Hyperalgesia after a Drinking Episode in Young Adult Binge Drinkers: A Cross-Sectional Study.

Abstract

Rodent studies propose potential mechanisms linking excessive drinking and pain hypersensitivity (hyperalgesia), such that stress hormones (i.e. epinephrine and cortisol) mediate induction and maintenance of alcohol withdrawal-induced hyperalgesia. The first aim of this study was to examine whether hyperalgesia would occur within 48h after a drinking episode in healthy young adult binge drinkers. The second was to examine whether stress hormones and negative effect would be associated with binge drinking or alcohol withdrawal-associated hyperalgesia. A cross-sectional experiment was conducted in five groups with naturally occurring drinking (mean age=19.6, range 18-29years): abstainers (n=43, 54% female), moderate drinkers with (n=50, 50% female) or without recent drinking (i.e. within 48h, n=23, 26% female) and binge drinkers with (n=36, 58% female) or without recent drinking (n=25, 44% female). All types of drinkers endorsed drinking about 2-3 times a month and 2-3years of drinking history. Muscle pressure pain thresholds were significantly lower in the binge group with recent drinking compared to other groups, but cutaneous mechanical and heat pain thresholds were not significantly different across the five groups. Basal epinephrine levels were significantly higher in binge groups regardless of recent drinking, but cortisol and negative effect were not significantly different across the five groups. This is the first study to show that alcohol withdrawal-associated muscle hyperalgesia may occur in healthy episodic binge drinkers with only 2-3years of drinking history, and epinephrine may play a role in binge drinking-associated hyperalgesia.