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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Brand Name
Clindamycin Hydrochloride
Generic Name
Clindamycin Hydrochloride
Active Ingredient
ClindamycinCategory
Retinoid [EPC]
Salt Form
Phosphate
Variants
85
Different strengths and dosage forms
| Strength | Form | Route | NDC |
|---|---|---|---|
| 75 mg/1 | CAPSULE | ORAL | 62135-764 |
| 150 mg/1 | CAPSULE | ORAL | 68071-5189 |
| 150 mg/1 | CAPSULE | ORAL | 68071-4335 |
References used for this content
This page is for informational purposes only and does not replace medical advice. Before using any prescription or over-the-counter medication for Clindamycin Hydrochloride, you must consult a qualified healthcare professional.
| 300 mg/1 | CAPSULE | ORAL | 71335-0320 |
| 150 mg/1 | CAPSULE | ORAL | 71335-2623 |
| 300 mg/1 | CAPSULE | ORAL | 50268-185 |
| 150 mg/1 | CAPSULE | ORAL | 60760-828 |
| 300 mg/1 | CAPSULE | ORAL | 65862-186 |
| 300 mg/1 | CAPSULE | ORAL | 68071-3577 |
| 300 mg/1 | CAPSULE | ORAL | 68071-5174 |
| 300 mg/1 | CAPSULE | ORAL | 71335-1412 |
| 300 mg/1 | CAPSULE | ORAL | 71335-2677 |
+ 38 more variants
Detailed information about Clindamycin Hydrochloride
Clindamycin is a potent lincosamide antibiotic used to treat serious bacterial infections. It is available in oral, injectable, and topical forms, working by inhibiting bacterial protein synthesis.
Dosage for clindamycin varies significantly based on the site and severity of the infection. For oral administration in adults:
For parenteral (IV or IM) administration in adults:
For topical treatment of acne, the 1% gel or solution is typically applied as a thin film to the affected area twice daily.
Clindamycin is approved for use in pediatric patients. Dosing is calculated based on body weight:
In patients with mild to moderate renal disease, dosage adjustments are generally not required. However, in cases of severe renal impairment, healthcare providers may monitor serum clindamycin levels or adjust the dosing interval, although the drug is not significantly removed by hemodialysis or peritoneal dialysis.
Since clindamycin is primarily metabolized by the liver, patients with moderate to severe hepatic impairment may experience a prolonged half-life. Dosage reduction is not always mandatory but clinical monitoring of liver enzymes and drug effects is highly recommended.
Clinical studies have shown that the risk of developing Clostridioides difficile-associated diarrhea (CDAD) is higher in patients over the age of 60. While no specific dosage adjustment is required based solely on age, healthcare providers often exercise caution and monitor bowel frequency closely in geriatric populations.
To ensure maximum efficacy and safety, patients should follow these specific instructions:
If a dose is missed, it should be taken as soon as the patient remembers. However, if it is almost time for the next scheduled dose, the missed dose should be skipped. Patients should never double the dose to catch up, as this increases the risk of gastrointestinal toxicity.
While acute overdose of clindamycin is rare, signs may include severe nausea, vomiting, or diarrhea. In the event of an overdose, patients should seek emergency medical attention or contact a poison control center. Treatment is supportive, as clindamycin is not effectively removed by dialysis.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose or stop the medication without medical guidance, as this can compromise the success of your treatment.
The most frequently reported side effects of clindamycin involve the gastrointestinal system. These include:
Clindamycin is a powerful antibiotic that must be used with caution. It is not effective against viral infections like the common cold or flu. Misuse or overuse of antibiotics can lead to decreased effectiveness in the future. Patients must inform their healthcare provider of any history of gastrointestinal disease, particularly colitis, as clindamycin can exacerbate these conditions.
The FDA has issued a Black Box Warning for clindamycin due to its potential to cause severe, sometimes fatal, colitis (inflammation of the colon). This condition is caused by the overgrowth of Clostridioides difficile. Healthcare providers are advised to reserve clindamycin for serious infections and to monitor patients for diarrhea, which can occur during treatment or up to several weeks after the medication is stopped.
Clindamycin must NEVER be used in the following circumstances:
Conditions requiring a careful risk-benefit analysis by a healthcare professional include:
Clindamycin is categorized as Pregnancy Category B. This means that animal reproduction studies have failed to demonstrate a risk to the fetus, and there are no adequate and well-controlled studies in pregnant women. However, clindamycin does cross the placenta. It is generally considered safe for use during the second and third trimesters, particularly for the treatment of bacterial vaginosis, which can be a risk factor for preterm birth. Use during the first trimester should only occur if clearly needed and prescribed by a physician.
Clindamycin has been reported to appear in human breast milk in ranges from 0.7 to 3.8 mcg/mL. While it is generally considered compatible with breastfeeding by the American Academy of Pediatrics, there is a risk of the infant developing diarrhea, diaper rash, or thrush due to the drug's effect on the infant's gut flora. In rare cases, blood in the stool of the nursing infant has been reported. Mothers should monitor their infants closely and consult a pediatrician.
Clindamycin is FDA-approved for use in pediatric patients, including neonates. In infants, it is important to monitor organ system functions, especially liver and kidney function, as their metabolic pathways are still developing. The injectable form contains benzyl alcohol as a preservative, which has been associated with 'gasping syndrome' in premature infants; therefore, benzyl alcohol-free formulations should be used in this population when possible.
Clindamycin is a lincosamide antibiotic that inhibits bacterial protein synthesis. It binds to the 23S RNA of the 50S subunit of the bacterial ribosome. This binding site overlaps with those of macrolides (like erythromycin) and streptogramins. By binding here, clindamycin inhibits the peptidyl transferase reaction and prevents the translocation of the peptide chain from the A-site to the P-site. This effectively stops the bacteria from building essential proteins, leading to cell growth arrest or cell death.
The efficacy of clindamycin is primarily related to the time the serum concentration remains above the Minimum Inhibitory Concentration (MIC) for the infecting organism (T > MIC). It exhibits a post-antibiotic effect (PAE), meaning it continues to suppress bacterial growth even after levels drop below the MIC. Resistance to clindamycin most commonly occurs through methylation of the ribosomal binding site, often mediated by erm genes, which can also confer resistance to macrolides (MLSB resistance).
| Parameter | Value |
Common questions about Clindamycin Hydrochloride
Clindamycin is a versatile antibiotic used to treat a wide range of serious bacterial infections caused by susceptible organisms. It is frequently prescribed for skin and soft tissue infections, bone and joint infections, and certain types of pneumonia. In dermatology, it is a primary treatment for acne when used topically. It is also highly effective against anaerobic bacteria, making it useful for intra-abdominal and pelvic infections. Additionally, it is often used as an alternative for patients who are allergic to penicillin.
The most common side effects of clindamycin involve the digestive system, including nausea, vomiting, stomach pain, and diarrhea. Some patients may also experience a metallic taste in their mouth, particularly during intravenous treatment. Skin rashes and hives are also relatively common allergic reactions. While many of these symptoms are mild, they should be monitored closely. If diarrhea becomes severe or bloody, it is essential to contact a healthcare provider immediately as this could indicate a serious colon infection.
There is no known direct chemical interaction between clindamycin and alcohol that causes a dangerous reaction like the 'disulfiram-like' effect seen with other antibiotics. However, drinking alcohol while fighting an infection can dehydrate the body and weaken the immune system. Alcohol can also irritate the stomach lining, which may worsen the gastrointestinal side effects of clindamycin. Most healthcare providers recommend avoiding or significantly limiting alcohol until you have finished your course of antibiotics and feel fully recovered.
Clindamycin is generally considered safe for use during pregnancy when clearly needed and is classified as Category B. Extensive clinical use has not shown a link between clindamycin and birth defects, especially when used during the second and third trimesters. It is often used to treat bacterial vaginosis in pregnant women to prevent complications. However, as with any medication, it should only be used under the strict supervision of a doctor. Your healthcare provider will weigh the benefits of treating the infection against any potential risks to the developing fetus.
The time it takes for clindamycin to work depends on the type and severity of the infection being treated. For most acute infections, patients may begin to feel better within 24 to 48 hours as the bacterial load decreases. For topical acne treatment, it may take several weeks of consistent use before a visible improvement in the skin is noticed. Even if symptoms disappear quickly, it is crucial to complete the entire prescribed course to ensure the infection is fully eradicated. If you do not feel any improvement after three days of oral therapy, contact your doctor.
You should not stop taking clindamycin suddenly unless you experience a severe allergic reaction or your doctor instructs you to do so. Stopping an antibiotic early can allow the remaining bacteria to multiply and cause the infection to return. Furthermore, this practice contributes to antibiotic resistance, making future infections much harder to treat. If you are bothered by side effects, talk to your healthcare provider about ways to manage them. Always finish the full duration of the prescription to ensure the best clinical outcome.
If you miss a dose of clindamycin, take it as soon as you remember. If it is almost time for your next scheduled dose, skip the missed dose and continue with your regular dosing schedule. Do not take two doses at once to make up for the one you missed, as this increases the risk of stomach irritation and other side effects. To help prevent missed doses, try taking your medication at the same time every day. Setting an alarm on your phone can also be a helpful reminder for maintaining a consistent schedule.
Weight gain is not a recognized side effect of clindamycin. Most side effects associated with this medication are gastrointestinal and are more likely to cause a temporary loss of appetite or weight loss if nausea and diarrhea are severe. If you notice rapid or unusual weight gain while taking this medication, it is likely due to another factor or a different underlying medical condition. You should discuss any unexpected weight changes with your healthcare provider. They can help determine the cause and ensure it is not related to fluid retention or other health issues.
Clindamycin can interact with several other medications, so it is vital to disclose your full medication list to your doctor. It can interfere with the effectiveness of the oral typhoid vaccine and may interact with erythromycin. It also has neuromuscular blocking properties that can increase the effect of drugs used during surgery. Some medications that affect liver enzymes, like rifampin, can change how clindamycin is processed by your body. Always check with a pharmacist before starting any new over-the-counter supplements or herbal products while on clindamycin.
Yes, clindamycin is widely available as a generic medication in all its forms, including capsules, injections, and topical preparations. The generic versions are bioequivalent to the brand-name versions (such as Cleocin) and are generally much more cost-effective. Generic clindamycin must meet the same rigorous FDA standards for quality, strength, and purity as the brand-name drug. Availability as a generic makes this important antibiotic accessible for a wide range of patients. You can discuss the generic options with your pharmacist to find the most affordable version for your prescription.
Other drugs with the same active ingredient (Clindamycin)
> Warning: Stop taking Clindamycin and call your doctor immediately if you experience any of these serious symptoms.
Prolonged use of clindamycin can lead to an overgrowth of non-susceptible organisms, particularly fungi. This may manifest as oral thrush or vaginal yeast infections. Additionally, the disruption of the normal intestinal flora can have lasting effects on gut health, requiring a significant period for the microbiome to recover after therapy is discontinued.
Clindamycin carries a prominent FDA Black Box Warning regarding Clostridioides difficile-associated diarrhea (CDAD). The warning states:
Report any unusual symptoms, especially changes in bowel habits or skin rashes, to your healthcare provider immediately. Early intervention is key to managing serious adverse reactions.
For patients on prolonged therapy (exceeding 10 days), healthcare providers typically order the following tests:
Clindamycin generally does not interfere with the ability to drive or operate machinery. However, if a patient experiences rare side effects like dizziness or significant fatigue, they should avoid these activities until they know how the medication affects them.
There is no direct contraindication between alcohol and clindamycin (unlike metronidazole). However, alcohol can irritate the gastrointestinal tract and may worsen the stomach-related side effects of the antibiotic. It is generally advisable to limit alcohol consumption while the body is fighting an infection.
There is no specific 'withdrawal' syndrome associated with clindamycin. However, stopping the drug prematurely is dangerous because it allows the surviving bacteria to multiply, potentially leading to a relapse of the infection that is more difficult to treat and resistant to the drug.
> Important: Discuss all your medical conditions, especially any history of asthma, liver disease, or intestinal problems, with your healthcare provider before starting Clindamycin.
Clindamycin absorption is not significantly affected by food. It can be taken with meals to reduce stomach upset. There are no known interactions with grapefruit juice or dairy products.
Clindamycin does not typically interfere with common laboratory tests. However, it may cause transient elevations in liver transaminases (AST, ALT) which could be misinterpreted as primary liver disease.
For each major interaction, the mechanism usually involves either competitive binding at the ribosomal level or modulation of the CYP450 enzymatic pathway. The management strategy involves either avoiding the combination, adjusting the timing of administration, or increased clinical monitoring for efficacy and safety.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, including over-the-counter drugs.
There is a known cross-sensitivity between clindamycin and lincomycin. Patients allergic to one lincosamide are highly likely to be allergic to the other. There is generally no cross-reactivity between clindamycin and penicillins or cephalosporins, making it a common alternative for patients with those specific allergies.
> Important: Your healthcare provider will evaluate your complete medical history, including any past reactions to antibiotics, before prescribing Clindamycin. Always disclose your full history of digestive issues.
Clinical experience has shown that elderly patients (over 65) are more likely to experience severe diarrhea and pseudomembranous colitis. This population should be monitored frequently for changes in bowel frequency. No specific dosage adjustment is required based on age alone, but the higher prevalence of decreased hepatic or renal function in the elderly warrants cautious dose selection.
In patients with renal failure, the half-life of clindamycin is only slightly prolonged. Dosage adjustment is usually not necessary unless the impairment is extreme. However, serum levels should be monitored in patients with severe renal insufficiency to avoid potential accumulation.
In patients with moderate to severe liver disease, the half-life of clindamycin is significantly prolonged. While specific dosing guidelines for Child-Pugh classifications are not established, healthcare providers may choose to reduce the dose or extend the dosing interval to prevent toxicity.
> Important: Special populations require individualized medical assessment. Always inform your doctor if you are pregnant, planning to become pregnant, or nursing.
| Bioavailability | ~90% (Oral) |
| Protein Binding | 92% - 94% |
| Half-life | 2.4 - 3.0 hours |
| Tmax | 45 - 60 minutes |
| Metabolism | Hepatic (CYP3A4) |
| Excretion | Renal (10%), Fecal (3.6% as active drug) |
Clindamycin is the primary representative of the Lincosamide class. It is therapeutically related to lincomycin but offers superior absorption and a broader spectrum of activity. It is often grouped with macrolides and tetracyclines as protein synthesis inhibitors, though its specific binding site is distinct.