Would be easier if you said "M/F" ; over or under 50...
Do you just wake up, or do you wake up to go to the bathroom? Do you live in an urban or rural area? Have there been any changes in your environment, such as a new road or a data center?
Have you checked your blood sugar recently? Your prostate? (hence the m/f?)
There are many ridiculous beliefs that lead many people to take drugs to help them sleep. Waking up during the night isn't necessarily a sign of a health issue, quite the contrary.
It is important to remember that in the preindustrial era, when there was little artificial lighting, the norm was a two or three phase sleep pattern. People spoke of a “second sleep.” There were social activities in the middle of the night. Artisans were working. Some renowned authors and scholars of the Middle Ages and the Enlightenment wrote in the middle of the night and have testified to this.
So, you may very well have had a good sleep in the first part of the night, and your body had gotten enough at that point.
A little reading, doing the accounts, polishing your shoes, batch cooking, stargazing… a small, pleasant or boring activity, and then you go back to bed for one or two sleep cycles.
Add a 10 to 20 minute nap after lunch, and you’ll be in top form.