The efficacy of the calcium-channel blocker nicardipine in the treatment of Raynaud's phenomenon was assessed in a double-blind, randomised, crossover trial in 20 patients. Each patient received 2 weeks of nicardipine 20 mg three times daily and 2 weeks of placebo. Nicardipine significantly improved the frequency and severity of Raynaud's phenomenon. An open study during 2 months in 30 patients confirmed the effectiveness of nicardipine (20-40 mg 3 times daily). Side effects (headache, flushing, ankle oedema) were frequent but usually mild. We conclude that nicardipine is effective in the treatment of Raynaud's phenomenon.
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