Immunosuppressive agents in dermatology.

Azathioprine, cyclophosphamide, and cyclosporine are immunosuppressive agents commonly used by dermatologists. Azathioprine has a good safety profile and is preferred by most dermatologists for the treatment of bullous pemphigoid, cutaneous vasculitides, chronic eczematous dermatitides, and cutaneous manifestations of connective tissue diseases. For more fulminant diseases such as Wegener's granulomatosis, lymphomatoid granulomatosis, severe cases of systemic lupus erythematosus, or pemphigus, cyclophosphamide is more effective and its use is justified even though it is more toxic. Cyclosporine has been shown to be effective in a variety of dermatoses; the most promising results are seen in psoriasis, lichen planus, pyoderma gangrenosum, and chronic eczematous dermatitides. The long-term safety of cyclosporine remains to be determined, and it should be used judiciously with careful evaluation of the risk-benefit ratio in each case. Dermatologists who use immunosuppressive agents should be familiar with their indications, side effects, dosage, and monitoring.