When You Can't Get Clindamycin, What Are Your Options?

Whether your pharmacy is out of stock, you've had a bad reaction, or the cost doesn't work for you — there are times when you need an alternative to Clindamycin. The good news is that several effective antibiotics can treat many of the same infections.

But here's the important part: never switch antibiotics on your own. Only your doctor can determine which alternative is right for your specific infection, medical history, and any allergies you may have. This article is designed to help you have an informed conversation with your prescriber.

What Is Clindamycin and How Does It Work?

Clindamycin is a lincosamide antibiotic that works by binding to the 50S ribosomal subunit of bacteria, blocking them from making the proteins they need to survive and multiply. This makes it effective against a broad range of bacteria, especially:

• Gram-positive bacteria like Staphylococcus aureus (including some MRSA strains) and Streptococcus species
• Anaerobic bacteria that thrive in low-oxygen environments, such as those found in abdominal, pelvic, and dental infections

Clindamycin is available as oral capsules (75 mg, 150 mg, 300 mg), an oral liquid solution, injectable formulations, topical gels and lotions for acne, and vaginal creams for bacterial vaginosis. Brand names include Cleocin, Cleocin T, Evoclin, and Clindagel.

For a complete overview, visit: What Is Clindamycin? Uses, Dosage, and What You Need to Know.

Why You Might Need an Alternative

There are several reasons your doctor might consider switching you to a different antibiotic:

• Pharmacy shortage — Clindamycin injectable forms have been on the ASHP shortage list, and oral forms may be out of stock locally
• Side effects — Clindamycin carries a boxed warning for Clostridioides difficile-associated diarrhea (C. diff), a potentially serious condition
• Allergy or sensitivity — If you've had a reaction to Clindamycin or Lincomycin
• Resistance — Lab testing may show that the bacteria causing your infection don't respond to Clindamycin
• Cost concerns — While generic Clindamycin is affordable, certain formulations (like topical gels) can be pricier

4 Alternatives to Clindamycin

The following antibiotics are commonly prescribed when Clindamycin isn't available or isn't the right fit. Each works differently and has its own pros and cons.

1. Azithromycin (Zithromax, Z-Pack)

Drug class: Macrolide antibiotic

How it works: Like Clindamycin, Azithromycin targets the 50S ribosomal subunit to block bacterial protein synthesis — but it binds to a different site, so they're not interchangeable in all situations.

Commonly used for:

• Respiratory infections (bronchitis, pneumonia, sinusitis)
• Skin infections
• Ear infections
• Strep throat
• Some sexually transmitted infections

Key advantages:

• Simple dosing — usually once daily for 3-5 days (the popular "Z-Pack")
• Lower risk of C. diff compared to Clindamycin
• Widely available and affordable (as low as $10-$20 with a discount card)

Things to know: Azithromycin has weaker anaerobic coverage than Clindamycin and may cause QT prolongation in patients with heart conditions. It's not ideal for dental infections or deep anaerobic infections.

2. Doxycycline

Drug class: Tetracycline antibiotic

How it works: Doxycycline blocks the 30S ribosomal subunit, preventing bacteria from building proteins through a different mechanism than Clindamycin.

Commonly used for:

• Skin and soft tissue infections (including MRSA)
• Acne
• Respiratory infections
• Tick-borne diseases (Lyme disease, Rocky Mountain spotted fever)
• Urinary tract infections

Key advantages:

• Excellent MRSA coverage for skin infections
• Very affordable — often $10-$30 with a discount card
• Once or twice daily dosing
• Good alternative for acne when topical Clindamycin isn't available

Things to know: Doxycycline causes sun sensitivity, should not be used in pregnant women or children under 8, and must be taken with plenty of water to avoid esophageal irritation. It has limited anaerobic coverage.

3. Metronidazole (Flagyl)

Drug class: Nitroimidazole antibiotic

How it works: Metronidazole enters bacterial cells and disrupts their DNA, killing anaerobic bacteria and certain parasites.

Commonly used for:

• Intra-abdominal infections
• Pelvic infections and bacterial vaginosis
• Dental infections and abscesses
• C. difficile infections (ironically, it treats the infection that Clindamycin can cause)
• H. pylori infection (with other medications)

Key advantages:

• Excellent anaerobic coverage — as good as or better than Clindamycin for many anaerobic infections
• Affordable — typically $10-$20 with a discount card
• Available in oral, IV, topical, and vaginal formulations

Things to know: You must avoid alcohol while taking Metronidazole and for at least 3 days after finishing treatment (causes severe nausea and vomiting). It may cause a metallic taste. It doesn't cover gram-positive aerobes like Staph or Strep.

4. Amoxicillin/Clavulanate (Augmentin)

Drug class: Penicillin/beta-lactamase inhibitor combination

How it works: Amoxicillin kills bacteria by disrupting their cell walls, while Clavulanate blocks the enzymes that some bacteria use to resist Amoxicillin.

Commonly used for:

• Skin infections
• Respiratory infections (sinusitis, bronchitis, pneumonia)
• Dental infections
• Ear infections
• Urinary tract infections

Key advantages:

• Broad-spectrum coverage including many anaerobes
• Well-studied and widely available
• Affordable — around $15-$30 with a discount card

Things to know: Do not use if you have a penicillin allergy. This is a critical distinction because many people take Clindamycin specifically because they're allergic to penicillin. Augmentin commonly causes diarrhea and stomach upset.

How to Talk to Your Doctor About Alternatives

When discussing a switch with your doctor, it helps to share:

• Why you need an alternative (shortage, side effects, cost, allergy)
• Your complete allergy history
• Any other medications you're taking — check our Clindamycin drug interactions guide for context
• Whether you've had C. diff before (this matters for antibiotic selection)

Final Thoughts

Clindamycin is a valuable antibiotic, but it's not the only option. If you can't find it or can't take it, your doctor has several effective alternatives to choose from. The right choice depends on your specific infection, your allergies, and your medical history.

If the issue is availability, try using Medfinder to locate a pharmacy that has Clindamycin in stock before switching medications. Sometimes the solution is as simple as checking a different pharmacy. Read our tips: How to Find Clindamycin in Stock Near You.