Acetaminophen modulation of HYDROCODONE (cas 125-29-1) reward in rats

Add time:10/01/2019    Source:sciencedirect.com

Abuse of prescription opioid analgesics in non-medical context has been on the rise over the past decade. The most commonly abused analgesic in this drug class consists of a combined formulation of HYDROCODONE (cas 125-29-1) and acetaminophen. The present study was aimed to determine the rewarding effects of hydrocodone, acetaminophen, and their combination using the conditioned place preference (CPP) paradigm. Using a 6-day CPP paradigm, rats were paired with hydrocodone (0.5, 1.0 or 5.0 mg/kg) or acetaminophen (50, 100 or 300 mg/kg) to determine whether the drugs given alone would produce a CPP. Rats conditioned with the highest dose of hydrocodone exhibited place preference, whereas rats conditioned with acetaminophen did not demonstrate place preference. In a second experiment, varying doses of hydrocodone and acetaminophen were combined to determine whether acetaminophen would enhance hydrocodone reward. Acetaminophen (100 mg/kg) enhanced the rewarding effects of hydrocodone (1 mg/kg), although the effect was unique to this particular dose combination. Higher or lower doses of acetaminophen combined with hydrocodone did not alter hydrocodone CPP. The present findings suggest that acetaminophen has a limited potential of modulating the rewarding properties of hydrocodone in rats.

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