Injectable Antibiotics for Cats: Pros and Cons

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Antibiotics are commonly prescribed to pets when they aren’t feeling well. But while you might immediately think of antibiotics that come in the form of pills or liquids, there is another option to be aware of.

If your cat is in need of antibiotics to combat an illness, your veterinarian might suggest an injectable antibiotic, such as Convenia. But before you agree to this treatment option, consider the pros and cons, some of which are outlined below. It turns out that, while antibiotic injections might certainly be beneficial, there are several reasons why some experts advocate against using them.

Generally, an antibiotic injection can be fast acting, which means it might help your pet feel better soon after she receives the shot. And one shot might be able to do the work of many days’ worth of antibiotics that would be given by mouth. So, you can see how this might be a convenient solution if your kitty is diagnosed with a condition that this type of medication is designed to treat.

One of the main reasons why antibiotic injections are so popular is because cats could be difficult to medicate when you have to give them oral antibiotics every day. Some cats might become agitated or downright aggressive when they’re being medicated, while others might feel frightened and hide as soon as they realize that it’s time to take their medicine.

To avoid stressing out your pet, and to reduce the risk of missing doses because you forgot to medicate your cat or your schedule got in the way, an injectable antibiotic can be given once at your vet’s office instead. A single injection of an antibiotic like Convenia is capable of working in your cat’s body for up to 14 days.

Another reason why some pet parents might prefer an antibiotic injection is because the veterinarian administers it. This means that, if it were the only medicine that your kitty needed, you wouldn’t have to worry about giving her any medications at home at all. Instead, you can let the single shot do its job.

Despite the convenience of injectable antibiotics for pets, there are some downsides to consider.

First off, as is the case with any medication, a cat may have an adverse reaction to the antibiotic. Or, if your pet is taking any other medications or supplements, the injection might adversely interact with them. In the case of an oral medication, if side effects occur, you could contact your vet, who would probably tell you to stop administering that medicine and, if necessary, bring the pet in for treatment to counteract the adverse effects. But when you’re dealing with an injection, it might not be possible to do that; the medicine is designed to be long lasting, so your vet might not be able to do much, if anything, about it. Also, the treatment required to help your cat recover from side effects might be costly.

According to experts, Convenia could remain in the body at sub-therapeutic levels for roughly 65 days after it has been administered. In other words, unlike oral antibiotics in pill or liquid form, this injectable antibiotic isn’t cleared quickly from a cat’s body, even after the 14 days of antibacterial effects have passed. This may increase the risk of problems developing.

Another thing to consider: the side effects of injectable antibiotics could range from mild to life threatening, and many pet parents have taken to the web to tell their stories about their cats’ adverse reactions to Convenia, in particular. A Facebook page titled “Convenia adverse reactions in cats/felines and dogs/canines” is one example of a place where individuals who’ve lost pets to injectable antibiotics can share information.

Injectable medications, such as antibiotics, have their pros, and when they’re used appropriately, they can be helpful. However, it’s important to discuss the potential drawbacks of these medications with your vet.

  • Before giving your cat any medication, it’s a good idea to have a discussion about its pros and cons with your veterinarian. Don’t hesitate to ask plenty of questions so you can better understand why the medicine is being prescribed, what it is supposed to do for your pet, and what potential side effects might arise. When it comes to an injectable antibiotic, you definitely want to rest assured that it is necessary, and that it can work against whatever ailment your furry companion has been diagnosed with.
  • In addition to asking about what an antibiotic injection can be used for, it’s also wise to ask about the possible side effects that can occur once the medicine is in your cat’s body. Keep in mind that, if an adverse or allergic reaction occurs, there may not be much that can be done, whereas you do have the opportunity to stop administering an oral medication, which will also be cleared from the pet’s body more quickly than a long-lasting injection.
  • Prior to agreeing to give your cat an antibiotic shot, ask about what the injection is labeled to treat. For example, Convenia is formulated to treat bacterial skin infections, but a veterinarian might prescribe it for other problems. Having an understanding of the condition that your pet has been diagnosed with can help you make a more informed decision regarding the path you want to take to treat your companion.
  • Don’t be afraid to ask your veterinarian if there is an alternative option. For example, you might ask if there is an antibiotic that you can administer orally or topically. Of course, this will depend on your cat’s condition. But if you have other options to treat your pet in the same way that an antibiotic injection would, and those medications involve less risk of side effects or adverse interactions, it’s a great idea to talk to your vet about taking that route instead.

If you decide that you don’t want your cat to get an antibiotic injection, be upfront by letting your veterinarian know how you feel. You might even ask that a note be made in your cat’s file so that anyone on the staff who looks after or treats your companion will be aware of your decision.

Consider weighing the benefits and drawbacks before making a decision about injectable antibiotics. It might give you greater peace of mind, and reduce some risk, if you opt to give your kitty oral medications while using strategies to make the process less stressful for you and your pet.


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