An allergic reaction to a dog or cat can cause sneezing ... Those medications include oral antihistamines like Zyrtec and Claritin, and nasal sprays like Flonase, Nasal Court and Azelastine.

I tried everything: a medication prescribed by my veterinarian specifically for dogs with motion sickness, over-the-counter antihistamines ... humans whose dogs (or cats) get carsick, these ...