
Antibiotic Decision Aid
Choose Your Scenario
Antibiotic Recommendation
How to Use This Tool
This tool helps you understand which antibiotics might be appropriate based on common clinical scenarios. It's not a substitute for professional medical advice. Always consult with your healthcare provider before making treatment decisions.
When you’re dealing with a bacterial skin infection, picking the right oral antibiotic can feel like a gamble. Cleocin (Clindamycin) is a lincosamide antibiotic that’s often prescribed for acne, cellulitis, and certain respiratory infections. It works by stopping bacteria from making proteins they need to grow. But is it always the best bet? Let’s break down how Cleocin stacks up against the most common alternatives so you can make an informed call.
How Cleocin Works and Who It’s For
Cleocin belongs to the lincosamide family. Its main action is binding to the 50S subunit of bacterial ribosomes, which blocks protein synthesis. Because of this mechanism, it’s especially good against anaerobic bacteria like Staphylococcus aureus (including many methicillin‑resistant strains) and Streptococcus pyogenes. Typical uses in the UK include:
- Moderate to severe acne that hasn’t responded to topical therapy
- Cellulitis or skin abscesses caused by Gram‑positive organisms
- Bone and joint infections where anaerobes are suspected
It’s taken twice daily, usually for 7‑10 days, and comes in 150 mg tablets.
Why Some Doctors Look for Alternatives
Even though Cleocin is powerful, it isn’t free from drawbacks. The most common side effect is a nasty diarrhoea that can turn into Clostridioides difficile infection in a small percentage of patients. It also interacts with CYP3A4‑metabolised drugs, which can be a concern for people on certain statins or anti‑epileptics. Those risks push clinicians to consider other oral antibiotics when the infection profile allows.
Head‑to‑Head Comparison Table
Attribute | Cleocin (Clindamycin) | Amoxicillin | Doxycycline | Minocycline | Erythromycin |
---|---|---|---|---|---|
Drug class | Lincosamide | Penicillin | Tetracycline | Tetracycline | Macrolide |
Typical dose | 150 mg PO BID | 500 mg PO TID | 100 mg PO BID | 100 mg PO BID | 250 mg PO QID |
Key spectrum | Gram‑positive, anaerobes | Gram‑positive, some Gram‑negative | Broad (Gram‑+, Gram‑‑) | Broad, good for acne | Gram‑positive, some atypicals |
Common side effects | Diarrhoea, C. difficile | Rash, GI upset | Photosensitivity, GI upset | Vertigo, hyperpigmentation | GI upset, liver enzymes |
Pregnancy safety | Category B2 (UK) | Category B1 | Category D (risk) | Category D | Category B1 |
Resistance concerns | High MRSA rates | β‑lactamase producers | Efflux pumps | Efflux pumps | Macrolide‑lincosamide‑streptogramin B (MLSB) resistance |
This table shows that no single drug dominates-it’s all about matching the bug, the patient’s health status, and the side‑effect profile you can tolerate.

When to Choose Cleocin Over the Rest
If the culture points to an anaerobic Gram‑positive infection, especially when MRSA is on the radar, Cleocin often wins because its penetration into skin and bone tissue is excellent. It’s also a solid fallback when a patient is allergic to penicillins (so amoxicillin is off the table) and can’t take tetracyclines due to pregnancy or severe photosensitivity.
Another niche is acne that’s resistant to both doxycycline and minocycline. A short‑course of Cleocin can give a rapid reduction in inflammatory lesions, though dermatologists usually reserve it for short bursts to avoid gut complications.
Scenarios Favoring an Alternative
On the flip side, if the infection is mild and caused by a β‑lactam‑sensitive organism (think uncomplicated streptococcal throat or a small cellulitis), amoxicillin is cheaper, better tolerated, and carries fewer gastrointestinal risks. For patients who need a long‑term acne regimen, tetracyclines such as doxycycline or minocycline are preferred because they’re easier on the gut and have anti‑inflammatory benefits beyond pure antibacterial action.
Erythromycin can be a good choice for pregnant women who can’t take doxycycline and need a macrolide for atypical coverage, though its GI upset rate is higher than Clindamycin’s.
Cost and Accessibility in the UK
Cleocin is a brand‑named drug, and the generic clindamycin capsules are a bit cheaper, but both sit higher on the NHS formulary price list than amoxicillin or doxycycline. A typical 10‑day course costs around £12‑£15, while a 7‑day amoxicillin course is often under £5. Insurance coverage is generally good for all these antibiotics, but the pharmacy may ask for a prescriber’s justification for the pricier options.

Practical Tips for Patients on Cleocin
- Take the tablets with a full glass of water; food helps reduce stomach upset.
- Complete the full course even if you feel better after a few days - stopping early fuels resistance.
- Watch for watery stools that turn mushy or contain blood - call your doctor immediately.
- If you’re on a statin, ask your GP whether dose adjustments are needed.
- Store tablets at room temperature, away from moisture.
Following these steps can keep the infection under control while lowering the odds of a nasty gut complication.
Bottom Line Decision Tree
Use this quick flowchart when you or a clinician are deciding whether Cleocin is the right call.
- Is the bug confirmed or strongly suspected to be anaerobic Gram‑positive? → Yes: consider Cleocin.
- Is the patient pregnant or breastfeeding? → Yes: avoid tetracyclines; consider Cleocin if no C. difficile risk.
- Any history of C. difficile infection? → Yes: steer clear of Cleocin; pick amoxicillin or a macrolide.
- Is cost a major concern? → Yes: amoxicillin or doxycycline are cheaper alternatives.
- Allergy to penicillins? → Yes: Cleocin or a macrolide become front‑line options.
This tree isn’t a substitute for a lab report, but it can guide initial prescribing decisions.
Frequently Asked Questions
Can I take Cleocin if I’m allergic to penicillin?
Yes. Clindamycin (Cleocin) is chemically unrelated to penicillins, so it’s a safe alternative for most penicillin‑allergic patients. Always confirm the allergy type with your doctor.
How long does it take for Cleocin to clear acne?
Most dermatologists see noticeable improvement within 2‑3 weeks of a full course. However, because of the risk of C. difficile, it’s usually limited to a 7‑10‑day burst.
Is there a generic version of Cleocin?
Yes. In the UK you’ll find generic clindamycin capsules, which contain the same active ingredient and are priced lower than the branded Cleocin.
What should I do if I develop diarrhoea while on Cleocin?
Contact your GP right away. Persistent watery diarrhoea can signal C. difficile infection, which may require stopping the antibiotic and starting a specific treatment.
Can I combine Cleocin with other antibiotics?
Combination therapy is sometimes used for mixed infections, but it must be prescribed by a clinician. Mixing drugs without guidance can increase resistance and side‑effects.
Hopefully this clears up most of the confusion around when Cleocin shines and when another option might be smarter. Always discuss with your healthcare provider before swapping antibiotics.
Margaret pope
October 18, 2025 AT 15:55If you’re weighing Cleocin against the cheaper options remember it shines when you need strong anaerobic coverage and the patient can’t take penicillins. The gut side‑effects are real so a probiotic plan can help reduce the risk. Talk with your clinician about your history of C. difficile and any current statin meds before starting. A short supervised course often gives the best balance of efficacy and safety.