic non-cancer pain.
About 275 million people worldwide (5.6 per cent of the global population aged 15-64 years) used drugs at least once during 2016. Among them, there were about 34 million people who used opioids and about 19 million who used opiates.
There were an estimated 27 million people who suffered from opioid use disorders in 2016. The majority of people dependent on opioids used illicitly cultivated and manufactured heroin, but an increasing proportion used prescription opioids. (UNI)
