Keflex (Cephalexin) – Generic




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Product Details


What is Keflex 500mg used for?

Chemical Name: CEPHALEXIN (sef-a-LEX-in)


Keflex is a cephalosporin used to cure certain diseases caused by bacteria, for example, pneumonia and bone, ear, skin, and infections in the urinary tract. The antibiotics won’t work for colds, influenza, or other viral diseases.

Keflex antibiotics work by killing the bacteria that are causing your infection.


Your doctor will tell you how much and how often you should take Keflex. This will depend on the type of infection. The dose varies from patient to patient. Swallow the capsules whole with a full glass of water. You can take this medicine with or without food. Make sure that you continue taking Keflex for as long as your doctor tells you. It is important to complete the full course prescribed by your doctor, even if you begin to feel better after a few days. If you do not, the bacteria causing your infection may not be eliminated completely, or your symptoms may return. Store below 25 degrees Celsius and protect from light.


The active ingredient of Keflex 250 mg and Keflex 500 mg is cephalexin 250 mg and 500 mg respectively. The capsules also contain carboxymethylcellulose sodium, D&C Yellow No. 10, Dimethicone, FD&C Blue No. 1, FD&C Yellow No. 6, gelatin, magnesium stearate, microcrystalline cellulose, and titanium dioxide.



Do not take Keflex if you have an allergic reaction to any of the ingredients.

Let your doctor know of your medical history and if you are pregnant or breastfeeding to discuss the risk of taking this medicine. Also, tell your doctor about all the other medicines that you are taking to avoid adverse drug interactions. As it causes dizziness and drowsiness, avoid doing any activity that requires full attention. Never alter your dosage without consulting your doctor as this may worsen your condition.

Side Effects

Side effects that may occur while taking this medication include:

  • Upset stomach
  • Diarrhea
  • Mild nausea
  • Dizziness
  • Joint pain
  • Vaginal itching or discharge
  • Vomiting
  • Mild skin rash

Call your doctor at once if you have any of these serious side effects that include:

  • Seizure
  • Fever
  • Sore throat
  • Headache
  • Pale or yellowed skin
  • Dark colored urine
  • Fever
  • Weakness
  • Easy bruising
  • Urinating less than usual or not at all.