Best thing I have used to quickly give me some quick allergy relief. Watery eyes, sniffling off and on stuffy nose off and on... which flares up when someone cuts the grass. I really like this better than 24hour type allergy (way more expensive pill). This tablet gives you relief and you can take another dose through out the day if it flares up again. I think this gives me better relief, once I am stable and feeling better , I can then proactively take the preventative 24hr allergy tablet.