{"id":627585,"date":"2024-03-27T16:17:24","date_gmt":"2024-03-27T20:17:24","guid":{"rendered":"https:\/\/www.singlecare.com\/blog\/?p=627585"},"modified":"2026-06-24T17:37:33","modified_gmt":"2026-06-24T21:37:33","slug":"amoxicillin-for-cats","status":"publish","type":"post","link":"https:\/\/www.singlecare.com\/blog\/amoxicillin-for-cats\/","title":{"rendered":"Amoxicillin for cats: Dosage and Safety"},"content":{"rendered":"

Amoxicillin<\/span><\/a> is a bactericidal antibiotic commonly used in cats and dogs. It’s related to<\/span> penicillin<\/span><\/a>, but animals absorb it more readily, and the medication remains active longer. Amoxicillin, penicillin, and similar medications called beta-lactams kill bacteria by blocking their ability to make cell walls, but they don’t work against all bacteria. The U.S. Food and Drug Administration (FDA) approves amoxicillin for certain feline bacterial infections, including respiratory, urinary tract, skin, soft tissue, and intestinal infections. However, veterinarians may use it<\/span> off-label<\/span><\/a> for other types of bacterial infections.\u00a0<\/span><\/p>\n

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What is amoxicillin used for in cats?<\/span><\/h2>\n

Veterinarians use<\/span> amoxicillin<\/span><\/a> to eradicate bacterial infections in cats. According to its <\/span>prescribing label<\/span><\/a>, the FDA has approved amoxicillin to treat certain bacterial infections of the respiratory tract, digestive system, skin, soft tissues, and urinary tract.\u00a0<\/span><\/p>\n

Amoxicillin cannot fight off every type of bacterial infection. Its<\/span> spectrum of activity<\/span><\/a> is particularly strong against anaerobic bacteria that don’t need oxygen. Provided they haven’t developed resistance to beta-lactam medications such as amoxicillin. Some drug-resistant infections will require amoxicillin combined with clavulanate, such as<\/span> Augmentin<\/span><\/a>.\u00a0<\/span><\/p>\n

Urinary tract infections<\/span><\/h3>\n

Urinary tract infections (UTIs), particularly bladder infections, often involve bacteria<\/span> susceptible to amoxicillin<\/span><\/a>, such as Staphylococcus, Streptococcus, and E. coli. Still, amoxicillin can’t treat every infection, so veterinarians predict the likely bacteria and<\/span> select an appropriate antibiotic<\/span><\/a> based on the specifics of the case.\u00a0<\/span><\/p>\n

Gastrointestinal infections<\/span><\/h3>\n

Many bacteria that cause UTIs normally live harmlessly in the intestines, but they can sometimes cause problems there, too. Amoxicillin can treat infections caused by susceptible bacteria. Some cats are also infected with a type of stomach bacteria called Helicobacter. Veterinarians remain uncertain about<\/span> Helicobacter’s role in feline gastritis<\/span><\/a>, though the infection may sometimes irritate the stomach lining. Veterinarians may prescribe amoxicillin or another antibiotic off-label for cats with signs of stomach irritation or ulcers, such as chronic vomiting or loss of appetite.\u00a0<\/span><\/p>\n

Upper respiratory tract infections<\/span><\/h3>\n

Some upper respiratory tract infections in cats are caused by<\/span> bacteria that respond to amoxicillin<\/span><\/a>. This may include less common conditions, such as tonsillitis and tracheobronchitis, which often develop after a viral infection, dental disease, or airway irritation. A veterinarian may prescribe amoxicillin or another antibiotic based on the most likely bacteria and<\/span> current veterinary guidelines<\/span><\/a>. Repeated infections may require testing to identify the exact bacteria involved.\u00a0<\/span><\/p>\n

Skin and soft tissue infections<\/span><\/h3>\n

Staphylococcus and Streptococcus species often cause skin and soft tissue infections in cats, including bacterial dermatitis, abscesses, lacerations, and wounds. Both respond to amoxicillin. Because these bacteria are so common, veterinarians may<\/span> treat skin infections<\/span><\/a> with amoxicillin-clavulanate, based on severity and clinical signs. If the antibiotic doesn’t work, they’ll test a sample.\u00a0<\/span><\/p>\n

Is amoxicillin safe for cats<\/span>?<\/span><\/h2>\n

Penicillins, such as amoxicillin, are among the <\/span>most commonly used antibiotics in dogs and cats<\/span><\/a>. Amoxicillin is effective, generally safe, well-studied, and has few side effects. Its main drawback is the potential to provoke an allergic reaction, as with any antibiotic. Cats that have had any allergic reaction to penicillin or other penicillin antibiotics should not be given amoxicillin. Cats that have reacted to medications similar to amoxicillin may also react to amoxicillin itself. Tell the veterinarian about any allergic reaction a cat has had to past medications. Cats with sepsis, shock, or severe illness should not be given oral antibiotics. They may be too sick to absorb the medication, so injections are needed.<\/span><\/p>\n

Side effects of amoxicillin in cats<\/span><\/h3>\n

The most <\/span>common side effects of amoxicillin<\/span><\/a> in cats are:<\/span><\/p>\n