Antibiotics for bladder infection in dogs

Updated November 21, 2016

Bladder infections and urinary tract infections in dogs are commonly treated with one of three broad spectrum oral antibiotics suitable for bacterial infections. Full courses of treatment and medication dosages are based on the particulars of each individual infection, age, weight and general health of the dog. Your veterinarian will choose a drug appropriate for your dog if it has any underlying drug sensitivities or allergies. Antibiotics should not be used without a veterinary prescription.


Amoxicillin is one of more commonly used of the canine-appropriate antibiotics. When used to treat bladder infections, it inhibits growth of the bacteria by preventing growth of bacteria cell walls. When frequently used, the dog can begin to produce bacteria that is resistant to amoxicillin. Drug-resistant bacterial infections require treatment with other broad spectrum antibiotics. Amoxicillin has been around long enough to have generic forms available for veterinary use. Diarrhoea is a common side effect that may be lessened by administering the medication with food.


Sold in foil packets that must remain unopened until just prior to use, Clavamox combines amoxicillin trihydrate with the potassium salt of clavulanic acid to form this broad spectrum antibiotic. The veterinary drug is made by Pfizer Animal Health. The drug is applicable for treating E-coli, streptococcus, staphylococcus and salmonella based bacterial infections. Clavamox contains semisynthetic penicillin, so it should not be used in dogs that are allergic to penicillin.


Fluoroquinolone Baytril is commonly prescribed for dogs that have bacterial infections that may be difficult to eliminate. The drug is manufactured by Bayer Animal Health. Baytril breaks up the DNA of known bacterias and is used to treat E-coli, staphylococcus, topoisomerase IV and pseudomonas-based bacterial infections. It is also commonly used in dogs that suffer from recurrent bladder infections due to physical abnormality or underlying disease. Baytril is the strongest of the three antibiotics suitable for treating bladder infections. Like other antibiotics, side effects are diarrhoea and at times, yeast infections post-use.

Cite this Article A tool to create a citation to reference this article Cite this Article

About the Author