My friend's son had a severe atopi for a long time.  As a last resort she went to a Han doctor and gave him a prescribed medication by the doctor (han-yak).  Amazingly the atopi is all gone and completely cleared, but he now has a weight problem.   The mom says that eversince his son drank this medicaiton he started to gain weight.

He is only  9, but he is big and fat as a high school kid. 

I have the same problem with my son who has severe eczema, but I afraid to give him han-yak for the possibility of gaining that much weight.  Can you tell me what kind of medication this could possibly be?