https://www.researchprojecttopics.com/2017/09/13/screening-new-drug-antihistaminic-effect-comparison-pa2-known-histamine-receptor-antagonist-mepyramine-bdf-8503/
Screening Of A New Drug Bdf 8503 For Any Antihistaminic Effect: Comparison Of The Pa2 Of A Known Histamine Receptor Antagonist, Mepyramine, With That Of Bdf 8503