Amitriptyline dosages have been all over the map. Some have been on very low doses (10 mgs), some on 25 mgs and some on much higher doses.

The better question might be: What is the objective of being prescribed amitriptyline? For some, it is head aches and insomnia (usually a low dose). Some it is for anxiety and depression ( higher doses ).

So comparing is fraught with questions.