I used to have allergies really bad. I had a runny and stuffy nose and couldn't breath at night. I got a sinus infection every 3 months. Then my doctor put me on Zyrtec. I got this Kirland's brand for an awesome deal at Costco. It was SO much cheaper than the name brand (plus it was a bottle of 365 so lasted an entire year!). I always use generics if I can. This stuff worked great. It helped to clear me up and helped me function. The reason I'm giving this a 7 is because it also made me very tired. I could barely keep my eyes open every day even when taking it before bed. My doctor told me to cut the pills in half so I began doing that and only taking half a dose every day. That definitely seemed to help and I wasn't quite as tired. I would recommend these. Especially since they are the generics and much cheaper but still as effective. Just take a half a pill a day if it makes you drowsy. These do work and help relieve my allergy symptoms.