Why Does My Cat Foam at the Mouth After Taking Medicine?

It can be alarming to see your cat drool foamy saliva right after a dose of medication. In most cases this is a normal defensive reaction rather than a medical emergency. Cat medicines are usually bitter and lack the sugar coating found on many human pills, so the unpleasant taste alone can trigger gagging and vomiting. Some drugs are also physically irritating to the stomach lining, especially when given on an empty stomach. Understanding the two main causes—bitterness and gastric irritation—helps you give medicine more comfortably and know when foaming is simply a passing reaction versus a sign you should slow down and check with your veterinarian.