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| Keflex 250 mg |
Brand Name: Keflex
Generic Name: Leximark, Cephadex, Rofex
Manufacturer: Eli Lilly
Diseases: Infections
Dosage: 250mg / 500mg / 750mg
Keflex Cephalexin is commonly prescribed to treat and prevent bacterial infections. A few of the infections that the drug can treat are respiratory tract infections, sinus infections, and skin infections. It can also prevent heart valve infections. Keflex comes in both capsule and liquid form, and is usually taken two to four times a day. Common side effects include diarrhea, headache, and nausea.
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| Keflex 500 mg |
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| Keflex 750 mg |
Keflex is in a group of drugs called cephalosporin antibiotics. Keflex fights bacteria in the 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 other purposes not listed in this medication guide.
What is the most important information I should know about Keflex?
Do not use Keflex if you are allergic to cephalexin, or to similar antibiotics, such as Ceclor, Ceftin, Cefzil, Duricef, Fortaz, Omnicef, Spectracef, Suprax, and others.
Before using Keflex, tell your doctor if you are allergic to any drugs (especially penicillins), or if you have kidney or liver disease, a stomach or intestinal disorder such as colitis, diabetes, or if you are malnourished.
Take this medication for the entire length of time prescribed by your doctor. Your symptoms may get better before the infection is completely treated. Keflex will not treat a viral infection such as the common cold or flu.
What should I discuss with my healthcare provider before taking Keflex?
Do not use Keflex if you are allergic to cephalexin, or to other cephalosporin antibiotics, such as:
- cefaclor (Ceclor);
- cefadroxil (Duricef);
- cefdinir (Omnicef);
- cefditoren (Spectracef);
- cefixime (Suprax);
- cefprozil (Cefzil);
- ceftazidime (Fortaz); or
- cefuroxime (Ceftin).
- kidney disease;
- liver disease;
- a stomach or intestinal disorder such as colitis;
- diabetes; or
- if you are malnourished.
The oral suspension (liquid) form of Keflex may contain sugar. This may affect you if you have diabetes.
FDA pregnancy category B. 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. Do not use Keflex without telling your doctor if you are breast-feeding a baby.
How should I take Keflex?
Take the medication exactly as it was prescribed for you. Do not use the medication in larger amounts, or use it for longer than recommended by your doctor. Follow the instructions on your prescription label.
Take Keflex with a full glass of water.
Dissolve the Keflex dispersible tablet in a small amount of water, about 2 teaspoonfuls. Stir this mixture and drink all of it right away. To make sure you get the entire dose, add a little more water to the same glass, swirl gently and drink right away. Do not swallow or chew a dispersible tablet.
Shake the oral suspension (liquid) well just before you measure a dose. To be sure you get the correct dose, measure the liquid with a marked measuring spoon or medicine cup, not with a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist for one. Take Keflex for the entire length of time prescribed by your doctor. Your symptoms may get better before the infection is completely treated. Keflex will not treat a viral infection such as the common cold or flu.
This medication can cause you to have unusual results with certain medical tests. Tell any doctor who treats you that you are using Keflex.
Store the tablets and capsules at room temperature away from moisture and heat. Store the liquid medicine in the refrigerator. Throw away any unused medication after 14 days.
Keflex Dosage
The dose of Keflex for adults is 1 to 4 grams in divided doses. Children are treated with 25-100 mg/kg/day in divided doses.
Availability Keflex Dosage
Keflex antibiotic is prescribed as Tablets: 250 and 500 mg, and 1 g. Capsules: 250, 333, 500 and 750 mg. Keflex Powder for Suspension: 125, and 250 mg/5 ml.
What happens if I miss a dose?
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at your next regularly scheduled time. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention if you think you have used too much of this medicine.
Overdose symptoms may include nausea, vomiting, stomach pain, diarrhea, and blood in your urine.
What should I avoid while taking Keflex?
Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you have diarrhea that is watery or has blood in it, call your doctor. Do not use any medicine to stop the diarrhea unless your doctor has told you to.
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Common Side Effects of Keflex
Keflex has been studied extensively in clinical trials, with thousands of people worldwide having been evaluated. In these studies, side effects are always documented and compared to people not taking the medicine. This way, it is possible to see what side effects occurred, how often they occurred, and how they compared to the group taking a placebo (a "sugar pill" without any active ingredients).
Based on these studies, the most common Keflex side effects occurring in either adults or children included:
- Diarrhea
- Headache
- Upset stomach (dyspepsia)
- Nausea
- Confusion
- Dizziness
- Unexplained rash
- Yeast infection.
Some side effects of Keflex can indicate a serious problem. If you experience any of these problems, stop taking Keflex and call your healthcare provider. These side effects include but are not limited to:
- Hives
- Severe or watery diarrhea
- Blood in stools
- Throat or mouth sores
- Unexplained bleeding or bruising
- Severe rash
- Itching
- Wheezing
- Difficulty breathing or swallowing
- Swelling of the throat
- Peeling of the skin.
Rare Keflex side effects occur in less than 1 percent of people taking the drug. Because these side effects are so uncommon, it is difficult to tell whether they are because of the medication or something else.
Some of these possible side effects include but are not limited to:
- Hallucinations
- Fatigue
- Joint pain
- Bloody diarrhea
- Vomiting
- Anemia
- Low platelets in the blood (thrombocytopenia)
- Vaginal discharge
- Confusion
- Seizures
- Serious intestinal infection (enterocolitis).
You may experience some or none of the side effects listed in this article. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have side effects from a medicine that you have never tried. Therefore, make sure to let your healthcare provider know if you develop any side effects while taking the drug. Also let your healthcare provider know if you develop something that "just does not seem right." While it may not be a side effect of Keflex, your healthcare provider will be able to diagnose and treat the problem.
What other drugs will affect Keflex?
Before using Keflex, tell your doctor if you are using any of the following drugs:
- a blood thinner such as warfarin (Coumadin);
- metformin (Fortamet, Glucophage, Riomet, Actoplus, Avandamet, Metaglip); or
- probenecid (Benemid).
Keflex Allergy
Individuals who are allergic to penicillin may also be allergic to Keflex.
STORAGE: Store at room temperature away from moisture and sunlight. Do not store in the bathroom.
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