Drug-Induced Pemphigus Medication
- Author: Diane M Scott, MD; Chief Editor: Dirk M Elston, MD more...
Medication Summary
For patients in whom the disease does not resolve upon withdrawal of the offending agent, medical therapy is necessary. Generally, systemic corticosteroids or other immunosuppressants are required. Anecdotal reports support the use of alternate immunomodulating agents (eg, antimalarial drugs, rituximab, intravenous immunoglobulin, mycophenolate mofetil). Recent reports suggest targeting cholinergic drugs as antiacantholytic therapy for idiopathic pemphigus.
Corticosteroids
Class Summary
Systemic corticosteroids (eg, prednisone) should be initiated in patients with disease that persists after the implicated agent has been discontinued. Since most cases of drug-induced pemphigus involve an immune mechanism, the anti-inflammatory and immune modulating properties of corticosteroids are beneficial. In idiopathic pemphigus vulgaris and pemphigus foliaceus, high doses of systemic corticosteroids may be needed. This also may be necessary for cases of drug-induced pemphigus.
Prednisone (Deltasone, Orasone, Sterapred)
Initial DOC for severe or recalcitrant cases of drug-induced pemphigus. Immunosuppressant for treatment of autoimmune disorders; may decrease inflammation by reversing increased capillary permeability and suppressing PMN activity. Stabilizes lysosomal membranes and suppresses lymphocytes and antibody production. Up-regulates keratinocyte adhesion molecules desmoglein 1 and 3.
Immunosuppressants
Class Summary
For patients who do not respond to moderate doses of systemic steroids or for patients in whom steroids are contraindicated. Also used as steroid-sparing agents.
Azathioprine (Imuran)
Antagonizes purine metabolism and inhibits synthesis of DNA, RNA, and proteins. May decrease proliferation of immune cells, which results in lower autoimmune activity. Useful in steroid-resistant patients. Less toxic than some other immunosuppressants. Generally, used in conjunction with low doses of systemic corticosteroids.
Prior measurement of thiopurine methyltransferase (TPMT) levels can be useful in guiding initial dose.
Cyclophosphamide (Cytoxan, Neosar)
Chemically related to nitrogen mustards. As an alkylating agent, the mechanism of action of the active metabolites may involve cross-linking of DNA, which may interfere with growth of normal and neoplastic cells. Effective in treating pemphigus; however, this drug also is very toxic.
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