Weight problems

I am currently gaining weight. The only drugs that I am on different from my normal thyroid and hormones are Minocycline and Effexor XR, which I am now taking 37.5 to get off of.  Does Minocyline cause weight gain.  I am hypothyroid, but my last test several months back were normal.  I exercise very regularly, but still can't lose weight and now am gaining rapidly.  

[kitty9309]

Is your TSH low enough?

Being in the normal range of the lab is not enough after you start on thyroid meds. The TSH is usually best around a 1.