Hay fever, antihistamines and the evidence on dementia risk

By Eef Hogervorst, Professor of Biological Psychology, Loughborough University

For millions of people around the world, pollen season means weeks of sneezing, itchy eyes and a blocked or runny nose. The timing varies depending on where you live and which plants are in flower, but grass pollen is one of the most common triggers.

Hay fever, also known as seasonal allergic rhinitis, is an allergic reaction to airborne pollen. Many people manage their symptoms with antihistamines bought from a pharmacy. But recent headlines have raised a worrying question: could some of the medicines used…

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