Petco Text Logo
Petco Pet Logo

My cat has URI, congested, mouth breathing. What helps & is drooling from Doxycycline?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | unneutered | 6 months and 25 days old | 12 lbs

Hi, my cat tig, 7mo old, has been diagnosed with a upper respiratory infection. His appetite seems to be normal, however he seems super congested and has to take breaths through his mouth, is there anything I can do to help besides a steamy shower or humidifier? He also drools randomly and a lot at once, could that be a side effect from the antibiotic doxycycline?

1 Answer

Most Helpful Answer

Image profile

Answered By Rodrigo Roca, DVM

Veterinarian

Published on January 26th, 2019

Hello, sorry to hear about Tig. You can try to wipe his nose often and make sure the air is humidified majority of the time. Most often the signs can last up to 5 days and then improve. In regards to the drooling, yes Doxycycline may cause nausea and vomitng which can present as excessive drooling. Additionally in cats, doxycycline can cause esophageal changes, so make sure when administering this medication you are chasing it with plenty of water. Give him the medications before or after a large meal to limit his GI signs. Hope this helps and best of luck.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored