Prevalin? Allergy is a breakthrough hayfever treatment that acts 5x faster than hayfever tablets. Prevalin? Allergy?s unique formula gets to work in just 3 minutes, making it effective right at the onset of symptoms. Relieves the main Hayfever symptoms: Sneezing - Runny nose - Blocked nose - Itchy/watery eyes. Prevalin? Allergy is effective for Hayfever and for all year round allergies such as dust mite and pet allergies. Prevalin? Allergy is non-drowsy and does not contain antihistamine or corticosteroids, making it even suitable for pregnant or breastfeeding women, athletes and the elderly. Prevalin? Allergy is a breakthrough hayfever treatment that acts 5x faster than hayfever tablets. Prevalin? Allergy?s unique formula gets to work in just 3 minutes, making it effective right at the onset of symptoms. Relieves the main Hayfever symptoms: Sneezing - Runny nose - Blocked nose - Itchy/watery eyes. Prevalin? Allergy is effective for Hayfever and for all year round allergies such as dust mite and pet allergies. Prevalin? Allergy is non-drowsy and does not contain antihistamine or corticosteroids, making it even suitable for pregnant or breastfeeding women, athletes and the elderly.