A novel series of optionally substituted 4-oxo-4H-pyrido[1,2-a]pyrimidine-3-N-(1H-tetrazol-5-yl)carboxamides is provided for use as inhibitors of allergic reactions. The compounds exhibit antiallergy activity by both oral and parenteral routes of administration.
A novel series of optionally substituted 3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-ones is provided for use as inhibitors of allergic reactions. The compounds exhibit antiallergy activity by both oral and parenteral routes of administration.