My Bengal is still fighting a stuffy head despite just about every treatment the vet can think of. She has recommended a childrens Zyrtec. He is a special cat who went into congestive heart failure after a routine steroid injection for skin allergies. Thus far every vet has been surprised about the CHF and no one had seen it in there practice. Some of these vets have been in practice for 25+ years. So, I am afraid he will have some sort of weird or deadly reaction to the Zyrtec as well. That being said, does any one have any experience with Zyrtec and cats? FYI, I am going to ask a pharmacist if this medication has any steroidal properties. Help!