Main information about Keflex

Keflex provides a bactericidal action to many types of gram-positive and gram-negative microbes. This is an antibiotic from the group of cephalosporin that contains Cephalexin.

Keflex is evenly spread in most tissues of the body, and a peak of the concentration of Cephalexin is observed in an hour.

The use of Keflex seldom causes side effects. This is a very effective and safe antibiotic which completely kills bacteria and their cells.

Keflex better acts during the infectious diseases of kidneys, bladder, skin and joints. But the action is broader.

Keflex is actively used for such infectious inflammatory diseases as pyelonephritis, cystitis, prostatitis, endometritis, pneumonia, lung abscess, tonsillitis, pharyngitis, otitis media, abrasions, gonorrhea, osteomyelitis and others.

But not all microorganisms have similar sensitivity to Cephalexin, and that is why this antibiotic is ineffective during infectious tuberculosis and diseases caused by anaerobic microorganisms.

Administration and dosage of Keflex

After the peroral use, about 90% of the active ingredients of Keflex are absorbed into the gastro-intestinal tract within 30 minutes.

Food slows down the uptake of Cephalexin but it does not influence on the therapeutic characteristics of the antibiotic. Therefore, you may take Keflex both before and after meals.

Keflex is taken 3-4 times per day, in low doses 250-500 mg. This is usually enough to completely neutralize the action of the pathogenic microflora within 5-7 days.

However, if severe infection (especially of urinary system) has been detected, a dose of Keflex may be higher. The maximal daily dose of Keflex is 4000 mg (1000 mg of Keflex every 6 hours).

A minimal length of the treatment is 5 days. In most cases, the symptoms of the severest infection are reduced within 14 days but if the needed effect is not achieved within this period, a doctor may prolong the treatment.

Children the age of 3 to 12 are prescribed an individual dose depending on the body weight. This is usually 125-250 mg 3-4 times per day.

Recommendations for the use

  • Children at the age of 6 months to 3 years old should take suspensions of Keflex
  • Keflex is one of few antibiotics which may be used during pregnancy but only after approval by your doctor and if contraindications are absent.
  • If you are breast-feeding, use a bottle feeding during the use of Keflex
  • Avoid alcohol consumption and other products which contain ethanol during the treatment




Side effect 

Nausea, diarrhea, abdominal pain, fatigue, itching, genital candidiasis are the most common side effects of the antibiotics from the group of cephalosporin. Most of these side effects pass within 1-3 days and are light.

But the appearance of the skin rash, itching, or urticaria tells about the intolerance of Cephalexin, and in this case, cancel the use of Keflex.

Candidiasis is a common side effect of all antibiotics and may be prevented by taking antifungal products.