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6β-Naltrexol, or 6β-hydroxynaltrexone (developmental code name AIKO-150), is a peripherally-selective opioid receptor antagonist related to naltrexone. [2] [3] It is a major active metabolite of naltrexone formed by hepatic dihydrodiol dehydrogenase enzymes.
[6] [7] Peak concentrations of naltrexone are 19 to 44 μg/L after a single 100 mg oral dose and time to peak concentrations of naltrexone and 6β-naltrexol is within 1 hour. [6] [7] [3] Linear increases in circulating naltrexone and 6β-naltrexol concentrations occur over an oral dose range of 50 to 200 mg. [6] Naltrexone does not appear to be ...
A 2023 systematic review published in the Australian Journal of General Practice found that preliminary research into the use of low-dose naltrexone as a treatment for fibromyalgia is promising. All clinical studies examined showed statistically significant improvements in pain and pain tolerance with mild side effects, however, sample sizes ...
Naltrexone/bupropion, sold under the brand name Contrave among others, is a fixed-dose combination medication for the management of chronic obesity in adults in combination with a reduced-calorie diet and increased physical activity. [4] [6] It contains naltrexone, an opioid antagonist, and bupropion, an aminoketone atypical antidepressant. [4]
Case reports that used doses of 0.1 mg/kg (maximum of 2 mg/dose) repeated every 1–2 minutes (10 mg total dose) have shown inconsistent benefit. [28] As the doses used throughout the literature vary, it is difficult to form a conclusion regarding the benefit of naloxone in this setting. [ 29 ]
(+)-Naloxone (dextro-naloxone) is a drug which is the opposite enantiomer of the opioid antagonist drug (−)-naloxone.Unlike (−)-naloxone, (+)-naloxone has no significant affinity for opioid receptors, [1] but instead has been discovered to act as a selective antagonist of Toll-like receptor 4.
[1] [2] The combination of the two drugs is thought to result in a selective blockade of the KOR and hence fewer MOR activation-related concerns such as euphoria and opioid dependence.
Nalmefene, sold under the brand name Revex among others, is a medication that is used in the treatment of opioid overdose and alcohol dependence. [2] [3] Nalmefene belongs to the class of opioid antagonists and can be taken by mouth, administered by injection, or delivered through nasal administration.