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Keflex (Cephalexin)

Prescription medicineOnly Available By Prescription

Top Generic choice

Strength Pack Size Qty
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What if I find a lower price with another pharmacy?

We guarantee the lowest price on all of our prescription products. If you find your medications cheaper at any other recognized licensed mail order pharmacy, we will not only match their price, we will beat it by 25% of the difference. It is our 125% price match guarantee!

Example: If you find a product on Canada Drugs Direct for $50.00 and find the same product for $40.00 at another mail order pharmacy, we will provide you with a $12.50 discount, bringing your total to $37.50.

To get the discount please make sure to mention the price match to the customer service team when they call to collect payment for your order. Or call toll free at 1-888-904-8467 to place the order through the phone.

Terms & Conditions of Program

  • Guaranteed lowest price is only valid at the time of sale.
  • We will only match the current advertised price.
  • Products must be identical and in stock at the time of placing an order with a licensed mail order pharmacy. They must be an online Canadian pharmacy with an address in Canada.
  • Products must be authentic in brand and size (same manufacturer, same country of manufacture, same pack size, same strength and same quantity).
  • Products must be new. We cannot match the price of any used, short expiry or expired product.
  • Price match can only be issued over the phone with our customer service team. Please note at this time we cannot offer price matching for the products Ozempic or Saxenda.
What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.


Keflex (cephalexin) is an antibiotic that is commonly used to treat a variety of susceptible infections, including:

  • Respiratory tract infections
  • Ear infections
  • Skin infections
  • Bone infections
  • Genitourinary tract infections

Keflex comes in 250 mg, 500 mg, and 750 mg capsules for oral use.

Fact Table




US FDA, US DailyMed


Well absorbed

Legal status


Chemical Name


Elimination half-life

0.6–1.2 hours

Dosage (Strength)

250mg, 500mg





Protein binding


PubChem CID






ATC code






Routes of administration

By mouth


Patients should take Keflex exactly as their doctor has prescribed. They should finish their course of antibiotics, even if they start to feel better. Their doctor or pharmacist can assist with any questions or concerns they may have.

Age and the type of infection being treated determine each patient's dose. Patients generally take Keflex for 7 to 14 days depending on the type of infection and its severity. Patients with kidney problems may need a lower dose.


The active ingredient in Keflex is cephalexin, a cephalosporin.


Patients with an allergy to Keflex or to any of the other antibiotics in its class should avoid its use.


  • Before patients start taking Keflex, they should tell their doctor about:
    • All the medications they take
    • Their allergies
    • Their medical history and current health problems
    • Their pregnancy or breastfeeding status
  • Serious allergic reactions, including anaphylaxis, can occur with Keflex use. Patients should seek emergency care right away if they have trouble breathing, a rash, or swelling of the face, tongue, or throat. 
  • Clostridium difficile-associated diarrhea can occur with Keflex use.
  • Cephalosporins can cause anemia.
  • Cephalosporins can cause seizures. Patients with kidney problems may be at higher risk. 
  • Prolonged prothrombin time can occur with cephalosporins, especially in patients with kidney or liver problems, malnutrition, or in patients receiving a protracted course of antibiotics and in patients taking anticoagulants.
  • An overgrowth of resistant bacteria may develop if using Keflex long-term.

Side Effects

Keflex side effects include diarrhea, nausea, vomiting, indigestion, and stomach pain. However, other side effects can occur, so patients should contact their doctor if they experience bothersome or persistent side effects.


  1. Keflex cephalexin capsules. Locust Valley, NY: Fera Pharmaceuticals, LLC; 2018.

IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

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