Could Change To Levothyroxine From Eltroxin Cause Weight Gain And Hair Loss?

I had two strokes in October last year. Before that, I had been on Eltroxin , at the same dose, for several years. When I was in the hospital for the stokes, I was changed to levothyroxine without my knowledge. That said, though, I was unable to be in charge of my meds until this week. My question is, would the change in prescription be the cause of 1, my weight gain, and 2, moderately severe hair loss. The wight gain is about 10 pounds and the hair loss bad enough that my regular hair dress commented on it the first time I was able to get back to her last week. You should also know that I have type 1 diabetes for 45 years, on insulin pump for thirty years. I also have severe asthma. Could the change in my thyroid med cause the hair loss and weight gain. I was not paralyzed by my strokes.