The efficacy of Auto-Immune Buccal Urine Therapy (AIBUT) against allergic symptoms depends upon sublingual administration of the correct dose of urine as determined by bio-assay in individual patients. Succeeding effective turn-off doses occur at the troughs of a sinusoidal dose-response curve. Efficacy of the administered dose is confirmed by reduction in the severity and duration of Cold-water-induced Raynaud symptoms after administration of effective doses of unboiled urine in AIBUT. Boiled urine does not affect the Raynaud phenomenon.