I was also told to take the Synthroid in the am and
Prilosec in pm. I had not considered
Prilosec as a possible reason, but I had noticed that my temp. had gone down and I felt the need for more thyroid. When I understood the need to check free T3 and the doctor checked it, I found that I was not converting T4 to T3 very well. So starting 4 days ago, I was switched to a T4/T3 type of med.---Armour thyroid. I felt better after the very first day and now I feel great.