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Cephalexin Oral Suspension 250mg/5ml (200ml) (Manufacturer may vary)

Item# IWM900725
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Cephalexin is a broad-spectrum antibiotic available as capsules or suspension used to treat bacterial infections. Cephalexin is an antibiotic belonging to a class of drugs called cephalosporins that fight bacteria in the body. It can be used to treat infections such as bronchitis, as well as ear, skin, and urinary tract infections. Cephalexin may also be used for purposes other than those listed. Cephalexin requires a prescription from your veterinarian.

Key Benefits

  • Effectively treats bacterial skin infections
  • Also treats infections of the urinary tract, respiratory tract, bones, and joints
  • Can prevent secondary infections
  • Sold affordably by individual capsules

How it works

Cephalexin is a cephalosporin antibiotic. Cephalosporin antibiotics suppress the growth of micro-organisms such as bacteria, fungi, or protozoa.


Cephalexin is a semisynthetic cephalosporin antibiotic used to treat a wide variety of gram-positive and gram-negative pathogens. It is acid stable and may be given without regard to meals and it is rapidly absorbed after oral administration. It is used to treat infections of the skin, urinary tract, respiratory tract and infections in bones and joints caused by susceptible bacteria.

Generic Cephalexin are approved for treatment of susceptible organisms causing the following infections:

  • Otitis media due to Streptococcus pneumoniae, Haemophilus influenzae, Staphylococcus aureus, Streptococcus pyogenes, and Moraxella catarrhalis.
  • Skin and skin structure infections caused by Staphylococcus aureus and/or Streptococcus pyogenes
  • Bone infections caused by Staphylococcus aureus and/or Proteus mirabilis
  • Genitourinary tract infections, including acute prostatitis, caused by E.coli, Proteus mirabilis, and Klebsiella pneumonia

Note: Methicillin-resistant staphylococci and most strains of enterococci (Enterococcus faecalis [formerly Streptococcus faecalis]) are resistant to cephalosporins, including cephalexin. It is not active against most strains of Enterobacter spp., Morganella morganii, and Proteus vulgaris. It has no activity against Pseudomonas spp.or Acinetobacter calcoaceticus. Penicillin-resistant Streptococcus pneumonia is usually cross-resistant to beta-lactam antibiotics.


Cephalexin 250 mg
Active Ingredient Amount
Cephalexin Monohydrate 250 mg
Cephalexin 500 mg
Active Ingredient Amount
Cephalexin Monohydrate 500 mg
Cephalexin Liquid
Active Ingredient Amount
Cephalexin USP 250 mg/ 5 ml
Other Ingredients: Colloidal silicon dioxide, FD&C Red No. 40, Sodium benzoate, Strawberry flavor, Sucrose, Xanthan Gum.


  • Cephalexin is a broad spectrum prescription antibiotic used to treat bacterial infections of the respiratory tract (such as bronchitis), skin, urinary tract, bones and joints.
  • Cephalexin is not FDA approved for use in veterinary medicine; however, it is a commonly accepted practice for veterinarians to prescribe this medication for dogs and cats.
  • Cephalexin may be given on an empty stomach or with food to prevent stomach upset.
  • Give all of the Cephalexin that was prescribed for your pet. Symptoms may begin to improve before the infection is completely treated.
  • When mixed with 71 ml of water, each teaspoonful (5 ml) contains 250 mg of cephalexin. After mixing, store in the refrigerator and shake well before using. Discard any unused medication after 14 days.

Tip: Cephalexin Suspension contains sucrose, which may affect the treatment of diabetic pets.

Cephalexin Dosage for Cats
Weight Dosage
All weights Give 5-15 mg/lb of pet's body weight every 8-12 hours
Cephalexin Dosage for Dogs
Weight Dosage
All weights Give 5-15 mg/lb of pet's body weight every 8-12 hours


Store capsules at room temperature away from moisture or heat. Store the suspension (liquid) in the refrigerator.


In the event of an allergic reaction - such as shortness of breath, rash, hives, vomiting, diarrhea, mucous or blood in the stool, swelling of the lips, tongue, or face, and unusual bleeding or bruising - contact your veterinarian immediately.


Toxicology: Safe to use in dogs and cats with few side effects.

Side Effects:

Some animals may experience upset stomach, diarrhea and vomiting. Dogs may also experience excessive salivation, panting or excitability. Cats may also experience a fever greater than 103°F.


Safety for use in pregnant female dogs and cats or in breeding males has not been determined. Also use with caution in animals with kidney disease. Always give the full dosage as prescribed by your veterinarian.

Not for use in animals that are raised for food production.

Keep out of the reach of children.

Federal law restricts this drug to use by or on the order of a licensed veterinarian.


Cephalexin Oral Suspension is a broad spectrum antibiotic prescribed by veterinarians to treat a variety of bacterial infections found in your dog's soft tissue, skin, respiratory tract and urinary tract.

Cephalexin Oral Suspension treats infections of the:

  • Respiratory tract
  • Soft tissue
  • Skin
  • Urinary tract
Cephalexin inhibits bacterial wall nucleopeptide synthesis processes, causing destruction of the bacteria.

Cephalexin is often administered to dogs for many months without any negative side effects. However, potential adverse reactions include:

  • Diarrhea
  • Vomiting
  • Lack of appetite

Or, more rarely, your dog might experience:

  • High fever
  • Excitability
  • Rashes
  • Rapid breathing
  • Drooling

If you observe any unusual behaviors or symptoms in your dog, notify your veterinarian right away.

  • Never administer to an animal who has previously had an allergic reaction to antibiotics, cephalosporins, or penicillin.
  • Do not use in lactating or pregnant animals.
  • Use cautiously in pets who have previously had seizures or animals experiencing kidney failure.
  • Keep out of reach of animals and children.
Contact your closest emergency pet hospital.

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