How Long After Convenia Until Cat Pees Normally?

By Jen Davis

A urinary tract infection can cause your cat to experience difficult, frequent or painful urination as well as blood in the urine. In some cases, a cat with a urinary tract infection may not be able to urinate at all. If left untreated or not treated properly, a urinary tract infection can be a serious health problem with long-term consequences, including death. Your veterinarian may prescribe Convenia if he believes your cat has a urinary tract infection.

Basic Information about Convenia

Convenia is a single-dose broad spectrum antibiotic treatment that is manufactured by Pfizer. It is commonly used to treat an assortment of different ailments in pets. It is often used for treating urinary tract infections in cats. The primary benefit of a Convenia injection is that the animal will typically only need to be medicated once and the veterinarian can do it before the animal leaves the clinic where she was diagnosed. This eliminates the need for the owner to medicate the pet at home.


A single injection of Convenia can provide a full-course antibiotic treatment and is the equivalent of 14 days of antibiotics. Depending on the severity of your cat's urinary tract infection, you may notice immediate improvement in her urination or it may take several days before you notice a difference. In most cases, you should notice a marked improvement by day 10 after the Convenia injection. If your cat is not peeing normally after 14 days, take her back to the veterinarian for further treatment. It is best to ask your veterinarian how soon he expects to see results in your pet at the time that he administers the initial injection.


It is crucial to monitor your cat's urination after Convenia is given in order to be certain the antibiotic is effective in treating your pet. Keep your cat contained in an area where you will be able to see that the specific animal is urinating, how much she is urinating and the color and consistency of the urine. Ideally, you should keep your cat indoors with her own litter box while she is receiving treatment and recovering from a urinary tract infection.

Problems and Concerns

There are several potential problems to be aware of before you treat your cat with Convenia. Because the drug is administered in a single dose, you cannot stop treatment if your animal has a negative reaction to the medicine. Potential side effects include diarrhea, lethargy, anorexia and even potentially severe anaphylactic reactions. Some of these reactions require additional veterinary care and may even be fatal. This is a real concern because a pet that has a bad reaction to an oral antibiotic can simply be taken off the antibiotic, but it is impossible to reverse a Convenia treatment once the drug has been injected.