That may contribute to waking up in the middle of the night.
If you frequently wake after drinking alcohol, consider whether there is a pattern.
The connection may be easier to notice if you keep track of your sleep and evening habits for several days.
Caffeine Can Stay in Your System
Caffeine is another possible contributor.
Coffee, tea, energy drinks, cola, chocolate, and certain medications can contain caffeine.
Caffeine’s effects can last for several hours, and people vary considerably in how sensitive they are to it.
Someone who drinks coffee late in the afternoon may have no trouble falling asleep but still experience lighter or more fragmented sleep during the night.
If you’re waking frequently, experiment with limiting caffeine later in the day and see whether your sleep changes.
Your Evening Routine Can Make a Difference
What you do during the hours before bedtime can influence your sleep.
A stimulating television program, intense work, heavy exercise immediately before bed, large meals, alcohol, or prolonged phone use may affect some people’s ability to sleep comfortably.