I've tried oxiracetam,adrafinil,phenibut,bromantane,tianeptine and a product similar to alpha brain called deep thought.
Oxiracetam- ups your focus for about 4 hours. Made nature appear extra beautiful. I would watch videos and notice things that have always been there but I paid no attention to. The first day I took this my son asked "how do plants breathe" and I had an answer.
Adrafinil-used to be a prescription drug for narcolepsy. Gives about 6-8 hours of super focus. Feels a lot like amphetamine without many of the negative side effects. I read a book on this and imagined it with incredible detail,like a movie playing in my brain.
Phenibut- this is an anti-anxiety med for russian astronauts originally. I must warn you it is powerful and addictive,so treat it with major respect. No more than 2 times per week usage and never 2 days in a row. That said,this is one of my favorites. Effects last about 14 hours. Nothing kills anxiety like this. It also doesn't make you sloppy like alcohol or Xanax. Makes you super creative and increases endurance. When I take this at work I outwork my co-workers by a large margin. combos well with caffeine.
Bromantane- a very unique russian drug. It is banned for athletes but totally legal. Gives a semi speedy brain effect and gives you a no nonsense disposition. but it's main perk is almost unlimted anaerobic endurance. First time I tried it I did a boxing workout and I can see why it's banned ,it gives you an unfair advantage. I threw nonstop power punches for several 3 minute rounds and was barely fatigued. This is basically powdered cardio!
Tianeptine - this is a new one for me ,I've been taking to relax after work. basically it's feeling is an energetic Zen mode. Feels very similar to loratab. Last about 2-3 hours.
Hope this helps broman.