Cefdinir, Oral

What are other names for this medicine?

Type of medicine: cephalosporin antibiotic

Generic and brand names: cefdinir, oral; Omnicef

What is this medicine used for?

This medicine is a kind of antibiotic called a cephalosporin. It is used to treat infections caused by bacteria. It does not cure viral infections such as colds and the flu. This medicine may also be used during and after surgery to decrease the risk of infection.

What should my health care provider know before I take this medicine?

If you are allergic to penicillin, you may be allergic to this medicine. Tell your health care provider if you are allergic to any medicines.

Tell your health care provider if you have any urinary problems. This medicine may cause seizures (convulsions) in people with kidney disease. If you have seizures, contact your health care provider right away.

Tell your health care provider if you have any bleeding problems.

Females of childbearing age: Tell your health care provider if you are pregnant or plan to become pregnant. Do not breast-feed while taking this medicine without your health care provider's approval.

How do I take it?

This medicine may come in different forms. You may take the tablets with or without food. Taking it with meals may lessen the chance the drug will upset your stomach.

If you have the liquid form, shake the bottle well before pouring a dose. Take the liquid with food.

This medicine is most effective when taken in evenly spaced doses, day and night. You may need to take it for 10 days or more, especially for serious strep infections.

Take this medicine for as long as your health care provider prescribes, even if you feel better. If you stop taking the medicine too soon, the infection may return.

Do not miss a dose. If you miss a dose, take it as soon as you remember unless it is almost time for the next scheduled dose. In that case, skip the missed dose and take the next one as directed. Do not take double doses. If you are not sure of what to do if you miss a dose, or if you miss more than one dose, contact your health care provider.

What should I watch out for?

Contact your health care provider if your condition does not improve in a few days or if it gets worse.

If you develop diarrhea, check with your health care provider or pharmacist before taking any medicine for it.

Do not use this medicine for other infections without your health care provider's approval.

You may develop a different infection while you are taking this medicine. Report any signs of infection to your health care provider.

Diabetics: This medicine may affect urine sugar test results. Talk to your health care provider about urine and blood sugar tests while you are taking this medicine.

What are the possible side effects?

Along with its needed effects, your medicine may cause some unwanted side effects. Some side effects may be very serious. Some side effects may go away as your body adjusts to the medicine. Tell your health care provider if you have any side effects that continue or get worse.

Life-threatening (Report these to your health care provider right away. If you cannot reach your health care provider right away, get emergency medical care or call 911 for help): Allergic reaction (hives; itching; rash; trouble breathing; tightness in your chest; swelling of your lips, tongue, and throat).

Serious (report these to your health care provider right away): Severe stomach cramps, severe diarrhea, fever, nausea, vomiting, thirst, seizures.

Other: Mild diarrhea, mild stomach upset, sore mouth or tongue, mild rash, vaginal itching or discharge.

What products might interact with this medicine?

When you take this medicine with other medicines, it can change the way this or any of the other medicines work. Nonprescription medicines, vitamins, natural remedies, and certain foods may also interact. Using these products together might cause harmful side effects. Talk to your health care provider if you are taking:

• antacids, such as Maalox, Mylanta, and Gaviscon (Take antacids 2 hours apart from doses of this medicine.)
• aminoglycoside antibiotics such as kanamycin (Kantrex), neomycin (Mycifradin), streptomycin, gentamicin (Garamycin), and tobramycin (Nebcin)
• blood thinners such as warfarin (Coumadin) and anisindione (Miradon)
• heartburn medicines such as cimetidine (Tagamet), ranitidine (Zantac), famotidine (Pepcid, Pepcid AC, Pepcid Complete), and nizatidine (Axid)
• iron medicines (take 2 hours apart from this medicine)
• loop diuretics, such as furosemide (Lasix) and ethacrynic acid (Edecrin)
• probenecid (Benemid).

Keep a list of all your medicines (prescription, nonprescription, supplements, natural remedies, and vitamins) with you. Be sure that you tell all health care providers who treat you about all the products you are taking.

How should I store this medicine?

Store the liquid in the refrigerator or at room temperature. Keep the container tightly closed. Protect it from heat, high humidity, and bright light. Do not let it freeze. Dispose of any liquid left over after 14 days.

This advisory includes selected information only and may not include all side effects of this medicine or interactions with other medicines. Ask your health care provider or pharmacist for more information or if you have any questions.

Ask your pharmacist for the best way to dispose of outdated medicine or medicine you have not used. Do not throw medicine in the trash.

Keep all medicines out of the reach of children.

Do not share medicines with other people.