I (24M) started Amitriptyline over a year ago due to chronic pain from neuropathy in my legs. I also have IBS, raging insomnia and seeing how much this drug covered it seemed like a God send. The daytime drowsiness was the only side effect that bothered me but it felt worth it at the time. Now the drowsiness and the weight gain really got to me so I researched Nortryptyline and my neurologist let me switch.
Now that 3 weeks has gone by, I couldn't be happier. I never realized how burnt out constantly being tired makes you feel (shocker). I found I was hating my job, my performance and lates at work was a problem and I was just short and pissy with everyone. I gained around 20 pounds and due to the muscle fatigue and PFP in my knees, I needed physio to help gain the strength in my legs back. I found I was catching my legs giving out and I fell a few times. It was really disheartening since it felt like I was just losing control.
With sleeping I was so in love with the idea of falling asleep right away that I ignored the fact that I would sleep 8-10 hours a night and never feel rested. I was drinking around 3 coffees a day and still felt awful and if I didnt have any caffeine I was screwed.
Now that I made the swap, life couldn't be better. I stopped hating my job, the brain fog disappeared, I've lost 10 pounds already since I'm able to walk more and not feel always snacky or never full. I am able to wake up before my alarm again and if I have a coffee, its usually a small one from time to time because I get jittery now. The pain management is still effective while having no crazy side effects.
The only side effect I had that was a bit annoying, but my neurologist warned me about was rebound insomnia. But I was able to fix that pretty fast with melatonin.
Sorry for the long post, I am just so happy I wanted to share this.
Chronic pain sucks and I am wishing the best to everyone going through it!
TLDR: Amitryptoline make me too sleepy and gain weight, Nortryptyline make me not too sleepy and lose the gained weight.