Carrots are rich in carotenes, which are substances related to vitamin A. They're found in the orange pigments and are good for you, but, if you eat lots and lots of carrots, you can develop a yellowish or orange cast to your skin. It's mostly noticeable on the soles of your feet and the palms of your hands.
Benadryl is another decongestant safe for use in cats, although it is usually not as effective as chlortrimeton in treating congestion. Benadryl is generally more beneficial with treating snake bites, reactions to vaccinations, itching, and insect bites.
Prescription Meds. Metoclopramide is a prescription medication that treats acid reflux and nausea in humans. Commercial names include Reglan, Maxolon and Octamide. Vets use metoclopramide to calm cats' stomachs and to get things such as food or hairballs moving out of the tummy and on their way through the intestines.