Amitriptyline Dosage for Paresthesic Meralgia

Introduction to Treatment

The National Comprehensive Cancer Network recommends amitriptyline as a treatment for paresthesic meralgia, with a dosage of 10-25 mg at bedtime, gradually increased every 3-7 days to 25-150 mg at bedtime, as tolerated 1
Amitriptyline is a tricyclic antidepressant that acts by inhibiting the reuptake of serotonin and norepinephrine, and blocking sodium channels necessary for neuronal impulse conduction, with its analgesic efficacy being independent of its antidepressant activity 2, 3, 4, 5

The initial dose of amitriptyline should be 10-25 mg at bedtime, with gradual increases every 3-7 days as tolerated 1
The target dose of amitriptyline is 25-150 mg at bedtime 1
The analgesic effect of amitriptyline typically appears more rapidly than its antidepressant effect 1

Nortriptyline, a secondary tricyclic antidepressant, has a superior side effect profile compared to amitriptyline while maintaining similar efficacy, with a recommended dose of 10-25 mg at bedtime, increased every 3-7 days to 25-100 mg at bedtime 6, 1

Amitriptyline should be considered after failure of first-line treatments, including gabapentine and pregabaline, and in cases of concomitant insomnia due to its sedative properties 1
The American College of Physicians recommends considering amitriptyline as a combination therapy with an opioid for the neuropathic component of pain 1

Anticholinergic side effects, such as dry mouth, constipation, sedation, and urinary retention, are more frequent with amitriptyline than with nortriptyline 6, 1

A therapeutic trial of 3-4 months is recommended before considering treatment failure, according to the Mayo Clinic Proceedings 2, 3, 4, 5
Once a response is obtained and pain relief is maintained, the dose can be gradually reduced to the minimum effective dose 6