Wasir 1983.

Methods	Double‐blind randomised controlled trial
Participants	52 patients with primary or secondary Raynaud's phenomenon
Interventions	Intra‐arterial reserpine injection or sublingually administered nifedipine, orally administered trifluoperazine or dipyridamole, weekly on a long‐term basis
Outcomes	Besides the usual biochemical and immunological investigations, special tests including skin temperature, recovery time after a cold stress test, measurement of digital blood flow by strain‐gauge digital plethysmography, and radioisotopically determined glomerular filtration rate. Digital blood flow and skin temperature recovery times studied after 45 minutes, 2 hours, 6 hours, and 24 hours of intra‐arterial reserpine injection or sublingually administered nifedipine, orally administered trifluoperazine or dipyridamole; and weekly on a long‐term basis Raynaud's frequency, severity, and duration of attacks
Notes	Abstract only; data unavailable