Is It Advisable To Change From Gabapentin To Amitriptyline?

my mom was taking one 100mgr gabapentin 3 times a day but wants to stop and go back to taking one 25mgr amitriptyline at bedtime she said it helped her neck and legpain aand helped her sleep she also has atrofib and heart failure do you think it would be ok to take the amitriptyline tonight