I have looked extensively and as best I can tell, you can not get ephedrine based medications here. I even had a friendly pharmacist let me look through the “big-book-of-everything-he-can-order”
Just avoid Ephedrine at all costs, I got addicted to it and it almost killed me. There are various dietary changes you could make to boost energy; lots of lean meats, green leafy veg and nuts. You can try by eating little and often, that really works at maintaining a regular burn of energy and is good if your metabolism is slow (which can explain lethargy) also exercise more.
High doses of caffeine crash your blood sugar levels making you over-eat, and actually makes you more tired in the long run because replenishing your energy levels after a crash requires rest.