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Physical dependence potential of daily tramadol dosing in humans
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Journal Article
Physical dependence potential of daily tramadol dosing in humans
2010
Overview
Rationale
Tramadol is an atypical, mixed-mechanism analgesic involving both opioid and catecholamine processes that appears to have low abuse potential and may be useful as a treatment for opioid dependence.
Objectives
The current study assessed the level of physical dependence and opioid blockade efficacy produced by daily maintenance on oral tramadol.
Methods
Nine residential opioid-dependent adults were maintained on two doses of daily oral tramadol (200 and 800 mg) for approximately 4-week intervals in a randomized, double-blind, crossover design. The acute effects of intramuscular placebo, naloxone (0.25, 0.5, and 1.0 mg), and hydromorphone (1.5, 3.0, and 6.0 mg) were tested under double-blind, randomized conditions. Outcomes included observer- and subject-rated measures and physiologic indices.
Results
Challenge doses of naloxone resulted in significantly higher mean peak withdrawal scores compared to placebo. Withdrawal intensity from naloxone was generally greater during 800 versus 200 mg/day tramadol maintenance. Mean peak ratings of agonist effects were elevated at higher hydromorphone challenge doses, but did not differ significantly between tramadol doses. Physiologic measures were generally affected by challenge conditions in a dose-dependent manner, with few differences between tramadol maintenance dose conditions.
Conclusions
Chronic tramadol administration produces dose-related opioid physical dependence, without producing dose-related attenuation of agonist challenge effects. Tramadol may be a useful treatment for patients with low levels of opioid dependence or as a treatment for withdrawal during opioid detoxification, but does not appear to be effective as a maintenance medication due to a lack of opioid cross-tolerance.
Publisher
Springer-Verlag,Springer,Springer Nature B.V
Subject
/ Analgesics, Opioid - administration & dosage
/ Analgesics, Opioid - adverse effects
/ Analgesics, Opioid - pharmacology
/ Biological and medical sciences
/ Biomedical and Life Sciences
/ Dose-Response Relationship, Drug
/ Female
/ Humans
/ Hydromorphone - administration & dosage
/ Hydromorphone - pharmacology
/ Male
/ Naloxone - administration & dosage
/ Narcotic Antagonists - administration & dosage
/ Narcotic Antagonists - pharmacology
/ Opioid-Related Disorders - etiology
/ Opioid-Related Disorders - rehabilitation
/ Pharmacology. Drug treatments
/ Substance Withdrawal Syndrome - rehabilitation
