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What is Cefdinir?

What is Cefdinir? Cefdinir 300 mg used for treating a wide variety of bacterial infections. Cefdinir doses are known as cephalosporin antibiotics. It works by stopping the growth of bacteria. Cefdinir usage treats only bacterial infections. Cefdinir and alcohol will not work for viral infections (such as common cold, flu). Using any antibiotic when it is not needed can cause it to not work for future infections.

How to use

  • Take Cefdinir doses by mouth with or without food as directed by your doctor.
  • Usually once a day or twice a day (every 12 hours).
  • The dosage is based on your medical condition and response to treatment.
  • For the best effect, take this Cefdinir and alcohol at evenly spaced times.
  • To help you remember, take Cefdinir doses at the same time(s) every day.

Continue to use this medication until the full prescribed amount is finished even if symptoms disappear after a few days. Stopping the medication too early may allow bacteria to continue to grow, which may result in a relapse of the infection. If you have any questions about what is Cefdinir or Cefdinir 300 mg used for? ask your doctor.

Some medications can bind with Cefdinir and alcohol preventing its full absorption. If you take antacids containing magnesium or aluminum, iron supplements, or vitamin/mineral products, take them at least 2 hours apart from cefdinir.

Inform your doctor if your condition persists or worsens.

Side effects

Diarrhea, headache, or nausea may occur. If any of these Cefdinir usage effects persist or worsen, notify your doctor or pharmacist promptly.

Cefdinir doses may cause your stools to turn a reddish color, especially if you also take iron products. This is harmless.

Remember that your doctor has prescribed Cefdinir usage because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Some serious and rare side effects

Tell your doctor right away if any of these rare but very serious side effects occur:

  • stomach/abdominal pain
  • persistent nausea/vomiting
  • yellowing eyes or skin
  • dark urine
  • unusual fatigue
  • new signs of infection
  • easy bruising/bleeding
  • signs of kidney problems
  • mental/mood changes (such as confusion).

Cefdinir doses may rarely cause a severe intestinal condition (Clostridium difficile-associated diarrhea) due to resistant bacteria. This condition may occur weeks to months after treatment has stopped. Do not use anti-diarrhea or opioid medications if you have the following symptoms because these products may make them worse. Tell your doctor right away if you develop: persistent diarrhea, abdominal or stomach pain/cramping, or blood/mucus in your stool.

Use of Cefdinir and alcohol for prolonged or repeated periods may result in oral thrush or a new vaginal yeast infection (oral or vaginal fungal infection). Contact your doctor if you notice white patches in your mouth, a change in vaginal discharge, or other new symptoms.

A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs.

Warnings & Precautions

  1. Before taking Cefdinir doses, tell your doctor or pharmacist if you are allergic to them.
  2. Before Cefdinir usage, tell your doctor or pharmacist your medical history.
  3. Do not have any immunizations/vaccinations while using this medication.
  4. Before having surgery, tell your doctor or dentist about all the products you use.

Cefdinir and alcohol should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor.

Cefdinir usage does not pass into breast milk. Consult your doctor before breastfeeding.


Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.

Drug interactions

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor’s approval.

Cefdinir usage may cause false-positive results with certain diabetic urine testing products (cupric sulfate-type). This drug may also affect the results of certain lab tests. Make sure laboratory personnel and your doctors know you use this drug.



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