Nortriptyline
"Well, it's been about 8 months now since being prescribed 10 mg Nortriptyline HCL.
I take it once a day before bed. 
I also take Dicetel 50 mg up to 3 X a day although most days I don't even feel the need to take it. 
It does help though when I take it. Before meals. 
I've had IBS for close to 20 years. I was ALWAYS afraid to go out to eat. I'd always make reasons to get out of going out with friends. 
It literally ran my life 
I've felt better since the start and wish I've been given this years ago. 
This has 98% worked for me & I would suggest it to anyone to try it!

Good luck"