Amitriptyline and Nortriptyline

I was wondering if any board members have been taking Amitriptyline or Nortriptyline for Depression and Anxiety? I have been on Zoloft for months but it hasn't been particularly helpful treating the Depression. My doctor has recommended Amitrip as an excellent antidepressant. I responded very well to another TCA called Clomipramine some years ago but it stopped working. My biggest concern are the side effects. He said expect to gain weight on the Amitrip. Has anyone had weight gain as a side effect but have been able to manage it with diet and exercise? I'm concerned that I won't be able to lose the possible weight even with a lifestyle change. Hair loss is also a concern but I don't know how common that is with this med. Nortriptyline is another option and is a metabolite of Amitrip but I don't know if its as effective or whether the chances of having the same side effects are pretty high.

Any personal experiences would be greatly appreciated!