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Concept
Opioid overdose
Résumé
An opioid overdose is toxicity due to excessive consumption of opioids, such as morphine, codeine, heroin, fentanyl, tramadol, and methadone. This preventable pathology can be fatal if it leads to respiratory depression, a lethal condition that can cause hypoxia from slow and shallow breathing. Other symptoms include small pupils (with the exception of pethidine, where there may be dilated pupils), and unconsciousness, however its onset can depend on the method of ingestion, the dosage and individual risk factors. Although there were over 110,000 deaths in 2017 due to opioids, individuals who survived also faced adverse complications, including permanent brain damage.
Opioid overdoses are diagnosed based on symptoms and examination. Risk factors for opioid overdose include high levels of opioid dependence, use of opioids via injection, high dosed opioid usage, having a mental disorder or having a predisposition for one, and use of opioids in combination with other substances, such as alcohol, benzodiazepines, or cocaine. Dependence on prescription opioids can occur from their use to treat chronic pain in individuals. Additionally, if following a period of detoxification, which allows the tolerance level to fall, the risk of overdose upon return to use is high.
Initial treatment of an overdose involves supporting the person's breathing and providing oxygen to reduce the risk of hypoxia. Naloxone is then recommended to those who cannot reverse the opioid's effects through breathing. Giving naloxone via nasal administration or as an injection into a muscle has shown to be equally effective. Other efforts to prevent deaths from overdose include increasing access to naloxone and treatment for opioid dependence.
Drug use contributes to 500,000 deaths worldwide, with opioid overdose resulting in approximately 115,000 of these deaths in 2018. This is up from 18,000 deaths in 1990. In 2018, approximately 269 million people had engaged in drug usage at least once, 58 million of which used opioids. Drug use disorders have affected around 35.
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