The grogginess we may feel in the morning usually lasts for up to 30 minutes.
我们在早上的昏沉感通常会持续30分钟。
TED-Ed（视频版）
This often meant a lot of side effects, including headaches, grogginess, and cognitive impairments including difficulty with memory, thinking, and judgment.
这通常意味着很多副作用，包括头痛、昏昏沉沉和认知障碍，包括记忆、思考和判断困难。
VOA视频精选
We have a lot of patients that come in for jet-lag, they complained that melatonin causes a lot of headaches and grogginess the next day.
我们有很多病人因为倒时差的来买药，他们抱怨说，褪黑素带来了许多麻烦，第二天常常头疼或者头晕。
英语百科
Sleep inertia
（重定向自Grogginess）
Sleep inertia is a physiological state characterised by a decline in motor dexterity and a subjective feeling of grogginess immediately following an abrupt awakening. The impaired alertness may interfere with the ability to perform mental or physical tasks. Sleep inertia can also refer to the tendency of a person wanting to return to sleep.