Opioid overdose
Encyclopedia
An opioid overdose is due to excessive use of narcotics.

It should not be confused with opioid dependency.

Symptoms

Opiate overdose symptoms and signs include: decreased level of consciousness and pinpoint pupil except with meperidine (Demerol) where one sees dilated pupils.

Treatment

Naloxone
Naloxone
Naloxone is an opioid antagonist drug developed by Sankyo in the 1960s. Naloxone is a drug used to counter the effects of opiate overdose, for example heroin or morphine overdose. Naloxone is specifically used to counteract life-threatening depression of the central nervous system and respiratory...

 is very effective reversing the cause, rather than just the symptoms, of an opioid overdose. A longer-acting variant is naltrexone
Naltrexone
Naltrexone is an opioid receptor antagonist used primarily in the management of alcohol dependence and opioid dependence. It is marketed in generic form as its hydrochloride salt, naltrexone hydrochloride, and marketed under the trade names Revia and Depade...

. Naltrexone is primarily meant to treat opioid and alcohol dependence. Diprenorphine
Diprenorphine
Diprenorphine is an opioid antagonist used to reverse the effects of the super-potent opioid analgesics such as etorphine and carfentanil that are used for tranquilizing large animals in veterinary medicine....

 is similar in action to naloxone, only it is significantly stronger and is reserved for acting as an antagonist to the strongest, non-human opioids, such as carfentanyl (in fact, carfentanyl, and other opioids for usage on large animals such as elephants, often come packaged with Revivon to be used after carfentanyl is no longer needed in the animal).

Co-ingestion

Opioid overdoses associated with a conjunction of benzodiazepines or alcohol
Alcohol
In chemistry, an alcohol is an organic compound in which the hydroxy functional group is bound to a carbon atom. In particular, this carbon center should be saturated, having single bonds to three other atoms....

 use leads to a contraindicated condition wherein higher instances of general negative overdose traits native to the overdose profile of opioid use alone but to a much greater extent. Other CNS depressants, or "downers", muscle relaxers, pain relievers, anti-convulsants, anxiolytics (anti-anxiety drugs), treatment drugs of a psychoactive or epileptic variety or any other such drug with its active function meant to calm or mitigate neuronal signaling (barbiturate
Barbiturate
Barbiturates are drugs that act as central nervous system depressants, and can therefore produce a wide spectrum of effects, from mild sedation to total anesthesia. They are also effective as anxiolytics, as hypnotics, and as anticonvulsants...

s, etc) can additionally cause a worsened condition with less likelihood of recovery cumulative to each added drug of a diverse or disparate hampering effect to the central or peripheral nervous system of the user. This includes drugs less immediately classed to a slowing of the metabolism such as with GABAergics like GHB
Gamma-Hydroxybutyric acid
γ-Hydroxybutyric acid , also known as 4-hydroxybutanoic acid and sodium oxybate when used for medicinal purposes, is a naturally occurring substance found in the central nervous system, wine, beef, small citrus fruits, and almost all animals in small amounts. It is also categorized as an illegal...

 or glutamatergic antagonists like PCP
Phencyclidine
Phencyclidine , commonly initialized as PCP and known colloquially as angel dust, is a recreational dissociative drug...

 or Ketamine
Ketamine
Ketamine is a drug used in human and veterinary medicine. Its hydrochloride salt is sold as Ketanest, Ketaset, and Ketalar. Pharmacologically, ketamine is classified as an NMDA receptor antagonist...

.
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