TY - JOUR
PY - 2020//
TI - Circadian regulation of breath alcohol concentration
JO - Sleep
A1 - Rukmini, A. V.
A1 - Jos, Anna Mini
A1 - Yeo, Sing-Chen
A1 - Lee, Noel
A1 - Mo, Di
A1 - Mohapatra, Litali
A1 - Karamchedu, Swathy
A1 - Gooley, Joshua J.
SP - ePub
EP - ePub
VL - ePub
IS - ePub
N2 - STUDY OBJECTIVES: The role of the circadian clock in regulating blood/breath alcohol levels after consuming alcohol is uncertain. Our goal was to evaluate the degree to which the circadian system regulates breath alcohol concentration (BrAC) pharmacokinetic parameters. METHODS: Twenty healthy adults aged 21-30 y took part in a 4-d laboratory study. A 40-h constant routine procedure was used to assess circadian rhythms. Every 4 h, participants were given a fixed oral dose of alcohol with breathalyzer measurements taken every 5 min to construct BrAC curves. Sinusoidal models were used to test for circadian variation of the peak BrAC, the time to reach peak BrAC, the absorption rate, the elimination rate, and the time for BrAC to return to zero after alcohol was ingested. RESULTS: A significant circadian rhythm was detected for group-averaged peak BrAC values and the time for BrAC to return to zero, but not other BrAC variables. Peak BrAC values were lowest in the evening near the peak of the core body temperature rhythm and nadir of the salivary cortisol rhythm. Peak BrAC values increased during the night and reached their highest levels in the morning and afternoon. The time needed for BrAC to return to zero was also longest in the late morning and afternoon. CONCLUSION: The circadian system modulates some BrAC pharmacokinetic parameters. In normally entrained individuals, taking the same oral dose of alcohol at different times of day can result in different BrAC responses. These findings have potential implications for alcohol-related accidents and alcohol toxicity. Keywords: Ethanol impaired driving Language: en
LA - en
SN - 0161-8105
UR - http://dx.doi.org/10.1093/sleep/zsaa270
ID - ref1
ER -