underactive thyroid
"My disabled brother was previously prescribed generic levothyroxine and brand name, Synthroid.  On both, he was basically in a continual state of lethargy to the point where he would fall asleep on the commode or at the dining table. Never heard of Tirosint until requesting help.  This medicine has been incredible.  No more lethargy and continuous sleeping during the day.  Family members have commented that he is more alert, engaged and seems to be happy.  They would be correct!"