I have been a lifelong seasonal allergy sufferer, and growing up I probably tried every OTC allergy medication that existed. Allegra, Zyretc, Claritin...I have tried them all. Claritin Reditabs 24 hour allergy medicine seems like a good idea, and I like the fact that they are 24 hours, where some allergy medicines are just for 12 hours - meaning you need to take 2 per day. But, for some reason, they just don't work for me. I have given Claritin numerous tries throughout the years, hoping that maybe as I got older they would suddenly work - but unfortunately, no. I suffer from seasonal allergies in the fall - or, HayFever. So usually starting in August I have itchy watery eyes, sneezing, stuffed up nose, etc. While Claritin might give me slight relief, it doesn't take away the majority of my symptoms. Also, for this product to truly be effective I think you need to use it continuously, meaning for several days in a row before you can notice any type of improvement. Overall, I'm sure this works for a lot of people. My husband loves it. But for me, I have just never really had good luck.