Indoor Cat Foaming

So my sister's indoor cat has started foaming at the mouth. She started vomiting a couple days ago so we took her to the vet and he prescribed her 2 different antibiotics, an anti-inflammatory and a vitamin--three twice daily and one of the antibiotics once daily.  She foams a bit when she takes the antibiotics that should only be given once a day (I'm assuming because of the taste) but just now, as I'm writing this, when I entered the room we've been keeping her in she was already foaming. I hadn't given her  the second dose of her medicine, I was actually on my way to, but it's shaken me up. Should I still give her the dose? She's kinda walking around and rubbing her tongue to the roof of her mouth and foaming.

There's nothing in there she could have possibly eaten, I cleared the entire room since I know she tries to eat just about anything and everything. I actually took her to the vet a second time today because she had vomited again last night, he said she seemed fine, hadn't lost weight and was alert. Idk what could have changed in that time as she seems tired and disoriented now--she's holding herself low when she walks and "loafing" whenever she stops moving.

The vet actually suggested she might have a hairball blockage rather than food poisoning or an infection today. Could that be causing this? 

If it were my cat, and she was foaming right now, I would scoop her up and go back to the vet and ask him/her to look at it now.  Also mention the vomiting.  Better safe than sorry!  If you wait a few more hours, you may end up at the emergency vet and that can cost over $100 just to walk in the door and register.

Red Top Rescue said:

If it were my cat, and she was foaming right now, I would scoop her up and go back to the vet and ask him/her to look at it now.  Also mention the vomiting.  Better safe than sorry!  If you wait a few more hours, you may end up at the emergency vet and that can cost over $100 just to walk in the door and register.

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Agreed! The foaming, lipsmacking is often a sign of nausea. Best to have her checked out.

Is the antibiotic that makes her foam Metronidazole/Flagyl? If it's the liquid form, yes, it is absolutely horrible! This med does come in pill form, which is what I always request (can even get tablets compounded in small enough doses for most kittens.)

CatPack said:

Is the antibiotic that makes her foam Metronidazole/Flagyl? If it's the liquid form, yes, it is absolutely horrible! This med does come in pill form, which is what I always request (can even get tablets compounded in small enough doses for most kittens.)

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Ugh... Flagyl That particular medicine in liquid form does cause foaming and very cranky cats because it tastes horrible, even if flavoring is added to it. If you have the liquid version, ask the vet for the pill version. It'll be much easier to give. Make sure to use a Pill Pocket to hide the pill in and follow up the pill with some yummy canned food.

A second vet opinion seems like it is needed. If your cat seems to be getting worse, then a trip to the vet ER may be necessary.

My cat Maxx has had the pill form of flagyl. I hated to have to put it down his throat because it was 3 pills in the morning and 4 in the evening. Each pill was tiny and a low dose, so that's why he had to take a total of 7. I felt bad having to open his mouth 7 times a day for about a week. This time, he is on the liquid form which is flavored and needs to take it 2 times a day. At the moment, I am finding this a bit easier because after I dose him (as far back in his throat), I follow it up with a little bit of water and a few kitty treats. The first time he did foam because I wasn't fast enough with the water chaser, but now it seems to be easier. He still doesn't like it, but we are dealing. Each cat is different when it comes to giving medicine. Yes, he fights me with the liquid, but I find it less stressful for both of us. Now getting him to eat wet food is another story!