daytime drowsiness
Midday urge to nap
Daytime drowsiness is the urge to sleep during waking hours, whether from poor nighttime rest, medication side effects, or underlying conditions like sleep apnea.
It differs from ordinary tiredness—drowsiness specifically pulls toward sleep: The antihistamine caused daytime drowsiness.
Also called daytime sleepiness.
- sleepinessState of needing rest
- fatigueWeariness from prolonged exertion
- sleep deprivationInadequate rest condition
- lethargyAbnormal drowsiness and apathy
- yawningOpening mouth when tired
heavy eyelids · napping · power nap · sluggish · heavy-eyed · midday · food coma · siesta · nodding · nodding off · falling asleep · exhaustion · caffeine · coffee · eyelids · couch · afternoon · slump
- sleep disruptionsinsomnia, jet lag, sleep apnea, sleep deprivation, sleep debt
alertness level
daytime drowsinessalertness
Active mental awareness
wakefulness · vigilance · wide awake · mental clarity · attentiveness
daytime, times, timed, timing, timer, timely, untimely, drowsy, drowse