Weight gain is not a side effect of Thyronorm
Since your TSH
is a little high, it is likely that your weight gain is because your hypothyroidism
is not being adequately corrected. Your current dose of Thyronorm (25 mcg) may not be sufficient to treat your hypothyroidism.
I would advise you to visit your doctor. He/she may give you a prescription for a higher dose of Thyronorm.
Hope I have answered your query.