An over-the-counter nasal spray shows promise for preventing COVID-19, a new study found.

Azelastine nasal spray is a common antihistamine used to treat symptoms of seasonal allergies, including runny nose, sneezing and watery eyes. Previous research has shown that azelastine may offer some protection against COVID-19 and respiratory syncytial virus , an infection that affects the lungs and is especially dangerous for children. MORE: Young children with ADHD are being medicated too quickly, study says

The new study, published Tuesday in JAMA Internal Medicine , offered further evidence that azelastine may be a safe and effective prophylactic measure against COVID. But researchers warned that it should not be seen as a replacement for COVID vaccines.

The study including 450 pe

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