Is cefdinir stronger than amoxicillin?

Neither antibiotic is universally "stronger" — they work differently and cover different bacteria. Cefdinir is a third-generation cephalosporin with broader coverage against some bacteria, while amoxicillin is often preferred first for infections like strep throat. Your provider chooses based on the infection, local resistance patterns, and your allergy history.

What's the difference between cefdinir vs amoxicillin?

Both treat common bacterial infections such as sinusitis, ear infections, and strep throat, but amoxicillin is a penicillin and cefdinir is a cephalosporin. Cefdinir is sometimes used when amoxicillin hasn't worked or when a penicillin allergy makes amoxicillin unsuitable, though your provider will assess cross-reactivity risk.

What's the difference between cefdinir vs cephalexin?

Both are cephalosporin antibiotics, but cephalexin is first-generation and cefdinir is third-generation, so they target somewhat different bacteria. Cephalexin is often used for skin infections and UTIs, while cefdinir is commonly prescribed for respiratory infections like sinusitis and pneumonia.

Do I need a prescription for cefdinir 300mg?

Yes. Cefdinir is a prescription-only antibiotic in the United States. A licensed healthcare provider must evaluate your infection and issue a valid prescription before this medication can be dispensed.

How does ordering and shipping work?

After you place your order and provide your prescription (or complete a provider consultation where available), a licensed pharmacist reviews it for safety and accuracy. Once approved, your medication ships from a licensed U.S. pharmacy directly to your address.

Can I take cefdinir with antacids or iron supplements?

Antacids containing aluminum or magnesium, and iron supplements, can reduce how much cefdinir your body absorbs. Take cefdinir at least 2 hours before or after these products. Iron may also cause harmless reddish-colored stools.

What should I do if I miss a dose?

Take the missed dose as soon as you remember, unless it's almost time for your next dose — in that case, skip it and resume your regular schedule. Do not double up doses, and finish the full course as prescribed.

Cefdinir 300mg

Name: Cefdinir 300mg
Brand: All Family Pharmacy
SKU: cefdinir-300mg
Availability: InStock

Generic For: Omnicef

4.8 Google Star Rated · 200,000+ Orders Shipped

Cefdinir 300mg (brand name Omnicef) is a cephalosporin antibiotic prescribed for bacterial infections such as sinusitis, community-acquired pneumonia, strep throat, and skin infections. Many patients compare cefdinir vs amoxicillin — both treat similar infections, but cefdinir belongs to a different antibiotic class and may be chosen when penicillins aren't appropriate. After a licensed provider reviews your prescription, your medication ships from a licensed U.S. pharmacy.

Select Quantity *

20 Capsules 40 Capsules 60 Capsules 80 Capsules

10-day supply · $1.50/capsule

How It Works

Select your medication
Licensed providers review & prescribe
Our licensed U.S. pharmacists fill your prescription
Delivered to you as soon as the next day

Price: $30.00

HSA/FSA Eligible

Get Started

*Doctor visit fee & delivery cost not included in price. Refills at provider discretion.

Pharmacist Support Fast Shipping Licensed U.S. Pharmacy

Buy Cefdinir 300mg (Omnicef) Online

A cephalosporin antibiotic for sinus infections, pneumonia, and strep throat

Medically reviewed by David Paul Mackarey, RPh, Pharmacist-in-Charge

Cefdinir 300mg Quick Facts

Drug class	Cephalosporin antibiotic
Treats	Sinus infections, pneumonia, strep throat, skin infections
Form	Capsule
Typical dosing	Take 2 capsules by mouth daily for 7 days.
Prescription required	Yes — prescription only

What Is Cefdinir 300mg?

Cefdinir is a third-generation cephalosporin antibiotic that works by stopping bacteria from building their cell walls. It is FDA-approved to treat a range of mild to moderate bacterial infections in adults and children. People often ask about cefdinir vs amoxicillin or cefdinir vs cephalexin — all three fight bacterial infections, but they belong to different classes or generations and cover somewhat different bacteria, so the right choice depends on your specific infection. Cefdinir is only effective against bacteria and will not treat viral illnesses like colds or the flu.

What Does Cefdinir 300mg Treat?

Acute bacterial sinusitis (sinus infection)
Community-acquired pneumonia
Pharyngitis and tonsillitis (including strep throat)
Acute exacerbations of chronic bronchitis
Uncomplicated skin and skin structure infections
Acute bacterial otitis media (middle ear infection)

Cefdinir 300mg Dosage

Pneumonia or skin infections: 300 mg by mouth every 12 hours for 10 days.
Sinusitis: 300 mg by mouth every 12 hours, or 600 mg once daily, for 10 days.
Pharyngitis/tonsillitis: 300 mg every 12 hours for 5–10 days, or 600 mg once daily for 10 days.

Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.

Cefdinir 300mg Side Effects

Common side effects

Diarrhea
Nausea
Headache
Vaginal yeast infection (candidiasis)
Abdominal pain
Rash
Vomiting

Serious side effects

Stop taking this medication and seek medical attention right away if you experience:

Severe allergic reaction (hives, swelling, trouble breathing)
Severe or persistent watery/bloody diarrhea (possible C. difficile infection)
Severe skin reactions (blistering, peeling rash)
Unusual bleeding or bruising
Seizures (especially with kidney impairment)

Warnings & Interactions

Do not take if allergic to cefdinir or other cephalosporin antibiotics
Use caution with a history of penicillin allergy — cross-reactivity is possible
May cause C. difficile-associated diarrhea, during or after treatment
Take antacids containing aluminum/magnesium or iron supplements at least 2 hours apart from cefdinir
Dose adjustment needed for significant kidney impairment (CrCl <30 mL/min)
Iron-containing products may cause harmless reddish stools
Complete the full course even if you feel better

Tell your prescriber about all medications, supplements, and health conditions before starting cefdinir 300mg.