Lincomycin?

Lincomycin is an antibiotic in the lincosamide class. It’s used for certain serious infections caused by susceptible bacteria, but it’s much less common today than clindamycin.

Key points

- Mechanism: Binds to the 50S ribosomal subunit and inhibits bacterial protein synthesis (bacteriostatic).

- Spectrum: Primarily active against Gram-positive cocci (some Streptococcus and Staphylococcus species) and many anaerobes. Limited activity against Gram-negative bacteria. Resistance can occur (MLS_B mechanism).

- How it’s given: Most commonly by injection (intramuscular or intravenous). There is an older oral form, but lincomycin is used less often today because clindamycin is usually preferred.

- Indications: Infections caused by susceptible organisms when penicillins or other first-choice antibiotics can’t be used. Historically used for skin/soft tissue, respiratory, and intra-abdominal infections, among others. Clinicians often choose clindamycin instead due to better tolerability and similar spectrum.

- Dosing (example, for adults): Typical regimens are around 600 mg every 8 hours by IM or IV, adjusted for severity and renal function. Doses and max daily amounts should follow the product labeling and clinician judgment.

- Safety and side effects: GI upset, diarrhea, rash, hypersensitivity reactions. A major concern is antibiotic-associated colitis, including C. difficile infection. Injection-site reactions can occur.

- Contraindications and cautions: Known hypersensitivity to lincomycin or other lincosamides. Use with caution in patients with a history of colitis or other severe GI disease. Avoid or monitor closely if there is suspected C. difficile colitis. Pregnancy and lactation: use only if clearly needed; consult a clinician.

- Interactions: May increase effects of neuromuscular blockers. Avoid co-administration with macrolides (e.g., erythromycin) in many infections due to potential antagonism or reduced efficacy.

- Comparison to clindamycin: Clindamycin is generally preferred today because of better tolerability and similar spectrum; lincomycin is used mainly when clindamycin cannot be used or is not available.

If you want, tell me what you’re specifically looking for (indication, dosing for a particular infection, safety in pregnancy, or comparisons to clindamycin), and I’ll tailor the details.