Can't Find Cefprozil? You Have Options

Getting told your antibiotic is out of stock when you're already dealing with an infection is stressful. If your pharmacy can't fill your Cefprozil prescription, the good news is that there are several effective alternatives your doctor can switch you to — often the same day.

In this guide, we'll explain what Cefprozil is, how it works, and walk through the most common alternatives so you can have an informed conversation with your doctor.

What Is Cefprozil?

Cefprozil (formerly sold under the brand name Cefzil) is a second-generation cephalosporin antibiotic. It's prescribed for bacterial infections including:

• Ear infections (otitis media)
• Sinus infections
• Strep throat and tonsillitis
• Bronchitis
• Skin infections

It's available as 250 mg and 500 mg tablets and as an oral suspension (liquid) for children. A typical course is 250–500 mg every 12 hours for 10 days.

How Does Cefprozil Work?

Cefprozil belongs to the beta-lactam family of antibiotics. It kills bacteria by interfering with their ability to build cell walls. Specifically, it binds to proteins called penicillin-binding proteins (PBPs) that bacteria need to construct and maintain their cell walls. Without intact cell walls, bacteria can't survive.

This mechanism is shared by all cephalosporins and penicillins, which is why alternatives in these drug classes can often be substituted for Cefprozil.

Alternative 1: Cefuroxime (Ceftin)

Cefuroxime is the closest alternative to Cefprozil. It's also a second-generation cephalosporin, which means it covers nearly the same spectrum of bacteria.

• Treats: Sinusitis, otitis media, bronchitis, pharyngitis, urinary tract infections, skin infections
• Dosage: 250–500 mg twice daily for 10 days (adults)
• Forms: Tablets and oral suspension
• Cash price: Approximately $15–$40 for a generic course

Cefuroxime is widely available and is often the first substitute doctors reach for when Cefprozil is out of stock. One difference: Cefuroxime tablets should be taken with food for better absorption, while Cefprozil can be taken with or without food.

Alternative 2: Amoxicillin/Clavulanate (Augmentin)

Amoxicillin/Clavulanate combines a penicillin-type antibiotic with a beta-lactamase inhibitor, giving it broader coverage against resistant bacteria.

• Treats: Sinusitis, otitis media, bronchitis, skin infections, urinary tract infections
• Dosage: 500/125 mg or 875/125 mg twice daily for 7–10 days (adults)
• Forms: Tablets, chewable tablets, oral suspension
• Cash price: Approximately $15–$35 for generic

Augmentin is one of the most commonly prescribed antibiotics in the world and is generally easy to find. It covers many of the same infections as Cefprozil, plus some additional resistant organisms. The main downside is a higher rate of GI side effects, especially diarrhea.

Alternative 3: Cephalexin (Keflex)

Cephalexin is a first-generation cephalosporin. While it has a slightly narrower spectrum than Cefprozil, it's effective for many of the same conditions.

• Treats: Skin infections, strep throat, otitis media, urinary tract infections
• Dosage: 250–500 mg every 6 hours for 7–10 days (adults)
• Forms: Capsules and oral suspension
• Cash price: Approximately $10–$25 for generic

Cephalexin is one of the cheapest and most widely available antibiotics. The trade-off is that it's taken four times daily instead of twice, and it doesn't cover Haemophilus influenzae as well as Cefprozil does, so it may not be ideal for all sinus or ear infections.

Alternative 4: Azithromycin (Zithromax, Z-Pack)

Azithromycin is a macrolide antibiotic — a completely different drug class from cephalosporins. It's an important option for patients who are allergic to penicillin or cephalosporins.

• Treats: Sinusitis, bronchitis, pharyngitis, skin infections, pneumonia
• Dosage: Typically 500 mg on day 1, then 250 mg daily for 4 more days (the "Z-Pack")
• Forms: Tablets, oral suspension, IV (hospital)
• Cash price: Approximately $10–$25 for generic

The big advantage of Azithromycin is the short course (5 days vs. 10) and once-daily dosing. However, bacterial resistance to macrolides has been increasing, so it may not work for all infections. Your doctor will consider local resistance patterns when deciding.

How to Talk to Your Doctor About Switching

If you can't find Cefprozil, here's what to tell your doctor:

1. Explain the situation: "My pharmacy is out of Cefprozil and can't get it. Can we switch to something else?"
2. Ask about allergies: If you have a penicillin allergy, make sure your doctor knows — this affects which alternatives are safe.
3. Mention cost: If you're paying cash, ask which alternative is most affordable. Cephalexin and Azithromycin are usually the cheapest.
4. Don't wait: Delaying antibiotic treatment can allow your infection to worsen. Call your doctor as soon as you know Cefprozil isn't available.

Final Thoughts

Not being able to find your prescribed antibiotic is frustrating, but you don't have to suffer through your infection. Cefuroxime, Augmentin, Cephalexin, and Azithromycin are all proven alternatives that your doctor can prescribe quickly.

Before switching, try checking Medfinder to see if another pharmacy near you has Cefprozil in stock. Read our full guide: How to find Cefprozil in stock near you.

And for the latest on supply, see our Cefprozil shortage update for 2026.