Good stack with Ritalin?

I'd do things known to affect ADD, like fish oil and a good B-vitamin supplement, add a good choline source (Alpha GPC or Citicholine) and if all that doesn't sharpen you up enough, add a racetam or noopept.

Sunifiram will allow you to lower your dose by 7 to 10x. 1mg of methylphenidate with 10mg sunifiram would feel like 10mg methylphenidate alone. Or 1.5mg sunifiram nasal spray would be same as 10mg sunifiram taken sublingual. The focus and energy with this combo feels much cleaner when I tried it a few years back. Don't remember the duration as much. I did it with 10mg sublingual sunifiram and 1mg of ethylphenidate which is a slightly more powerful version of ritalin. With ethyl it was like doing 30mg of the ethyl alone but without the nasty sides.

I'd be wary of neurotoxic potentials with additional psychoactive compounds. Do your research thoroughly. Also, I said exercise because it floods your brain with NTs, and since MPD is a reuptake inhibitor, you should feel quite good with a clear mind after light cardio.

Doesn't matter. Any stimulant should be taken with theanine ''Able to cross the blood–brain barrier, theanine has reported psychoactive properties.[28] Theanine has been studied for its potential ability to reduce mental and physical stress,[29] improve cognition,[30] and boost mood and cognitive performance in a synergistic manner with caffeine.[31][32][33][34][35][36]Studies on test rats have shown even repeated, extremely high doses of theanine cause little to no harmful psychological or physical effects.[40] Theanine showed neuroprotective effects in one rat study.[41] Theanine has been reported to raise levels of brain serotonin, dopamine, and GABA, with possible improvement in specific memory and learning tasks.[52]'' from wikipedia