I've taken 240mg of Ginkgo with no side effects.
Ashwagandha, same brand, I found it quite stabilizing. It made me feel warm and happy and intelligent. I also took 3x that. I do have ADHD, so this may be the reverse-effect phenomenon. It was not that stimulating, but it was rejuvenating. I've taken it mid-day with these effects. When taken before bed, I had no trouble getting to sleep. One thing that prevented the combo from being too sedating (Gotu Kola, Ginkgo, Ashwagandha) was zinc. 12.5mg of zinc gave me my energy back and completed the combo for me. Give it a shot, if you can.
I take Gotu Kola before bed every night. 900mg whole herb. When it kicks in, your head sort of slows down and gets heavy. Takes 10 to 20 minutes. During the day, it prevents the urge to get up and do something else when I'm working.
Thanks for your feedback. I'm going to up my dose a little of the ginko and see where that gets me. I'm also thinking about upping my ashwaghanda, but I'm wondering at what point does it lose effectiveness. I'm looknig for the minimum effective dose. I feel that I may be able to get more out of it so I'm going to up it from 225mg to 550mg if I decide to do so. I may try the gotu kola at night as well, though I'm wondering since I don't have ADHD if it will effect me differently (i.e. speed me up versus slow me down). It doesn't have that effect on me during the day, but then again it could be subtle enough to keep me up at night? I'll have to experiment I supposed.