Why did my cat vomit after Doxycycline? She's tired and not eating.

Question

My cat got prescribed Doxycycline Caps CMP DISPMED of 50mg/ml every 12 hours and I have been giving it to her since 10/22/18 and tonight around 8pm I gave her her medicine and an hour later she started to throw up about 3 times. Why did she throw up and what should I do? And she seems to be tired as well, and she hasn’t eaten much since yesterday. Pet's info: Cat | Mixed Breed | Female | spayed | 3 years old | 5.4 lbs

Makenzie Kurth, DVM · Accepted Answer

Thanks for using Petco Pet Education Center, formerly Petcoach. I’m so sorry to hear about Misty. If the medication had caused the vomiting, I would have expected it to cause vomiting days ago when you started it. That leads me to believe it is less likely related to the medication and more likely related to something else. That being said, double check that you are giving the correct amount and do shake the bottle well each time you give it. Just like in people, there are dozens of reasons vomiting occurs including: infection, dietary indiscretion (eating that piece of plant or human food, or dead mouse), GI foreign body (eating that hair band which is now causing problems), toxin, non specific nausea, diet change or new treat, and the list goes on. If it was just the three times in a row, I would just withhold food and water for 2 hours, then reinteoduce water. If she holds that down well, offer a small bit of food 8-12 hours after the last episode of vomiting. Don’t repeat tonight’s dose of medication. I am concerned in the back of my mind that something else is going on since her appetite had started decreasing. Is it related to the disease we are treating with the doxycycline or some other problem? Certainly if the vomiting continues or she is not ready to eat in the next 24 hours, or you see any new signs, please head to your vet or an emergency vet for re-valuation. Best wishes to you and Misty!

Why did my cat vomit after Doxycycline? She's tired and not eating.

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