Premium
Effects of caffeinated alcoholic beverages with low alcohol and high caffeine content on cognitive and motor functions
Author(s) -
Cheng WanJu,
Lin ChunCheng,
Cheng Yawen,
Huang MingChyi
Publication year - 2017
Publication title -
human psychopharmacology: clinical and experimental
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.461
H-Index - 78
eISSN - 1099-1077
pISSN - 0885-6222
DOI - 10.1002/hup.2634
Subject(s) - sobriety , caffeine , stroop effect , alcohol , placebo , psychology , poison control , audiology , cognition , injury prevention , medicine , psychiatry , environmental health , biochemistry , chemistry , alternative medicine , pathology
Objective In Taiwan, caffeinated alcoholic beverages (CABs), with high caffeine but low alcohol concentrations compared to those sold in Western countries, are commonly consumed at work and have been associated with work‐related injuries. However, the effects on cognitive and motor functions and self‐perception have not been examined. Methods Twenty‐eight healthy male volunteers (mean age: 32.6 ± 2.7) participated in the study. Each participant visited our laboratory 4 times at intervals of at least 1 week and was assigned to one of 4 trials in a counterbalanced order at each visit: placebo, alcohol, caffeinated energy drink, and CAB. They completed the subjective perception ratings, go/no‐go tasks, Stroop color‐word tests, Purdue pegboard tests, and the standardized field sobriety test. We used analysis of variance to examine the intraindividual differences in the performance. Results Consuming alcohol of 0.23 g/kg typically consumed by Taiwanese CAB drinkers caused significant impairments in fine and crude motor functions; caffeine (1.5 mg/kg) did not antagonize these effects but led to an improvement in response speed in the go/no‐go task. The subjective perceptions produced by alcohol were not masked by caffeine. Conclusions CABs that contains a higher ratio of caffeine to alcohol did not counteract the motor function impairments induced by alcohol.