In this study, we aimed to compare the clinical effectiveness of highly-concentrated tacalcitol ointment daily versus intermittent application in patients with psoriasis vulgaris who simultaneously took a low dose of cyclosporin. All the patients in both groups showed significant improvements, and the patients in the intermittent application group obtained more patient satisfaction in cost performance. The treatment cost of low-dose cyclosporin and intermittent application of highly-concentrated tacalcitol ointment was less than half of that of high-dose cyclosporin and daily application of highly-concentrated tacalcitol ointment. This preliminary study suggests that the combination therapy with low-dose cyclosporin administration and intermittent application of highly-concentrated tacalcitol is effective, safe and provides acceptable costs for the treatment.