Treatment of Neuropathic Pruritus

Initial Diagnostic Approach

Patients with suspected neuropathic pruritus should undergo targeted investigation only when clinically indicated, following a detailed history and examination, according to the British Journal of Dermatology guidelines 1, 2, 3
Skin biopsy may be considered to confirm small fiber neuropathy if suspected, though this is optional and not routinely required, as recommended by the British Journal of Dermatology 1, 2, 3

The British Journal of Dermatology recommends gabapentin 300-1200 mg daily as the primary systemic treatment for neuropathic pruritus 1, 4
Doxepin may be used as a topical agent, with a maximum of 12 g daily for up to 8 days, and 10% body surface area, as suggested by the British Journal of Dermatology and Praxis Medical Insights 4, 5
Gabapentin is specifically indicated for neuropathic causes, but not for hepatic pruritus, which has a different mechanism, according to the British Journal of Dermatology and Praxis Medical Insights 4, 5

The British Journal of Dermatology recommends incorporating behavioral interventions, including education, relaxation techniques, cognitive restructuring, and habit reversal training, for distressed patients 6, 7
Patient support groups and referral to liaison psychiatry or psychology may be beneficial, as suggested by the British Journal of Dermatology 6, 7
Chronic neuropathic pruritus can significantly impair quality of life and cause psychosocial morbidity in up to one-third of patients, according to the British Journal of Dermatology 7

Patients with suspected neuropathic pruritus should be referred to neurology or dermatology after initial history, examination, and basic investigations, as recommended by the British Journal of Dermatology 1, 2, 3

The British Journal of Dermatology recommends referring patients to a specialist for neurological evaluation after basic history and examination to identify the underlying cause of neuropathic pruritus, which can arise from dysfunction anywhere along the sensory pathway, with targeted investigations guided by clinical findings 8

The British Journal of Dermatology suggests pregabalin as an alternative anticonvulsant option if gabapentin is not tolerated, with a strength of evidence of D recommendations 9
The British Journal of Dermatology recommends considering SSRIs, such as paroxetine or fluvoxamine, or mirtazapine if gabapentin or pregabalin fail or are not tolerated, with a strength of evidence of D recommendations 9
The British Journal of Dermatology suggests naltrexone or other opioid receptor modulators may be tried if gabapentin or pregabalin fail or are not tolerated, with a strength of evidence of D recommendations 9

The British Journal of Dermatology recommends incorporating behavioral interventions, including education on trigger avoidance, relaxation techniques, cognitive restructuring, and habit reversal training for distressed patients, as well as patient support groups 8
The British Journal of Dermatology suggests referral to liaison psychiatry or psychology may help, as chronic neuropathic pruritus causes significant psychosocial morbidity in up to one-third of patients 8
The British Journal of Dermatology recommends phototherapy, such as NB-UVB, may provide symptomatic relief in some cases 9