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Generic Name: cefdinir (SEF-di-nir)
Brand Name: Omnicef

Omnicef is used for:

Treating mild to moderate infections caused by certain bacteria.

Omnicef is a cephalosporin antibiotic. It works by killing sensitive bacteria.

Do NOT use Omnicef if:

  • you are allergic to any ingredient in Omnicef or any other cephalosporin antibiotic (eg, cephalexin)
  • you will be receiving or have recently received a live typhoid vaccine or bacille Calmette-Guérin (BCG) vaccine

Contact your doctor or health care provider right away if any of these apply to you.

Slideshow: Flashback: FDA Drug Approvals 2013

Before using Omnicef:

Some medical conditions may interact with Omnicef. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have had a severe allergic reaction (eg, severe rash, hives, difficulty breathing, dizziness) to a penicillin (eg, amoxicillin) or other beta-lactam antibiotic (eg, imipenem)
  • if you have a blood clotting disorder, kidney problems, seizures, diabetes, or stomach or bowel problems (eg, inflammation)

Some MEDICINES MAY INTERACT with Omnicef. Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Probenecid because it may increase the risk of Omnicef's side effects
  • BCG vaccine or a live typhoid vaccine because their effectiveness may be decreased by Omnicef

This may not be a complete list of all interactions that may occur. Ask your health care provider if Omnicef may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use Omnicef:

Use Omnicef as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • Omnicef may be taken with or without food. If stomach upset occurs, take it with food to reduce stomach irritation.
  • Do not take an antacid that has magnesium or aluminum in it within 2 hours before or after you take Omnicef.
  • Do not take a product that has iron in it within 2 hours before or after you take Omnicef.
  • Omnicef works best if taken at the same times each day.
  • To clear up your infection completely, take Omnicef for the full course of treatment. Keep taking it even if you feel better in a few days.
  • If you miss a dose of Omnicef, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Omnicef.

Important safety information:

  • Omnicef may cause drowsiness or dizziness. These effects may be worse if you take it with alcohol or certain medicines. Use Omnicef with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
  • Omnicef only works against bacteria; it does not treat viral infections (eg, the common cold).
  • Be sure to use Omnicef for the full course of treatment. If you do not, the medicine may not clear up your infection completely. The bacteria could also become less sensitive to this or other medicines. This could make the infection harder to treat in the future.
  • Long-term or repeated use of Omnicef may cause a second infection. Tell your doctor if signs of a second infection occur. Your medicine may need to be changed to treat this.
  • Mild diarrhea is common with antibiotic use. However, a more serious form of diarrhea (pseudomembranous colitis) may rarely occur. This may develop while you use the antibiotic or within several months after you stop using it. Contact your doctor right away if stomach pain or cramps, severe diarrhea, or bloody stools occur. Do not treat diarrhea without first checking with your doctor.
  • If you are taking Omnicef and a product that contains iron, your stools may turn a reddish color. This is normal and not a cause for concern.
  • Diabetes patients - Omnicef may cause the results of some tests for urine ketones or glucose to be wrong. Ask your doctor before you change your diet or the dose of your diabetes medicine.
  • Omnicef may interfere with certain lab tests (eg, Coombs tests). Be sure your doctor and lab personnel know you are using Omnicef.
  • Omnicef should be used with extreme caution in CHILDREN younger than 6 months old; safety and effectiveness in these children have not been confirmed.
  • PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Omnicef while you are pregnant. It is not known if Omnicef is found in breast milk. If you are or will be breast-feeding while you using Omnicef, check with your doctor. Discuss any possible risks to your baby.

Possible side effects of Omnicef:

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Diarrhea; headache; nausea.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); bloody stools; change in the amount of urine produced; dark urine; fever, chills, or sore throat; red, swollen, blistered, or peeling skin; seizures; severe or persistent diarrhea or vomiting; severe stomach pain or cramps; unusual bleeding or bruising; vaginal irritation or discharge; yellowing of the skin or eyes.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately. Symptoms may include diarrhea; seizures; severe nausea; stomach pain; vomiting.

Proper storage of Omnicef:

Store Omnicef at 77 degrees F (25 degrees C). Brief storage at temperatures between 59 and 86 degrees F (15 and 30 degrees C) is permitted. Store away from heat, moisture, and light. Do not store in the bathroom. Keep Omnicef out of the reach of children and away from pets.

General information:

  • If you have any questions about Omnicef, please talk with your doctor, pharmacist, or other health care provider.
  • Omnicef is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.
  • Check with your pharmacist about how to dispose of unused medicine.

This information should not be used to decide whether or not to take Omnicef or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about Omnicef. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to Omnicef. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using Omnicef.

Issue Date: September 3, 2014
Database Edition 14.3.1.003
Copyright © 2014 Wolters Kluwer Health, Inc.

Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

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