Methotrexate use in allergic contact dermatitis: a retrospective study.

Area of Science:

• Dermatology
• Immunology
• Pharmacology

Background:

• Methotrexate is a folate antimetabolite used for atopic dermatitis and psoriasis.
• Limited data exist on methotrexate's efficacy for allergic contact dermatitis.
• Allergic contact dermatitis often involves chronic allergen exposure.

Purpose of the Study:

• To evaluate methotrexate's efficacy and tolerability in treating allergic contact dermatitis.
• To assess methotrexate's effectiveness in patients with unavoidable allergen exposure.

Main Methods:

• Retrospective chart review of 32 patients with allergic contact dermatitis.
• Patients received methotrexate treatment between November 2010 and November 2014.
• A subgroup of 10 patients with occupational allergen exposure was analyzed.

Main Results:

• 78% of patients (25/32) showed partial or complete response to methotrexate.
• Efficacy was comparable in allergen non-avoiders (10/10 response).
• Complete clearance was achieved in 23% of patients (5/22).

Conclusions:

• Methotrexate is a well-tolerated and effective treatment for allergic contact dermatitis.
• It demonstrates robust efficacy even with persistent allergen exposure.
• Methotrexate is comparable to other immunomodulatory agents like cyclosporine and azathioprine.