What Is Clindamycin?

Clindamycin is a lincosamide antibiotic used to treat a wide range of serious bacterial infections. Originally developed as a derivative of lincomycin, it has been a staple in medicine since its FDA approval.

Clindamycin is prescribed for serious respiratory tract infections, skin and soft tissue infections, septicemia, intra-abdominal infections, bone and joint infections, and gynecological infections. The topical formulations are widely used for acne vulgaris, while vaginal formulations treat bacterial vaginosis.

It is also used off-label for dental infections, MRSA skin infections, malaria (in combination with quinine), toxoplasmosis, and bacterial endocarditis prophylaxis in penicillin-allergic patients.

Clindamycin is available as a generic and under brand names including Cleocin, Cleocin T, ClindaMax, Clindesse, Evoclin, and Dalacin.

How Does Clindamycin Work?

Clindamycin works by binding to the 50S ribosomal subunit of susceptible bacteria. This binding interferes with the transpeptidation reaction, effectively inhibiting bacterial protein synthesis. Without the ability to produce essential proteins, bacteria cannot grow and reproduce.

Clindamycin is primarily bacteriostatic (stops bacterial growth) but can be bactericidal (kills bacteria) at higher concentrations or against highly susceptible organisms.

It is effective against many gram-positive aerobes (like Staphylococcus and Streptococcus species) and a broad range of anaerobic bacteria, making it particularly valuable for mixed infections and abscesses.

What Doses Are Available for Clindamycin?

Clindamycin comes in a wide variety of formulations and strengths:

Oral

• Capsules: 75 mg, 150 mg, 300 mg (Clindamycin HCl)
• Oral Solution: 75 mg/5 mL (Clindamycin Palmitate HCl — Cleocin Pediatric)

Injectable

• Injectable solution: 150 mg/mL vials (Clindamycin Phosphate)
• Premixed IV bags

Topical (for Acne)

• Gel: 1% (Cleocin T, ClindaMax)
• Lotion: 1%
• Solution: 1%
• Foam: 1% (Evoclin)

Vaginal

• Vaginal cream: 2% (Cleocin, Clindesse)
• Vaginal suppositories: 100 mg

Your doctor will choose the right form and dose based on the type and severity of your infection.

How Hard Is It to Find Clindamycin in Stock?

Clindamycin scores a 6 out of 100 on our findability scale, meaning it can be very difficult to locate depending on the formulation you need. The injectable form (Clindamycin Phosphate for IV/IM use) has been in an active shortage tracked by the ASHP, with recurring supply disruptions since 2010 that intensified from 2023 through 2025. Multiple manufacturers have been on back order simultaneously.

The oral capsule form is generally available at most pharmacies, though intermittent spot shortages can occur. Topical and vaginal formulations are typically in stock but may require ordering at smaller pharmacies.

If you're struggling to find Clindamycin in stock, Medfinder can help you locate pharmacies near you that have it available right now.

Who Can Prescribe Clindamycin?

Clindamycin is one of the most widely prescribed antibiotics across medical specialties. Doctors who commonly prescribe it include:

• Primary Care Physicians (PCPs) — for common skin infections, respiratory infections, and dental prophylaxis
• Internists — for serious systemic infections in adults
• Dermatologists — for acne vulgaris (topical formulations) and skin infections
• Dentists — for dental infections and as prophylaxis for patients allergic to penicillin
• OB/GYNs — for bacterial vaginosis and gynecological infections
• Infectious Disease Specialists — for complex or resistant infections, toxoplasmosis, and malaria
• Surgeons — for surgical site infections and prophylaxis
• Emergency Medicine Physicians — for acute infections including abscesses and skin infections
• Pediatricians — for pediatric infections using age-appropriate formulations

Clindamycin is also commonly available through telehealth providers for appropriate infections like acne and uncomplicated skin infections.

Is Clindamycin a Controlled Substance?

No. Clindamycin is not a controlled substance and has no DEA scheduling. It is an antibiotic with no potential for abuse or dependence. It can be prescribed by any licensed healthcare provider and does not require special prescribing authority, triplicate prescriptions, or refill limitations beyond standard prescription rules.

Common Side Effects of Clindamycin

Like all antibiotics, Clindamycin can cause side effects. Most are mild and resolve after completing your course of treatment:

• Diarrhea — the most common side effect, affecting up to 20% of patients
• Nausea
• Vomiting
• Abdominal pain
• Rash
• Metallic taste

Serious Side Effects (Seek Medical Attention)

• C. difficile-associated diarrhea (CDAD) — Clindamycin carries an FDA Boxed Warning for this serious and potentially life-threatening complication. If you develop severe, watery, or bloody diarrhea, contact your doctor immediately.
• Stevens-Johnson Syndrome (SJS) — a rare but serious skin reaction
• DRESS syndrome — drug reaction with eosinophilia and systemic symptoms
• Anaphylaxis — severe allergic reaction
• Hepatotoxicity — liver damage
• Agranulocytosis — dangerously low white blood cell count

Because of the C. diff risk, Clindamycin should be reserved for infections where less toxic antibiotics are not appropriate.

Alternative Medications to Clindamycin

If Clindamycin is unavailable, too expensive, or not suitable for you, your doctor may consider these alternatives:

• Azithromycin — a macrolide antibiotic with convenient once-daily dosing; commonly used for respiratory and skin infections
• Doxycycline — a tetracycline antibiotic with broad-spectrum coverage including MRSA; taken twice daily
• Metronidazole — excellent anaerobic coverage; frequently used for intra-abdominal and gynecological infections as well as bacterial vaginosis
• Erythromycin — a macrolide with similar gram-positive coverage, though it should not be used together with Clindamycin due to antagonism

Always consult your doctor before switching medications. The right alternative depends on your specific infection, allergies, and medical history.

Drug Interactions with Clindamycin

Clindamycin can interact with several medications. Tell your doctor about everything you take, including:

Major Interactions

• Erythromycin — these two antibiotics are antagonistic and should never be used together. They compete for the same ribosomal binding site, reducing each other's effectiveness.
• Neuromuscular blocking agents (e.g., succinylcholine, tubocurarine) — Clindamycin can enhance neuromuscular blockade, which is important during and after surgery
• CYP3A4 inducers (e.g., rifampin, carbamazepine) — may decrease Clindamycin blood levels, reducing effectiveness
• CYP3A4 inhibitors (e.g., ketoconazole, ritonavir) — may increase Clindamycin blood levels, raising the risk of side effects

Moderate Interactions

• Warfarin — Clindamycin may increase the anticoagulant effect; monitor INR closely
• Kaolin-pectin antidiarrheals — may reduce Clindamycin absorption if taken at the same time
• Live vaccines — antibiotics may reduce the effectiveness of live vaccines

No significant food interactions have been reported with Clindamycin.

Final Thoughts on Clindamycin

Clindamycin remains one of the most versatile and widely prescribed antibiotics in the United States, with formulations covering everything from acne to life-threatening sepsis. While the oral and topical forms are generally accessible and affordable — as low as $9–$30 with a discount card — the injectable form has been in a persistent shortage since 2010, earning this medication a low findability score of 6.

If you need Clindamycin and are having trouble finding it in stock, Medfinder can help you search pharmacies near you in real time. For cost savings, check discount programs like GoodRx and SingleCare, which can bring the price of generic oral capsules down from over $100 to under $30.

Always complete your full course of antibiotics and contact your doctor immediately if you develop severe diarrhea, as this could be a sign of C. difficile infection — a serious risk associated with Clindamycin use.