Why do I have trouble sleeping after drinking?

It depends on what you're drinking. If you had something with caffeine (eg. coke, coffee, or anything with sugar) then you will be kept awake because the caffeine works quickly. If you want to drink something right before bed, water and plain milk are relaxing to have and don't contain much sugar or any caffeine.

Drinking dehydrates you,resulting in muscle cramps and excessive thirst that may be the problem. Passing out from drinking will not result in deep REM sleep which what is needed for a restful night's sleep.

Sometimes alcohol, just as caffeine, can just keep you awake in ways you wish it did not. The alcohol makes your body alive, and it can cause to have some trouble sleeping. Alcohol also can make your mind think, and wander, which can keep you tossing and turning at night.

Your brain could be trying to process what's going on as it gets confused after consuming alcohol, the wires in your brain get all tangled and it could be focusing on trying to cope with the effect the alcohol has caused

Caffeine and alcohol can cause problems within in your body if you're drinking in the late evening. You should try other drinks instead like tea or milk is what I've also seen some people say helps.

If you are referring to alcohol, it contains a lot of sugar. This may be the cause of your inability to power down.

I don't usually drink and when I do is with extreme caution. Since I'm on medication for my treatment, I can't, but that doesn't bother me =)

You may have trouble tleeping because you are experiencing a buzz or the effects of being drunk. Try drinking small quantities of alcohol and see if your sleep improves. Knowing your BAC (Blood Alcohol Capacity) may help you determine what is a healthy amount of alcohol to consume. You may sleep better if you do not drink alcohol by itself. When I drink, I alternate sips of alcohol with water and eat food every few minutes to fifteen or so minutes. This can help lessen the effects of alcohol and is safer than drinking on an empty stomach. Lastly, do not drink close to bed time and regulate when you wake up and sleep each day. Routine could also be a factor.

when ethanol is metabolized (after 4 to 6 hours) normal deep sleep is disputed. Sometime is hard to return to sleep, or there is not enough time to do so before the alarm clock rings. The body is dehydrated, but the bladder is probably full, and this requires a trip to the bathroom.

Alcohol is well known to both decrease the quality and length of your sleep. It's a common myth that a drink before bed can help with sleep, but that is simply untrue.