Cefadroxil

What is cefadroxil?

Cefadroxil is an antibiotic (first-generation cephalosporin) used to treat bacterial infections of the skin, respiratory tract, and urinary tract in cats and dogs. It may be used off label (extra label) to treat other bacterial infections in dogs and cats and in ferrets and birds.

Many drugs are commonly prescribed for off-label use in veterinary medicine. “Off label” means the drug is being used in a way that has not been reviewed or approved by the U.S. Food and Drug Administration (FDA) or Health Canada. In these instances, follow your veterinarian’s directions and cautions carefully, as they may be significantly different from those on the label.

How do I give my pet cefadroxil?

• Cefadroxil comes in tablet and powder forms. Tablets and powders may be compounded into liquid form.
• All forms are given orally (by mouth).
• Measure liquid medication carefully. 
• Contact your veterinarian if you have trouble measuring or giving the medication.
• This medication may be given with or without food.
• If your animal vomits or acts sick after receiving the drug on an empty stomach, try giving the next dose with food or a small treat. If vomiting continues, contact your veterinarian.
• Give this medication to your pet for the entire time prescribed by your veterinarian, even if it appears that your pet is feeling better.

This medication should take effect within 1 to 2 hours, although effects may not be noticed outwardly.

What if I miss giving my pet the medication?

If you miss a dose, give it as soon as you remember, and then wait the recommended amount of time between doses. Do not give the pet two doses at once.

Are there any potential side effects?

Cefadroxil may cause the following side effects:

• Decreased appetite
• Diarrhea
• Vomiting

Serious adverse reactions may occur. If any of the following signs develop, stop giving cefadroxil and contact your veterinarian immediately:

• An allergic reaction such as irregular breathing, rash, fever, puffiness and swelling around the face

Drug sensitivities can develop over time with repeated exposure. Your pet may have no reaction after the first few doses, but may develop a sensitivity later. It is important to watch for signs of an allergic reaction over the entire course of treatment and notify your veterinarian if you have any concerns. 

Other side effects may occur. If you notice anything unusual, contact your veterinarian immediately. This short-acting medication should stop working within 24 hours, although effects may last longer in pets with kidney or liver disease.

Are there any risk factors for this medication?

DO NOT USE cefadroxil in:

• Pets that are allergic to any component of the medication
• Pets that are allergic to similar drugs (e.g., other cephalosporins, penicillins)

USE WITH CAUTION in:

• Pets with kidney disease

Are there any drug interactions I should be aware of?

Certain medications should be USED WITH CAUTION when given with cefadroxil, including:

• Aminoglycosides
• Amphotericin B
• Probenecid
• Vitamin K antagonists (e.g., warfarin)

Be sure to tell your veterinarian about any medications (including vitamins, supplements, or herbal therapies) that your pet is taking before starting any new treatment.

Is any monitoring needed with this medication?

• Your veterinarian may check a bacterial culture and sensitivity test before starting this medication and periodically throughout treatment.
• Your veterinarian will schedule follow-up visits for monitoring. In this case, follow your veterinarian’s directions.
• At home, monitor for any side effects such as those noted above. If any occur, stop using the medication and contact your veterinarian. 

How do I store cefadroxil?

• Store at room temperature between 66°F and 77°F (20°C-25°C) with short excursions permitted between 59°F and 86°F (15°C and 30°C).
• Store in a tight container, protected from light.
• Store compounded forms of this medication according to the label.
• Keep medication out of reach of children and pets.

What should I do in case of emergency?

If you suspect an overdose or an adverse reaction to the medication, call your veterinary office immediately. If they are not available, follow their directions in contacting an emergency facility. Be prepared to provide information about the product and your pet's weight and symptoms. Adverse effects should be reported to the FDA or Health Canada.