Well, some of it may be due to the calcifying of the pineal gland which produces melatonin when sunlight begins to fade at twilight. You need to help yourself boost melatonin by cutting off television and computers several hours before going to sleep. That gives the pineal gland (if it's still producing melatonin) time to manufacture melatonin in the presence of diffused lighting for restful sleep.

It is characteristic of aging that sleep becomes somewhat more sporadic. You help it along with diet, exercise, CPAP (constant positive air pressure) application if sleep apnea tests show you need it. If you take afternoon naps, you should be tested to determine if you do have sleep apnea.

Medications? Clonazepam (Klonopin) .5 mg when needed only; aspirin . An antihistamine prescribed by a doctor such as Xyzal 5 mg is very helpful (pronounced ziezal).

Other than the suggestions I've already listed, I don't know what else might help.

The best help for me has been CPAP therapy because I was missing some REM sleep at night and consequently not getting sufficient oxygen. Your body naturally adjusts to the CPAP over 30 to 60 days, and you feel rested and relaxed in the morning. It's better than any medication, frankly. And you don't have periods of 3-4 hours of sleep and then suddenly become fully awake.

Histamine will interfere with ability to sleep. Medication intolerance can be a problem there (or unidentified allergies)

Frankly, it's a search that each person must go on to find the things that are making sleep at night difficult.

I hope you find the things you need to help.