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Omnicef is an antibiotic medication used to treat various bacterial infections such as respiratory, sinus, skin, and middle ear infections. It works by stopping the growth of bacteria.

  • Delivery time: Airmail (14-21 days) | EMS trackable (5-9 days)
  • Prescription: Included
  • Availability: In Stock

Omnicef Information

Omnicef Medication Information Leaflet

Common Use

Omnicef is commonly used to treat bacterial infections such as pneumonia, bronchitis, sinus infections, and certain skin infections. It is often prescribed when other antibiotics have proven ineffective.

Generic Ingredient

The generic ingredient for Omnicef is cefdinir.


Omnicef belongs to a class of antibiotics known as cephalosporins. It works by stopping the growth of bacteria.

Clinical Use

Omnicef is clinically used to treat a wide range of bacterial infections in both adults and children.

Spectrum Of Activity

Omnicef has a broad spectrum of activity against various bacterial strains including Streptococcus pneumoniae, Haemophilus influenzae, Moraxella catarrhalis, and certain strains of Staphylococcus aureus. However, it may not be effective against all types of infections.

Drug interaction

Omnicef may interact with certain medications such as probenecid, which can affect how Omnicef works or increase the risk of its side effects. It is important to inform your healthcare provider about all the medications you are taking.

Dosage and Directions

The dosage and directions for Omnicef should be followed as prescribed by the healthcare provider, typically based on the specific infection being treated and the patient's age and health condition.

Contraindications and Precautions

Omnicef is contraindicated in individuals with a known allergy to cephalosporin antibiotics. Precautions should be taken in patients with a history of gastrointestinal diseases or colitis. It should be used with caution in individuals with renal impairment or certain blood disorders.

Possible side effect

Common side effects of Omnicef may include diarrhea, nausea, headache, and vaginal itching or discharge. Serious side effects are rare but can include severe diarrhea, abdominal or stomach pain/cramping, and persistent sore throat or fever.

Missed dose and Overdose

If a dose of Omnicef is missed, it should be taken as soon as remembered. If it is almost time for the next dose, the missed dose should be skipped. An overdose of Omnicef may lead to severe nausea, vomiting, and diarrhea. In case of overdose, immediate medical attention should be sought.

Special Cases

In special cases such as pediatric use, the appropriate dosage of Omnicef should be determined by the child's weight and overall health condition. Additionally, in elderly patients, the dosage may need to be adjusted based on renal function.

Known Non-standard Use

Omnicef may be used in non-standard cases where other antibiotics are not effective, or as directed by a healthcare provider for off-label uses.

Patient Considerations

Patients should be advised to complete the full course of Omnicef as prescribed, even if their symptoms improve before the medication is finished. It is important to take the medication exactly as directed and not to skip doses.

Possible Risks

Using Omnicef may lead to the development of resistant bacteria over time. It is important to use this medication only as prescribed and to prevent its misuse or overuse to avoid the potential risk of developing resistance.

Breastfeeding and Pregnancy

It is important to notify the healthcare provider if pregnant or breastfeeding, as the use of Omnicef may need to be evaluated and the potential risks weighed against the benefits.

Known Alternatives

In situations where Omnicef may not be suitable, alternatives such as other cephalosporin antibiotics or different classes of antibiotics could be considered. The choice of alternative medication would depend on the specific bacterial infection and individual patient factors.


Omnicef should be stored at room temperature, away from light and moisture. It should be kept out of reach of children and pets.

Omnicef FAQ

What is Omnicef used for?

Omnicef is an antibiotic medication used to treat various bacterial infections such as sinusitis, pneumonia, bronchitis, ear infections, and skin infections.

How should I take Omnicef?

Omnicef should be taken exactly as prescribed by the doctor, usually with or without food. It's important to complete the full course of medication even if you feel better.

What are the possible side effects of Omnicef?

Common side effects of Omnicef may include diarrhea, nausea, vomiting, and stomach pain. Serious side effects such as severe stomach pain, persistent diarrhea, and signs of a new infection should be reported to the doctor.

Can I take Omnicef if I'm pregnant or breastfeeding?

It's important to inform the doctor if you are pregnant or breastfeeding before taking Omnicef, as they will weigh the potential risks and benefits before prescribing the medication.

What should I do if I miss a dose of Omnicef?

If you miss a dose of Omnicef, take it as soon as you remember. However, if it's almost time for the next dose, do not take the missed dose and continue with the regular dosing schedule.

Is it safe to give Omnicef to children?

Omnicef is generally safe for children when prescribed in the appropriate dosage for their age and condition. However, it's important to follow the doctor's recommendations and not to adjust the dosage without medical advice.

Can Omnicef interact with other medications?

Yes, Omnicef may interact with other medications such as antacids or iron supplements. It's important to inform the doctor about all the medications and supplements you are taking to avoid potential interactions.

How long does it take for Omnicef to start working?

Omnicef may start working within a few days, but it's important to continue the full course of medication as prescribed by the doctor to ensure the infection is completely treated.

What should I tell my doctor before starting Omnicef?

Before starting Omnicef, it is important to inform the doctor about any existing medical conditions, allergies, pregnancy or breastfeeding, and all the medications and supplements being taken.

Is it possible to overdose on Omnicef?

Overdose of Omnicef can lead to symptoms such as nausea, vomiting, stomach pain, and diarrhea. It's important to seek medical help immediately if an overdose is suspected.

Can I drink alcohol while taking Omnicef?

It's generally recommended to avoid alcohol while taking Omnicef as it may increase the risk of certain side effects such as stomach upset and dizziness.

What lifestyle or dietary changes should I make while taking Omnicef?

While taking Omnicef, it's important to stay hydrated, follow a balanced diet, and avoid prolonged exposure to sunlight as the medication may increase the skin's sensitivity to UV rays.

Is Omnicef available over the counter?

Omnicef is a prescription medication and is not available over the counter. It should be obtained with a valid prescription from a healthcare professional.

How should Omnicef be stored?

Omnicef should be stored at room temperature, away from light and moisture. It's important to keep the medication out of reach of children and pets.

Is there a generic version of Omnicef available?

Yes, the generic version of Omnicef is Cefdinir, which is also an antibiotic used to treat similar bacterial infections.

Omnicef Properties

  • Clinical use: Bacterial infections
  • Spectrum of activity: Broad-spectrum
  • Mechanism of action: Disrupts synthesis of the bacterial cell wall
  • Classification: Cephalosporin antibiotic
  • Recommended Dosage: 300 mg twice daily or 600 mg once daily
  • Basic Side Effects: Diarrhea, Headache, Nausea
  • Serious Side Effects: Allergic reactions, Severe colitis, Renal dysfunction

Omnicef Drug Class

Omnicef Other/Alternative Names


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