1. Effect of ingested H1 antihistamines on methacholine challenge
Donald W. Cockcroft, MD, FRCP(C), FAAAAI, Beth E. Davis, PhD, Yeonju Roh, BSc, Joe-Ann Lourens, BSc 
Journal of Allergy and Clinical Immunology 
Volume 135, Issue 2, Pages (February 2015)
DOI: /j.jaci
Copyright © 2014 American Academy of Allergy, Asthma & Immunology Terms and Conditions

2. Fig 1
Methacholine PC20 before (left) and after (right) each treatment. The methacholine PC20 (mg/mL) is on the vertical axis (log scale) and the time points on the horizontal axis.
Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci )
Copyright © 2014 American Academy of Allergy, Asthma & Immunology Terms and Conditions