Credit: McMaster University Hamilton, ON (April 6, 2021) - If you are one of the millions of people worldwide suffering from allergies, you may take an antihistamine pill to ward off hives, sneezing and watery eyes. But you may be taking your medications incorrectly, says Derek Chu, a McMaster University allergy expert and clinical scholar. "People need to rethink what they stock in their home cabinets as allergy medicines, what hospitals keep on formulary, and what policymakers recommend. The message needs to get out. This publication is on time for the spring allergy season and as COVID vaccines roll out, for which rashes are common and antihistamines can be helpful," said Chu.