> Caffeine no longer keeps me awake.
Reframe your question starting from this. You should not be needing caffeine to stay awake as a rule and normal baseline in your life. Solve that problem before thinking of starting with a stronger drug.
Reframe your question starting from this. You should not be needing caffeine to stay awake as a rule and normal baseline in your life. Solve that problem before thinking of starting with a stronger drug.
I used to drink about 3 liters of tea, daily, for years. And I slept just fine. Then I stopped drinking tea. If I have tea now, which is very rare, even early in the morning, I know a sleepless night is what's going to happen.