KEFLEX® (Cephalexin): How to use, Side Effects, Dosage

KEFLEX® (Cephalexin): How to use, Side Effects, Dosage

What is Keflex?

Keflex is brand name of cephalexin. (brand names: Daxbia, Keflex generic names: cephalexin).

KEFLEX® (cephalexin) Capsules, USP is a semisynthetic cephalosporin antibacterial drug intended for oral administration. It is 7-(D-α-Amino-α-phenylacetamido)-3-methyl-3-cephem-4-carboxylic acid monohydrate. Cephalexin has the molecular formula C16H17N3O4S•H2O and the molecular weight is 365.41.

Each capsule contains cephalexin monohydrate equivalent to 250 mg, 500 mg or 750 mg of cephalexin. The capsules also contain carboxymethylcellulose sodium, D&C Yellow No. 10, dimethazone, FD&C Blue No. 1, FD&C Yellow No. 6, gelatin, magnesium stearate, microcrystalline cellulose, and titanium dioxide.

form(s): This medication is available as 250 mg and 500 mg tablets. It is also available as 125 mg/5 mL and 250 mg/5 mL liquid suspensions.

Please if you have any questions about KEFLEX® (Cephalexin), you can ask us by commenting below this text, we'll answer you as soon as possible.

How to take Keflex?

Don't Take if: Cephalexin should not be taken by anyone who:

is allergic to cephalexin, any of the cephalosporin antibiotics, or to any of the ingredients of the medication

is allergic to penicillin (people allergic to penicillin should be monitored by their doctor as they have an increased risk of being allergic to cephalosporin antibiotics)

How to use Keflex?

Do not use Keflex if you are allergic to cephalexin or to other cephalosporin antibiotics, such as:

cefaclor (Raniclor);

cefadroxil (Duricef);

cefazolin (Ancef);

cefdinir (Omnicef);

cefditoren (Spectracef);

cefpodoxime (Vantin);

cefprozil (Cefzil);

ceftibuten (Cedax);

cefuroxime (Ceftin); or

cephradine (Velosef), and others.

To make sure Keflex is safe for you, tell your doctor if you have:an allergy to any drugs (especially penicillins);

kidney disease; or

a history of intestinal problems, such as colitis.

Keflex is not expected to be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.

Cephalexin can pass into breast milk and may harm a nursing baby. Tell your doctor if you are breast-feeding a baby.

Keflex Usage

To reduce the development of drug-resistant bacteria and maintain the effectiveness of KEFLEX and other antibacterial drugs, KEFLEX should be used only to treat infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information is available, this information should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.

Keflex (cephalexin) is a cephalosporin (SEF a low spor in) antibiotic. It works by fighting bacteria in your body.

Keflex is used to treat infections caused by bacteria, including upper respiratory infections, ear infections, skin infections, and urinary tract infections.

Keflex may also be used for purposes not listed in this medication guide.

This drug is used to treat a wide variety of bacterial infections. This medication is known as a cephalosporin antibiotic. It works by stopping the growth of bacteria. This medication will not work for viral infections (such as common cold, flu). Unnecessary use or misuse of any antibiotic can lead to its decreased effectiveness.

Take Keflex exactly as it was prescribed for you. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.

Do not use Keflex to treat any condition that has not been checked by your doctor.

Use this drug for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antibiotics. Keflex will not treat a viral infection such as the flu or a common cold.

Do not share Keflex with another person, even if they have the same symptoms you have.

This drug can cause you to have unusual results with certain medical tests. Tell any doctor who treats you that you are using Keflex.

Take Keflex exactly as it was prescribed for you. Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include nausea, vomiting, stomach pain, diarrhea, and blood in your urine.

Keflex

Please if you have any questions about KEFLEX® (Cephalexin), you can ask us by commenting below this text, we'll answer you as soon as possible.

Dosage of Keflex

Adults and Pediatric Patients at Least 15 Years of Age.

The usual dose of oral KEFLEX is 250 mg every 6 hours, but a dose of 500 mg every 12 hours may be administered. Treatment is administered for 7 to 14 days.

For more severe infections larger doses of oral KEFLEX may be needed, up to 4 grams daily in two to four equally divided doses.

Pediatric Patients (over 1 year of age)

The recommended total daily dose of oral KEFLEX for pediatric patients is 25 to 50 mg/kg given in equally divided doses for 7 to 14 days. In the treatment of β-hemolytic streptococcal infections, duration of at least 10 days is recommended. In severe infections, a total daily dose of 50 to 100 mg/kg may be administered in equally divided doses.

For the treatment of otitis media, the recommended daily dose is 75 to 100 mg/kg given in equally divided doses.

Side effects of Keflex

Get emergency medical help if you have signs of an allergic reaction to Keflex: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

severe stomach pain, diarrhea that is watery or bloody;

jaundice (yellowing of the skin or eyes);

easy bruising, unusual bleeding (nose, mouth, vagina, or rectum), purple or red pinpoint spots under your skin;

little or no urination;

agitation, confusion, hallucinations; or

severe skin reaction--fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.

Common Keflex side effects may include:

diarrhea;

dizziness, feeling tired;

headache, joint pain; or

vaginal itching or discharge.

Warnings of Keflex

Pregnancy

This medication should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while taking this medication, contact your doctor immediately.

Breast-feeding: This medication passes into breast milk. If you are a breast-feeding mother and are taking cephalexin, it may affect your baby. Talk to your doctor about whether you should continue breast-feeding.

Interactions

There may be an interaction between cephalexin and any of the following:

BCG

cholera vaccine

metformin

multivitamins with minerals

probenecid

sodium picosulfate

typhoid vaccine

warfarin

zinc

Allergy

Some people who are allergic to penicillin antibiotics also experience allergic reactions to cephalosporins, including cephalexin. Before you take cephalexin, inform your doctor about any previous adverse reactions you have had to medications, especially cephalosporins and penicillins. Contact your doctor at once if you experience signs of an allergic reaction, such as skin rash, itching, difficulty breathing, or swelling of the face and throat.

Bacterial resistance

Misuse of an antibiotic such as cephalexin may lead to the growth of resistant bacteria that will not be killed by the antibiotic. If this happens, the antibiotic may not work for you in the future. Although you may begin to feel better early in your course of treatment with cephalexin, you need to take the full course exactly as directed to finish ridding your body of the infection and to prevent resistant bacteria from taking hold. Do not take cephalexin or other antibiotics to treat a viral infection such as the common cold; antibiotics do not kill viruses, and using them to treat viral infections can lead to the growth of resistant bacteria.

Store Keflex at room temperature away from moisture, heat, and light.

Keflex

Please if you have any questions about KEFLEX® (Cephalexin), you can ask us by commenting below this text, we'll answer you as soon as possible.

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