What Causes Sudden Gain In Body Weight While On Pamelor?

Hi, I was diagnosed with Fibromyalgia in 2000, so 16 years ago. My neurologist has helped me stay functional with various medications over the years, with more or less success. Recently, she put me on Pamelor (Noritryptiline) 75 mg at bedtime, she said to help curb next-day pain and at the same time took me off Trazodone (which was originally recommended for sleep improvement). I m suddenly gaining weight very quickly, which is (only one) reason I couldn t take Lyrica. Is Pamelor known to cause rapid weight gain? And if so, what would you recommend instead? (looking for 2nd opinion) I am female, 55 and used to be energetic and very slender...thank you. Also wondering about Savella, which I recently heard can be recommended for Fibro, but one I haven t tried yet. Edit: Never mind, thanks. I ve already paid for this service before and didn t get any help.