For patients with dermatitis herpetiformis (DH), a strict and lifelong gluten-free diet (GFD) is the established first-line intervention. When this dietary approach does not achieve adequate clinical improvement of the skin manifestation, a defined next-line protocol applies.

Prior treatment — insufficient response

A strict and lifelong gluten-free diet is the initial treatment for all DH patients. When the expected goal — clinical improvement and response of the skin manifestation — is not reached despite dietary adherence, escalation is indicated. This protocol addresses that situation.

Next-line approach

When the gluten-free diet alone is insufficient, adding dapsone to the ongoing dietary regimen is the indicated next step. Specific considerations — including how to approach severe skin involvement, patient-specific factors, and when and how to adjust therapy after remission — are detailed in the full protocol.

Treatment goals

The target is clinical response and remission of the skin manifestation, with ongoing reassessment to determine whether therapy can be reduced or discontinued over time.

References

DOI: 10.1111/jdv.17183

Dapsone therapy is recommended in the following clinical situations:
In case of severe skin involvement and extreme pruritus, higher starting doses may be considered, if a G6PDH deficiency can be excluded.
After clinical remission is reached, the dose should be lowered to the minimum maintenance dose.
Consider to reduce or stop dapsone.
If no response can be detected within 1 week at a daily dose of ≥150 mg, the diagnosis should be reconfirmed or a change to a different therapy considered.

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Dermatitis Herpetiformis When Gluten-Free Diet Fails to Control Skin Disease

References