When Cefepime Isn't Available, What Are Your Options?

If your doctor prescribed Cefepime and your hospital or pharmacy can't get it, you're not alone. Cefepime has been on the ASHP drug shortage list since 2022, and supply remains inconsistent in 2026.

The good news: there are effective alternatives. The right choice depends on the type of infection you have, the bacteria causing it, and your overall health. This article will help you understand your options so you can have an informed conversation with your doctor.

What Is Cefepime and How Does It Work?

Cefepime (brand name Maxipime) is a fourth-generation cephalosporin antibiotic. It works by inhibiting bacterial cell wall synthesis — essentially destroying the structural integrity of bacteria so they can't survive.

What makes Cefepime special is its broad spectrum of activity. It's effective against both gram-positive and gram-negative bacteria, including tough organisms like Pseudomonas aeruginosa and AmpC beta-lactamase producers. It's also more resistant to breakdown by bacterial enzymes than older cephalosporins.

Cefepime is given intravenously (IV) or intramuscularly (IM) and is used for serious infections like pneumonia, complicated UTIs, intra-abdominal infections, skin infections, and febrile neutropenia in cancer patients. For a deeper dive, read our article on how Cefepime works.

Alternative #1: Ceftazidime

Ceftazidime is a third-generation cephalosporin and one of the closest alternatives to Cefepime. Like Cefepime, it has strong activity against Pseudomonas aeruginosa and is administered intravenously.

Key facts:

• Given IV or IM, typically 1-2 g every 8 hours
• FDA-approved for pneumonia, UTIs, intra-abdominal infections, and more
• Also used for empiric therapy in febrile neutropenia
• Less stable against some beta-lactamases compared to Cefepime
• Also available as Ceftazidime/Avibactam (Avycaz), which adds a beta-lactamase inhibitor for coverage against resistant organisms

When it's a good fit: When the infection is known or suspected to involve Pseudomonas and the bacteria is susceptible to Ceftazidime. It's one of the most direct substitutes for Cefepime in many clinical scenarios.

Alternative #2: Piperacillin/Tazobactam (Zosyn)

Piperacillin/Tazobactam, commonly known by its brand name Zosyn, is an extended-spectrum penicillin combined with a beta-lactamase inhibitor. It's one of the most widely used IV antibiotics in U.S. hospitals.

Key facts:

• Given IV, typically 3.375 g to 4.5 g every 6-8 hours
• Broad spectrum covering gram-negative bacteria (including Pseudomonas), gram-positive bacteria, and anaerobes
• Commonly used for intra-abdominal infections, pneumonia, and skin infections
• The beta-lactamase inhibitor (Tazobactam) provides coverage against many resistant organisms

When it's a good fit: When broad-spectrum coverage is needed, especially for mixed infections involving anaerobes (like complicated intra-abdominal infections). Zosyn is often the first alternative hospitals turn to when Cefepime is unavailable.

Alternative #3: Meropenem

Meropenem is a carbapenem antibiotic — the broadest-spectrum class of beta-lactam antibiotics available. It's considered a "big gun" in infectious disease and is typically reserved for serious or resistant infections.

Key facts:

• Given IV, typically 1-2 g every 8 hours
• Active against an extremely wide range of bacteria, including many that are resistant to cephalosporins
• FDA-approved for complicated skin infections, intra-abdominal infections, and bacterial meningitis
• Generally well-tolerated; lower seizure risk compared to Imipenem (another carbapenem)

When it's a good fit: When the infection is caused by resistant bacteria, when other alternatives have failed, or when the patient is critically ill. Doctors are often cautious about using carbapenems to preserve their effectiveness against resistant organisms.

Alternative #4: Ceftazidime/Avibactam (Avycaz)

Avycaz combines Ceftazidime with Avibactam, a novel beta-lactamase inhibitor. This combination is effective against many extended-spectrum beta-lactamase (ESBL) and AmpC-producing bacteria that standard cephalosporins can't handle.

Key facts:

• Given IV, typically 2.5 g every 8 hours
• FDA-approved for complicated intra-abdominal infections (with Metronidazole) and complicated UTIs
• Effective against some carbapenem-resistant Enterobacterales
• Significantly more expensive than standard Cefepime or Ceftazidime

When it's a good fit: When the infection involves ESBL or AmpC-producing organisms, or when standard cephalosporins are not expected to be effective based on culture and sensitivity data.

How Your Doctor Chooses the Right Alternative

Your doctor won't just pick a random substitute. The decision depends on several factors:

• Culture and sensitivity results: Lab tests that show which bacteria is causing the infection and which antibiotics it's susceptible to
• Type and location of infection: Different antibiotics penetrate different tissues better
• Your kidney function: All of these antibiotics require dose adjustments for renal impairment
• Allergy history: If you're allergic to penicillins or cephalosporins, some alternatives may also be off-limits (though cross-reactivity is low at 1-2%)
• Antibiotic stewardship: Hospitals try to use the narrowest effective antibiotic to slow resistance development

For more about Cefepime interactions and safety considerations, see our guide on Cefepime drug interactions.

What About Side Effects?

All antibiotics have potential side effects. The alternatives listed above share many of the same risks as Cefepime, including:

• Diarrhea (including Clostridioides difficile infection)
• Nausea and vomiting
• Allergic reactions
• Injection site reactions

Cefepime specifically carries a risk of neurotoxicity (seizures, confusion, altered mental status), particularly in patients with kidney problems. Some alternatives like Meropenem have a lower neurotoxicity risk, which may actually be an advantage for certain patients. Learn more about Cefepime side effects.

Final Thoughts

Not being able to get a prescribed medication is stressful, especially when you're dealing with a serious infection. But Cefepime is not the only option. Effective alternatives exist, and your healthcare team has the expertise to choose the right one for you.

Before switching medications, use Medfinder to check if Cefepime might still be available at another facility near you. And if you do need to switch, trust your doctor's guidance — they'll ensure you get the most effective treatment available.