Why isn't my cat's respiratory infection improving with antibiotics?
A lot of times, respiratory infections in cats are caused by a virus, not bacteria, so antibiotics will be ineffective. I would keep giving them to Tofu as directed by your vet, and I can give you some things you can try at home to see if they help her. You can use these methods on your other cat as a well, and I'd take that cat into the vet for a check up this week. First, you can try starting her on an L-lysine supplement - this is an amino acid that has been shown to help the immune system fight off respiratory infections more effectively. Enisyl and Viralys are both good brands, and can be purchased over the counter without a prescription - just follow the dosing instructions on the label based on your cat's weight. If she's congested, you can also try using a humidifier or bringing her into the bathroom with the door closed while you take a hot shower - the steam and humidity help to break up congestion and temporarily relieve symptoms associated with respiratory infections. Best of luck, I hope this helps!
Updated on September 23rd, 2025