I'm no herbalist so I'm afraid I can't help you, but I can say that you should be careful which herbs you use and what may have a reaction with any medication you're taking. You never know if something doesn't go well so it's usually best to never assume and do a little research when people give suggestions.
Again, I'm not a specialist, but maybe this medication isn't working for you? People usually don't suddenly feel perfect when taking medication, but if it makes you uncomfortable you can always ask if there's any other options.
On a basic energy manipulation level, I would recommend grounding the drowsy feelings you get as well as anything you'd like to move past, and probably centering your energy afterwards. I would also make sure you sleep well, eat food that gives energy, and drink a lot of water. Water usually helps wake me up, but everyone's different.
Anyways, hopefully I helped a bit. Good luck sweetie (: