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Last updated on: November 18th, 2021

Generic Name: Cefalexin

Brand names: Ospeksin, Kefleks, Fleksin

Pharmacological action:

Keflex belongs to semisynthetic cephalosporin antibiotic series (1 generation). The medicine effects bactericidally. This remedy has wide spectrum and is recommended to get rid of different kinds of bacteria. Keflex is sensetive to the following: pneumococcus, Haemophilus coli, Shigella, staphylococcus, treponema, Escherichia coli, Proteus, klebsiella, Salmonella, streptococcus. Mycobacteriums of tuberculosis, enterococci, enterobacteria are resistant to it.

Contact your physician if you need to learn more information about this drug.

Don’t stop treatment with Keflex earlier than it was prescribed by your doctor even if you notice improvements of your condition. Stopping the medication too early may worsen your condition. Be careful about doing dangerous tasks, driving, operating machinery or climbing until you are aware how this drug affects you. Don’t drink alcohol. Always contact a medic before giving Keflex to a child.

Kefleks is prescribed to treat the following conditions:

  •     Respiratory tract caused by sensitive pathogens to Keflex (lung abscess, pneumonia, bronchitis, pleurisy)
  •     Urinary system caused by sensitive pathogens to Keflex (cystitis, pyelonephritis, etc.) and the reproductive system (epididymitis, vulvovaginitis, endometritis, etc.)
  •     ENT-organs (pharyngitis, otitis, tonsillitis, etc.)
  •     Skin (abscess, abscess, pyoderma, furunculosis)
  •     Locomotor (osteomyelitis, arthritis)

How do I take this medicine?

Note: This remedy was prescribed to you only. Do not share this medicament with others.

For adults the drug is assigned with a daily dose of 1-4 g, if the infection caused by gram-negative flora, dosage may be increased to 4-6 g, we recommend using the medicine every 6 hours. The course of treatment may take 1-2 weeks.

For children the medicine is given by 25-50 mg per kilogram of body weight, if the infection is caused by gram-negative flora, dosage can be increased to 100 mg per day.

The dosage may vary among individuals. It is obviously to contact your doctor before taking this medicament. Follow your physician’s instructions carefully.


What should be done if I missed the dose?

In case you forgot to take the dose, take it at your earliest opportunity. Never double your dose if it is almost time for your next dose. Take only one dose at once.

What should you do if you overdose of Keflex?

Taking any medicine in large doses you can have serious consequences for your health. If you feel an overdose, contact your health care professional instantly.

Which side effects can I perceive from this remedy?

From the side of gastrointestinal tract: indigestion, pseudomembranous colitis, diarrhea.

Other side effects: dizziness, allergic reactions, reaction from the blood side (leukopenia, neutropenia, eosinophilia), tremor, weakness, in rare cases up to the anaphylactic shock.

If these side effects persist or worsen, contact your medical practitioner straightway. Remember, this list of side effects is not complete, others may occur. If you notice any side effect, call your doctor or pharmacist.


Intolerance of cephalosporin antibiotics and penicillin.


Applications for the medicine during pregnancy can be made under the strict control of a physician.


Interactions with other drugs:

The medicine has bactericidal influence, and therefore it is inappropriate to use it in conjunction with antibiotics, having a bacteriostatic action (eg, tetracycline antibiotics, chloramphenicol). It should be taken with great caution with nephrotoxic drugs (aminoglycosides, polymyxin) and loop diuretics (ethacrynic acid, furosemide).

Provide your medical practitioners entire list of medicines, herbs, dietary supplements or non-prescription drugs you take. Moreover tell them whether you drink alcohol, use illegal drugs or smoke. Particular items may interact with your drug.


Keflex should be stored at room temperature, between 15 and 30 degrees C (59 and 86 degrees F), in a tightly closed container. Protect from moisture, direct heat, and light. Do not store in the bathroom or near a sink. Keep Keflex out of the reach of children and away from animals.

Warning: Before taking the drug you need to consult your doctor.

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