I've had great success with rhodiola. It's great for energy and focus. I've tried numerous brands in an attempt to find the one that worked the best, and they all affect me differently. So don't give up if it doesn't work for you, you may just need a different brand. The bad part is after 4 weeks or so the effects started becoming less apparent. This is why one should take a break every now and then. For me, herbs like rhodiola, ashagawanda, and gotu kola have worked better than any prescription medicine.
Tell us the dosage you used and send me a pm with the name of the brand please. Thank you