Prescription onlyLower-cost generic availableClass: Infection



Prescription onlyLower-cost generic availableClass: Infection
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Treats bacterial infections.

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Our bottom line

Omnicef (cefdinir) is good for treating many common bacterial infections.

Price and discounts
Best available price for 20 (300mg) capsules of cefdinir


  • Available as a generic, so it shouldn't be too expensive.
  • It is good at killing the most common bacteria.
  • Available in both pill and liquid forms.


  • Antacids and iron prevent Omnicef (cefdinir) from getting absorbed, so you'll need to separate any supplements from Omnicef (cefdinir) by at least 2 hours.
  • If you're taking iron with Omnicef (cefdinir), it can turn your stool red, which is normal but can be alarming.
  • Can cause diarrhea, nausea, vomiting, or headache.
  • The suspension has some sugar in it, which could raise your blood sugar. Talk to your doctor if you have diabetes.
How it works

Omnicef (cefdinir) is an antibiotic. It kills bacteria by preventing them from making their own protective covering.

What to expect when you take Omnicef (cefdinir) for Bacterial infection

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Side effect rates for Omnicef (cefdinir)

3841 From clinical trials of Omnicef / Bacterial infections (600 mg/day)
  • Diarrhea
  • Vaginal yeast infection
  • Nausea
  • Headache

Risks and Warnings for Omnicef (cefdinir)

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    • Higher risk if:
    • Taking Omnicef (cefdinir) for a long time

    Like all antibiotics, Omnicef (cefdinir) can cause diarrhea, but it normally goes away after you finish the medicine. Taking yogurt or probiotic supplements a few hours after taking Omnicef (cefdinir) may help. Rarely, Omnicef (cefdinir) can cause a severe form of diarrhea. If you still have diarrhea after finishing Omnicef (cefdinir), or your diarrhea worsens or becomes bloody, talk to your doctor right away.

Common concerns from people taking Omnicef (cefdinir)

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