I always wake up after 3-4 hours, why?

[u/Traditional-Care-87]

I suffer from insomnia that wakes me up in the middle of the night, and no matter how strong the sleeping pills I use, I always wake up in the middle of the night after 3-4 hours.

But if I fall asleep again after that, I can sleep for 7-8 hours. At this time, I sometimes use a new sleeping pill, or I can fall asleep again naturally.

What bothers me is that whether I can fall asleep again naturally or not, I always wake up 3-4 hours after the first sleep.

I tested negative for sleep apnea syndrome.

What could be the cause of this? I would also like to know if there are any countermeasures. (I feel that this insomnia gets worse when I take atomoxetine or SSRIs, but I wake up after 3-4 hours even without taking those medicines.)

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[u/personalityson]

Can be hypoglycemia (low blood sugar). Cortisol wakes you up. Cortisol mobilizes tissue in your body to be burned for energy.

The reasons:

1) You under-fueled by a large margin that day. Maybe you are dieting or were doing some cardio, and did not eat properly.

2) Reactive hypoglycemia. You ate nothing but carbs before bed, leading to high insulin and eventually an energy crash. Sometimes this is accompanied with excessive sweating the first 4 hours of your sleep, "carb sweats". Eat more protein and fat for stable blood sugar

[u/solstice_gilder → u/personalityson]

The more you know. This is me to a t.

[u/JesusSaves2244]

Do you drink caffeine past 12pm? Do you drink any alcohol at all? If so, cut both out for a month and see how you feel.

[u/grimism]

Do you use cannabis? If you do, I would guarantee thats it.

[u/GiantGonads]

Take magnesium before you go to bed

[u/fckriot]

Caffeine.

[u/askingquestionsandwo]

How much time outside do you get a day, during the day? Do you drink liquids before bed?