Cephalexin 500 mg


Antibiotic Cephalexin | Cephalexin

Cephalexin is a broad-spectrum antibiotic commonly used to treat bacterial infections such as skin infections, urinary tract infections, and respiratory infections. It works by stopping the growth of bacteria. Common side effects include diarrhea, nausea, and stomach pain. It should be taken as prescribed by a healthcare provider to ensure effectiveness and minimize the risk of antibiotic resistance.


Generic name: cephalexin [ sef-a-LEX-in ]
Brand names: Keflex, Biocef, Zartan, Panixine, Daxbia
Dosage forms: oral capsule (250 mg; 500 mg; 750 mg), oral powder for reconstitution (125 mg/5 mL; 250 mg/5 mL), … show all 3 dosage forms
Drug class: First generation cephalosporins

Best online pharmacy No prescription have been Since the introduction of the Internet, there has been a revolution in the way that products are marketed and sold to consumers. Pharmaceutical goods are no exception, and No prescription online pharmacies or Internet pharmacies have arisen in response.

Online pharmacies are businesses which sell medicines including those which require a prescription, on the Internet. It is estimated that 1 in 6 US consumers have bought pharmaceutical drugs online. Online sales of drugs have grown rapidly, often driven by the lower price point of online pharmacies.

It cannot be doubted, however, that a high degree of integrity is required to maintain health standards and fulfil the ethical responsibility to provide optimal care for patients.


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You should not use this medicine if you are allergic to cephalexin or to similar antibiotics, such as Ceftin, Cefzil, Omnicef, and others. Tell your doctor if you are allergic to any drugs, especially penicillins or other antibiotics.

Before taking this medicine

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

  • cefaclor (Ceclor, Raniclor);
  • cefadroxil (Duricef);
  • cefazolin (Ancef, Kefzol);
  • cefdinir (Omnicef);
  • cefditoren (Spectracef);
  • cefpodoxime (Vantin);
  • cefprozil (Cefzil);
  • ceftibuten (Cedax);
  • cefuroxime (Ceftin); and others

To make sure cephalexin is safe for you, tell your doctor if you have ever had

  • an allergy to any drug (especially penicillin);
  • liver or kidney disease; or
  • intestinal problems, such as colitis.

Cephalexin is not expected to be harmful to an unborn baby. Tell your doctor if you are pregnant.

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

How should I take cephalexin?

Take cephalexin exactly as prescribed by your doctor. Follow all directions on your prescription label and read all medication guides or instruction sheets.

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

Measure liquid medicine carefully. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon).

Use cephalexin for the full prescribed length of time, even if your symptoms quickly improve. Skipping doses can increase your risk of infection that is resistant to medication. This medicine will not treat a viral infection such as the flu or a common cold.

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

This medicine can affect the results of certain medical tests. Tell any doctor who treats you that you are using this medicine.

Store the tablets and capsules at room temperature away from moisture, heat, and light.

Store the liquid medicine in the refrigerator. Throw away any unused liquid after 14 days.

What happens if I miss a dose?

Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose?

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.

What to avoid

Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you have diarrhea that is watery or bloody, call your doctor before using anti-diarrhea medicine.

Cephalexin side effects

Get emergency medical help if you have signs of an allergic reaction to cephalexin (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).

Call your doctor at once if you have:

  • severe stomach pain, diarrhea that is watery or bloody (even if it occurs months after your last dose);
  • unusual tiredness, feeling light-headed or short of breath;
  • easy bruising, unusual bleeding, purple or red spots under your skin;
  • a seizure;
  • pale skin, cold hands and feet;
  • yellowed skin, dark colored urine;
  • fever, weakness; or
  • pain in your side or lower back, painful urination.

Common cephalexin side effects may include:

  • diarrhea;
  • nausea, vomiting;
  • indigestion, stomach pain; or
  • vaginal itching or discharge.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect cephalexin?

Tell your doctor about all your other medicines, especially:

  • metformin; or
  • probenecid.

This list is not complete. Other drugs may interact with cephalexin, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

Popular FAQ

More FAQ

  • Can Cephalexin treat an abscess in the mouth or gum infection?
  • If people are allergic to amoxicillin can they take cephalexin?
  • Can you take cephalexin for a spider bite?
  • Can you take antibiotics while pregnant?
  • Cephalexin – is this a drug that can be abused by teens?

View more FAQ

More about cephalexin

Patient resources

  • Cephalexin Capsules and Tablets patient information
  • Cephalexin Suspension

Other brands

Keflex, Biocef

Professional resources

  • Cephalexin monograph
  • Cephalexin (FDA)
  • Cephalexin Suspension (FDA)
  • Cephalexin Tablets (FDA)

Other brands


Related treatment guides

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use cephalexin only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Legally, Best online pharmacy No Prescription must be licensed in any region where consumers may make a purchase, although the exact regulations vary according to the country or state of practice. Additionally, the physical premises of online pharmacies selling to some countries, such as the United States, must be based in the country to which the sales takes place.

The involvement of a doctor for a consultation with the patient is usually required for all licensed online pharmacies to dispense a prescribed drug. Therefore, an online form of patient-reported symptoms is insufficient in most countries.

Reasons for the Trend towards Online Pharmacies
Studies have revealed that even best online pharmacy without prescription drugs are available online without a prescription. Why would users shift to this non-traditional way of supplying their legitimate need for a prescription drug, away from the approved system of a doctor’s office visit, obtaining a prescription and getting it filled at the community pharmacy? In many cases, the process of obtaining and filling a prescription was seen as more expensive and cumbersome than buying the same drug online. The medical system was seen as less responsive to the patient’s needs in the sense of not providing sufficient doses of the required medication. Anonymity was another consideration.

Risks and Benefits of Cephalexin is a broad-spectrum antibiotic:
There is no doubt that online pharmacies can be of great benefit for patients in some instances. This is particularly so for individuals who live in rural or remote areas, or for those who may have difficulty in gaining access to a traditional community pharmacy. Online pharmacies can also increase convenience of purchase of medicines, and have an economic benefit for many consumers, regardless of location.

However, online pharmacies are not without their own risks. Of particular concern is the high incidence of counterfeit or sub-optimal quality pharmaceutical goods sold online, when compared to a community pharmacy. In most cases, patients are unable to recognize differences in the appearance of drugs until they feel the effects after the administration of the dose. Packaging or labeling may be misleading or inappropriate.

Additionally, the pharmacist-patient interaction is usually less focused or non-existent in an online environment, which could potentially result in misinformed patients and increased likelihood of medication errors. A study has even shown a higher risk of adverse effects when prescription painkillers were purchased No prescription online pharmacies without prescription online, as compared to traditional routes of purchase via prescription at a physician’s office.

This phenomenon has been postulated to be the effect of unsupervised dosages, the interactions with other medications and the inappropriate conditions of use of these drugs.

The provision of advice to patients about health and the safe dosage, administration, side-effects and interactions of the medications they ask for, whether over-the-counter or on prescription, is one of the central roles of a pharmacist. It is important that this is not compromised with the implementation of the online pharmacy business model.

The way in which advice is offered can vary between different pharmacies. Although most No prescription online pharmacies include a written consumer medicine information (CMI) leaflet, it is feared that in practice many patients may not take the time to comprehend the important information in it. Thus a CMI may suffice in some cases, but online pharmacies may need to make additional contact by phone, particularly for complicated cases that are more likely to be associated with potential issues.

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