i noticed that my husbands prescription is a little different from what he has been taking. He had been taking Carbdopa 50 - Levodopa 200. The bottle we got a few days ago shows Carb 50/Entacapone 200 / Levodopa 200. What exactly is entacapone. He seems to be much more sleepy than on the previous drug. Should i check with his doctor or pharmacist to see if in fact it was changed? Thank you.