Clavamox for Cats: Dosage, Side Effects & What It Treats

Clavamox for Cats Quick Facts

Clavamox is a broad-spectrum antibiotic combining amoxicillin and clavulanic acid, commonly prescribed for skin, respiratory, urinary, and dental infections in cats.

Giving your cat Clavamox?

Track medication doses, symptoms, and follow-up bloodwork to see if the infection is clearing.

Track My Cat's Treatment

If your cat has been prescribed Clavamox, you may be wondering what it's for and whether it's safe. Clavamox is one of the most commonly used antibiotics in veterinary medicine. This guide explains what it treats, how it works, possible side effects, and what to expect while your cat is on it.

What Is Clavamox?

Clavamox is the brand name for a combination of amoxicillin and clavulanic acid. Amoxicillin is a penicillin-type antibiotic that fights bacteria, while clavulanic acid helps prevent bacteria from becoming resistant. Together, they make a broad-spectrum antibiotic effective against many common infections in cats.

Key Facts About Clavamox:

Generic Name: Amoxicillin/clavulanic acid
Brand Name: Clavamox (veterinary)
Drug Class: Beta-lactam antibiotic with beta-lactamase inhibitor
Spectrum: Broad-spectrum antibiotic
Available Forms: Tablets, chewable tablets, oral suspension

Why Do Vets Prescribe Clavamox for Cats?

Clavamox is often prescribed for:

• Skin infections: abscesses, wounds, bite wounds
• Respiratory infections: sinus infections, pneumonia
• Urinary tract infections: bladder infections, cystitis and UTIs
• Dental infections: tooth root abscesses, gingivitis

It's usually given orally as tablets or liquid drops. The broad-spectrum nature of Clavamox makes it effective against both gram-positive and gram-negative bacteria, which is why it's often a first-choice antibiotic for many feline infections. For cats who resist taking oral medications, Convenia (an injectable antibiotic) is sometimes used as an alternative.

Common Side Effects of Clavamox in Cats

Most cats tolerate Clavamox well, but side effects can occur, especially with longer courses. The most common ones include:

• Vomiting
• Diarrhea
• Decreased appetite
• Mild lethargy

Warning

Serious Side Effects (Rare but Important)

• Allergic reactions (facial swelling, hives, difficulty breathing)
• Severe diarrhea or colitis
• Skin rash or itching
• Yellowing of gums or eyes (rare liver reaction)

Allergic reactions are an emergency - contact your veterinarian immediately

Giving your cat Clavamox?

Track doses, symptoms, and recovery. Know if the antibiotic is working and watch for side effects.

Monitor My Cat's Infection Progress

Dosage and Safety Considerations

Your vet will prescribe Clavamox based on your cat's weight and the type of infection being treated. It's important to:

Important Administration Guidelines:

• Complete the full course: Even if your cat looks better before finishing
• Consistent timing: Give doses at evenly spaced intervals
• Proper storage: Refrigerate liquid formulations and shake well before giving
• With or without food: Can be given either way, food may reduce stomach upset

Emergency

Important Contraindications

Clavamox should not be used in cats with known allergies to penicillin-type drugs. Always inform your veterinarian of any previous antibiotic reactions.

Typical Dosage Information

Standard Dosing Guidelines:

Typical dose: 13.75 mg per kg twice daily
Duration: Usually 7-14 days depending on infection type
Frequency: Every 12 hours for best effectiveness
Forms available: 62.5mg, 125mg, 250mg, and 375mg tablets

Always follow your veterinarian's specific dosing instructions for your cat.

Monitoring While on Clavamox

• Monitor for gastrointestinal upset or changes in appetite and energy
• Watch for signs of allergic reaction, especially during the first few doses
• Call your vet if side effects seem severe or persistent
• For urinary or kidney infections, follow-up testing may be recommended
• Complete blood work may be suggested for severe or recurring infections

What to Expect During Treatment

Treatment Timeline:

• 24-48 hours: Initial response may be seen
• 2-3 days: Significant improvement typically occurs
• 7-14 days: Full course duration for complete bacterial elimination
• Follow-up: May include repeat testing to confirm infection clearance

Track Your Cat's Clavamox Treatment

Antibiotics often require follow-up checks to make sure the infection is resolved. With VetLens, you can:

✓ Store and track your cat's bloodwork results
✓ Get plain-English explanations of CBC and chemistry panels
✓ Monitor symptoms and medication response
✓ Share updates with your vet in an organized way

Analyze My Cat's Bloodwork

Frequently Asked Questions

Is Clavamox safe for kittens?

Yes, it can be prescribed for kittens, but the dose must be adjusted carefully for their size and age. Young kittens may be more sensitive to gastrointestinal side effects.

How long does it take for Clavamox to work?

Many infections start to improve within 2–3 days, but the full course must be finished to completely clear the infection and prevent antibiotic resistance.

Can Clavamox be given with food?

Yes, giving it with food may help reduce stomach upset. However, it's equally effective whether given with or without food.

What if I miss a dose?

Give it as soon as you remember, unless it's close to the next scheduled dose. Do not double up on doses. Consistent timing helps maintain effective antibiotic levels.