The efficacy of Cyclosporin A(CyA) in the treatment of psoriasis is well recongized, the dosage less than 5mg/kg per day(mg/kg/d) is recommended.

The purpose of this study is to evaluate the indication, dose, course and side-effects of CyA therapy for psoriasis, especially in China.

Forty patients with psoriasis were treated with doses of CyA 5mg/kg/d, compared with 20 patients treated with Tigason lmg/kg/d by Global PAST.

1. Of 40 patients 33 patients (82.5%)were cured clinically in 4-5weeks and all the patients(100%) had responses to the therapy.

2. The efficacy and the Global PASI reduction of CyA therapy were significantly better than that of Tigason therapy.

3. During the CyA therapy, no severe side-effects and obvious laboratory changes were found.

CyA(5mg/kg/d) was satisfactory for psoriasis, especially for psoriasis pustulosa, arthropathica and erythroderma. CyA was found to be superior to Tigason. The therapy course and side-effects seemed to be related to the dosage.