This seems very familiar. I am not sure if it was you but I can remember reading a post where someone said they experienced that with Instant sexiness/B and I asked them to continue testing to make sure.
I use both Instant sexiness/ A and B and have both TAH and TAL and never experienced drowsiness.
I am glad you posted this and am pretty sure if you experienced it someone else has as well and this is something we really need to be aware of.
Correction, the Instant sexiness made the person super hyper and restless. This is why I love reminding our forum posters that you should never rely on someone’s findings when testing out the products because there is always something new you can find out.