Omnicef antibiotic prescription available online 

If you are suffering from different infections caused by bacteria, the antibiotic medication cefdinir can help. Get a new prescription or refill of cefdinir from a caring, board-certified doctor online.*

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Treats a variety of bacterial infections

Available as a capsule and powder for suspension

Convenient online Omnicef prescriptions

*Prescriptions are provided at the doctor’s discretion. Learn more about our controlled substances policy and how you can save up to 80% with our prescription discount card.

About Omnicef (cefdinir) 

Cefdinir is considered a third-generation cephalosporin antibiotic, which functions by killing bacteria. The mechanism of action involves inhibiting bacterial cell wall synthesis by binding to penicillin-binding proteins.

Like any antibiotic, this medication can only be used for bacterial infections. It is ineffective against colds, flu, and other viral infections because it will not destroy viruses, only bacteria.

Some conditions that cefdinir is known to treat include bacterial infections such as bronchitis, pneumonia, and others. Cefdinir is available only by prescription. It is available in a generic formulation under different brand names, including Omnicef Omni-Pac.

Cefdinir may be prescribed as a capsule and powder for suspension (liquid) to take by mouth. It’s always important to follow the specific instructions on your prescription, as they can vary based on the formulation and dosage you are prescribed.

If you are prescribed Omnicef or cefdinir orally, complete the entire course of the cephalosporin antibiotic unless your doctor specifically tells you to stop.

The cephalosporin antibiotic may only fully treat your bacterial infection if you complete your prescription. 

Cefdinir uses

There is one FDA-approved use for cefdinir oral, and it is to treat a variety of mild to moderate infections resulting from bacteria, but it may also be used off-label to treat other conditions. Your online medical professional may prescribe Omnicef for any of the following common reasons.

It’s also possible that your healthcare provider may prescribe it for other reasons not listed here. If you have questions about why a medication is prescribed, ask your online doctor or pharmacist.

  • Variety of infections caused by bacteria

    Cefdinir oral is prescribed to treat a wide range of bacterial infections, including community-acquired pneumonia, acute exacerbations of chronic bronchitis, acute maxillary sinusitis, pharyngitis/tonsillitis, and uncomplicated infections of skin and skin structures.

    Additionally, cefdinir is used to treat infections caused by bacteria of the middle ear (e.g. acute bacterial otitis media) and bacterial urinary tract infections, and other types of infections caused by bacteria.

    Cefdinir works by killing bacteria or preventing their growth. As with other cephalosporin antibiotics, Omnicef manages infections produced by gram-positive and gram-negative bacteria.

  • Pediatric fever without a source

    An off-label use of cefdinir is for the treatment of pediatric fever without a source. It is an acute febrile illness in an infant or young child wherein the cause is not apparent.

Cefdinir side effects

The side effects associated with taking cefdinir are typically mild to severe. Most cefdinir side effects are associated with nausea and vomiting.

  • Cefdinir has some common side effects. They may include:

    • Nausea and/or vomiting

    • Stomach pain

    • Diarrhea

    • Vaginal itching or discharge

    • Rash (including diaper rash in children)

    • Headache

    • Indigestion

    • Dizziness

    Other side effects, which are less common but might be more severe, could include:

    • Signs of liver disease such as persistent nausea/vomiting, loss of appetite, abdominal pain, dark urine, and yellowing of eyes and skin

    • Unusual tiredness

    • New signs of infection

    • Easy bruising and bleeding

    • Signs of renal impairment (kidney problems), such as changes in the amount of urine

    • Mental and mood changes such as confusion

    • Severe intestinal disease indicated by persistent diarrhea, stomach pain or cramping, ad blood/mucus in stool

    • Oral thrush

    • Allergic reaction

    You should call your doctor if you notice any of these side effects or if you develop any other new or concerning symptoms.

How to take cefdinir

Your pharmacist will provide you with instructions on how to take your cefdinir prescription.

Be sure to read your prescription label and follow the instructions. Call your doctor or pharmacy if you have any questions or need more drug information.

Cefdinir can come in different forms and doses, so be sure to follow the specific instructions on your prescription. It is typically prescribed twice a day, i.e. every 12 hours. Some specific instructions may include taking 300 mg capsule every 12 hours or 600mg once a day, for adolescents and adults.

For infants taking liquid Cefdinir and children six months up to 12 years of age, the dosage is based on body weight. It is usually 7mg per kg of body weight every 12 hours or 14mg per kg of body weight per day. The dosage is not higher than 600mg a day.

Cefdinir is taken five to 10 days.

What to avoid while taking cefdinir

Cefdinir has 44 drug interactions. Omnicef may interact with aluminum- or magnesium-containing antacids, probenecid, and iron supplements and foods fortified with iron. Cefdinir may cause false positive results with some diabetic urine testing products.

Additionally, cefdinir could affect the results of some lab tests, including a false-positive reaction for ketones in urine with tests using nitroprusside.

Don’t change what you are taking without checking with your doctor or pharmacist. That includes other medications or supplements, as well as over-the-counter drugs.

It is important to follow the doctor’s or pharmacist’s instructions when taking cefdinir. Inform laboratory personnel about cefdinir use if you are scheduled to do certain lab tests.

They will tell you whether you can do medical tests when taking the antibiotic or if you will need to wait for the treatment course to finish first.

Ask your doctor or pharmacist if it is acceptable to consume alcohol while taking cefdinir.

Some research shows that regular alcohol consumption may exacerbate the side effects of cefdinir, make your symptoms worse, and cause severe drowsiness. Alcohol may also reduce the medication’s ability to do its job, making it harder to treat bacterial infections.

Avoid taking mineral supplements within two hours before or after taking the usual dose of cefdinir.

Medication alternatives to cefdinir

If your healthcare provider prefers to put you on another treatment altogether, they may suggest another cephalosporin antibiotic or an antibiotic in another drug class. Here are some common doctor-recommended alternatives based on your health issue:

Cefdinir prescription FAQs

  • How much does cefdinir cost?

    The cost of Cefdinir varies from one pharmacy to another. The price for 14 Cefdinir capsules (300mg) is around $24, but in some places, it can go higher than that. For example, a pack of 20 Cefdinir capsules of the same dosage is around $100 in some pharmacies.

  • How can I refill my Cefdinir prescription?

    Like other antibiotics, Omnicef use is short-term only. To get a refill, it is necessary to see a doctor. If a healthcare professional believes it’s necessary to take an additional course of antibiotics, they will request a refill.

    While you can also go to a pharmacy, they still need to contact your doctor.

    For many people, the easiest way to get a Cefdinir prescription refill is to see a doctor online. Book a virtual appointment with one of our top rated board-certified doctors today.

  • Who should not take cefdinir?

    People who experience an allergic reaction to cefdinir or any other cephalosporin antibiotic shouldn’t use Omnicef. Also, persons with a history of colitis, severe diarrhea, diabetes, and kidney disease shouldn’t use cefdinir without a doctor's approval.

    Suspension contains sucrose. You shouldn’t take liquid cefdinir if you have diabetes unless a healthcare provider says it’s okay.

    While studies regarding the use of cefdinir in pregnancy or when breastfeeding is lacking, you shouldn’t take the antibiotic before receiving approval from a doctor. A good thing to know is that cefdinir isn’t detected in breast milk.

    You shouldn't take medicine if you're taking antacids or some supplements to avoid drug interactions. If you're concerned about drug interactions, make sure to consult a doctor about this issue before you receive a prescription for Omnicef.

  • Can cefdinir make you tired?

    Yes, cefdinir can make you tired. Tiredness can be a symptom of infection treated by the antibiotic or a side effect of cefdinir. Indeed, one of several adverse effects of this medicine is feeling tired.

  • Does cefdinir have to be taken exactly 12 hours apart?

    Cefdinir is usually prescribed twice a day i.e. 12 hours apart. Ideally, you should stick to the dosage schedule and take it every 12 hours to get the most out of this medication. That way, cefdinir’s effects spread out evenly over the course of the day.

  • Why do you have to throw away cefdinir after 10 days?

    Patients receiving cefdinir oral should throw it away after 10 days because using old or expired antibiotics leads to antibiotic resistance. It could also pave the way for developing other infections.

  • What happens if I miss a dose of cefdinir?

    If you miss a dose of cefdinir oral, take it as soon as possible. But, if the time for the scheduled next dose is near, you should skip the missed dose. Just proceed to take the usual next dose and continue with the regimen. Avoid taking double doses to make up for the missed dose.

  • What happens if I take too much cefdinir?

    If you take too much cefdinir orally, call the local Poison Control center line or seek emergency medical attention. This is particularly important if you experience seizures, diarrhea, stomach pain, nausea, and vomiting.

3 simple steps to request your cefdinir prescription today 

Step 1

Book a cefdinir prescription request appointment.

Book a same day appointment from anywhere.

Step 2

Talk to your medical provider regarding your cefdinir prescription.

Visit with a doctor on your smartphone or computer.

Step 3

Pick up your cefdinir prescription.

We can send prescriptions to any local pharmacy.

Cefdinir prescription pricing details

How pricing works

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First month free



30 days of free membership

  • Same-day appointments 7 days a week

  • Unlimited messages with your Care Team

  • Prescription discount card to save up to 80%

  • Exclusive discounts on lab tests

  • Free memberships for your family

  • Cancel anytime

Visit price without insurance

Initial visits are $129.

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