Never take any drugs at all, EVER!
If you have muscle soreness, rest them. Or do light weights next time around. I am assuming you have different focus each day so these sore muscles should get at least 1 or 2 days rest even if you are in the gym every day. if back to that muscle and they are still sore, do more stretches and light weights, low reps until they are good again.
If sore for more than 1 day, look at your diet and intake protein and veges to feed them so they recover quicker. Even eletrolyte drinks like Endura.