I really like this brand. I feel it works fast and gives me the relief I need for a good long while. Cannot attest to 24 hours

I take a Zyrtec every night to help my allergies. Works well but I have to cycle my allergy medications every few months

My doctor perscribed Zyrtec when my allergies where really bad and it has improved them a lot since I have been taking the medication.

I had a constant runny nose and lot of coughing going on and since I've used Zyrtec this past month SOOO much better!!

I love this product for helping with my allergies, only try using water when taking this medicine...

I use Zyrtec as needed for seasonal allergies, I tried a bunch of different medications and this helped my symptoms the best!

you can feel the zyrtec start to take effect almost as soon as you take it.relief starts to come almost instanly

This works great at relieving seasonal allergies. Sadly the side effects it gives me prevents me from being able to use it anymore.

I have allergies year round. I use Zyrtec first thing every day. It helps me live a normal life, indoors and outside. Thank you Zyrtec!

My husband and I both suffer from seasonal allergies. Living in the South means that's almost year round so we keep Zyrtec handy at all times.