Keflex is a type of antibiotic medication. It works by keeping bacteria from growing and ending a bacterial infection. It’s classified as cephalosporin antibiotics. An antibiotic doesn’t work for treating a virus like a cold or influenza. It shouldn’t be taken for any infection that isn’t bacterial.

The generic name for it is cephalexin. This antibiotic is commonly used for patients needing an antibiotic before a dental procedure because of a specific heart condition. This can help them to avoid coming down with a bacterial infection of the heart. These are also known as endocarditis. This drug is also used for common bacterial infections that are already present.

Precautions and Warnings of Keflex

There are a lot of people who have allergic reactions to this medication, and that’s especially true in those who have a penicillin allergy. About 10% of patients with penicillin will also be allergic to Keflex. The types of allergic reactions can include a rash, toxic epidermal necrolysis, anaphylaxis, Stevens-Johnson syndrome, etc. It’s essential to pay attention to anything that changes after you’ve taken this antibiotic. If you have a severe allergic reaction, seek immediate medical care.

It’s also possible to have Clostridium difficile-associated diarrhea, better known as CDAD. Keflex is a cause, just like virtually all antibiotics. When Keflex is used to treat a bacterial infection, it can cause the C. difficile in the colon to grow overgrown. It can then produce toxins that can be highly damaging to the patient’s health. This is what causes CDAD in some patients. This can be mild, moderate, or extremely severe. It can lead to surgery for some patients and can be fatal. This condition can be set two months after stopping the Keflex or longer.

This medication also causes hemolytic anemia in some patients. If this develops, the Keflex should be stopped. There is also a potential for seizures from this medication, though this is rare. It happens most often in patients who have renal impairment. If it causes seizures, it should be discontinued. Anticonvulsant medication can be helpful in these cases.

Another possibility with Keflex is getting a drug-resistant bacterial infection. When this medication is taken when there isn’t necessarily a bacterial infection, it gives patients a higher risk of developing an overgrowth of drug-resistant bacteria. This happens when there’s no infection for the antibiotic to kill, so it starts to kill off the necessary bacteria in the body and ramp up the growth of resistant bacteria.

Keflex Side Effects

There are many side effects possible from this antibiotic. Many people don’t have any side effects, while others have side effects ranging from mild to severe.

If the medication is used many times or for an extended period, it can also cause a yeast infection or oral thrush. If you have severe diarrhea, cramping, or mucus or blood in your stool, tell your doctor immediately. These types of side effects shouldn’t be treated with an opioid medication or with an anti-diarrheal.

If you have the symptoms of an allergy to this medication, you may experience swelling of your face, throat, lips, or tongue. Tell the doctor as soon as possible if you’re allergic to this medication.

Some of the possible side effects include:

  • Tiredness
  • Diarrhea
  • Upset stomach
  • Headaches
  • Dizziness
  • Abdominal pain
  • Nausea
  • Swelling
  • Itching
  • Rash
  • Joint pain
  • Vomiting

Keflex Drug Interactions

Several interactions can occur when taking Keflex, and changes to specific tests can also happen. When a patient taking Keflex is given a urine glucose test or a Coombs test, the results may be altered by the medication. When you have lab tests done, make sure that the medical professionals know that you’re taking this drug.

Keflex can also have a bad interaction with a drug called dofetilide. It may also react poorly when the patient is taking metformin. This standard diabetes treatment is sometimes given to those on metformin, but it requires a prudent dosing strategy. These two drugs used together can cause a decrease in the renal clearance of the diabetes medication.

Another drug that can be a problem with Keflex is probenecid. This medication can stop Keflex from being excreted. It’s not recommended that these two medications be used simultaneously.

Strengths and Dosages of Keflex

This medication has various forms, and each comes in different dosages. Some capsules are meant for adults with 250 mg, 500 mg, and 750 mg strengths. There are also oral suspensions that come in 125 mg and 250 mg strengths. Some tablets come in strengths of 250 mg and 500 mg.

Keflex is also approved for children. There are different strengths available for pediatric patients who take it. There are capsules in strengths of 250 mg and 500 mg. There are pediatric oral suspensions that come in 125 mg and 250 mg. The tablets for pediatric patients come in 125 mg and 250 mg.

Adult DosagesPediatric Dosages
Capsules:250 mg, 500 mg, 750 mg250 mg, 500 mg
Oral suspensions:125 mg, 250 mg125 mg, 250 mg
Tablets:250 mg, 500 mg125 mg, 250 mg

It’s essential to take this medication exactly as it’s prescribed and not to keep any for any infections later. The entire course of the antibiotic must be taken to treat the bacterial infection. Stopping the medication early can put you at risk of getting an antibiotic-resistant infection.

FAQs of Keflex

What is Keflex used for?

It’s an antibiotic used to treat bacterial infections in adults and children.

Can Keflex treat a cold or the flu?

No, colds and the flu are viral infections, and antibiotics don’t affect viruses. It can only treat a bacterial infection or help prevent one from starting.

How long should I take this antibiotic?

It would be best if you only took it for the prescribed days. Don’t take it if it hasn’t been prescribed to you for your current problem. Taking too few doses can cause health problems, and too many can also result in problems.

Will this medication treat a UTI?

Yes, it is commonly prescribed to treat urinary tract infections. It often takes just a few days for it to kill the infection. However, the entire course of the antibiotic has to be taken.

Is Keflex the same as a penicillin drug?

It’s not technically a penicillin medication, but it can have a similar effect. Many people have penicillin allergies and are also allergic to Keflex.

Can you drink alcohol while taking it?

It’s best not to. If you drink while on this meditation, it can make it more likely that you’ll experience side effects like an upset stomach and nausea.

What is the cost of Keflex in America

The price of Keflex varies by the type of insurance you have, the strength of the medication, and the pharmacy from which you get it. There are so many iterations of Keflex that the price can get complicated. The oral capsules have different prices depending on the specific strength of the medication. The cost of 20 capsules at 250 mg is about $53, while the 500 mg dose is about $63 for the same number of capsules. Depending on many factors, a bottle of 30 capsules will cost between $70 and $80.

IMPORTANT NOTE: The information provided here is for educational purposes only and is not intended to serve as medical advice, diagnosis, or treatment recommendations. It should not be taken as an endorsement of any specific medication or treatment. Individual health conditions and responses to treatment can vary greatly; therefore, this information should not be seen as a guarantee of safety, suitability, or effectiveness for any particular individual. Always consult with a healthcare professional for personalized medical advice and before making any decisions regarding your health or treatment plans.

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