Beconase Allergy & Hayfever 12 hour (beclomethasone dipropionate) Beconase Allergy & Hayfever 12 hour is a twice daily spray that gives you highly effective allergy and hayfever treatment and prevention. For relief from:Ê ¥Sneezing ¥Itchy nose ¥Runny nose ¥Nasal congestion Beconase Allergy & Hayfever 12 hour is non drowsy and can be used before the onset of symptoms to help prevent allergy & hayfever occurring.