Clindamycin and Pipecuronium: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 1, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Clindamycin
Pipecuronium
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
These two medicines are almost always used together in a hospital, usually around surgery. Pipecuronium is a muscle relaxant that temporarily stops your muscles from moving so a breathing machine can help you during an operation. Clindamycin is an antibiotic that, on its own, can also relax muscles a little.
When they are given together, the muscle-relaxing effect can become stronger and last longer than expected, especially with higher antibiotic doses. This mostly matters for the muscles you breathe with. The good news: this happens in a monitored setting where your care team watches your muscle strength and breathing closely and can adjust doses or support your breathing until it wears off.
Effect: Clindamycin may enhance and prolong the neuromuscular blockade produced by pipecuronium, a nondepolarizing agent.
Mechanism: Additive neuromuscular effects. Clindamycin has pre- and postsynaptic activity plus direct effects on muscle contractility. Neither drug is a prodrug; this is a pharmacodynamic (not metabolic) interaction.
- Direction: Increased/prolonged blockade (dose-dependent; low-dose 300 mg IV clindamycin did not alter recovery).
- Onset: Rapid.
- Evidence: Theoretical.
- Management: Monitor with peripheral nerve stimulation, titrate/reduce pipecuronium dose, and anticipate the need for extended respiratory/ventilatory support.
What happens
Enhanced and prolonged neuromuscular blockade
Interaction Deep Dive
Giving clindamycin together with nondepolarizing muscle relaxants can result in excessive neuromuscular blockade, particularly when clindamycin is used at higher doses1234. When clindamycin was administered at a low dose (300 mg IV), recovery from the neuromuscular blocking effect of pipecuronium was not altered5. Clindamycin's effect may arise through both presynaptic and postsynaptic mechanisms, along with a direct influence on muscle contractility.
Why it happens (mechanism)
Additive effects
How to manage this interaction
This combination is managed by your anesthesia and hospital care team, not something you adjust yourself.
- Keep receiving both as prescribed during your procedure or treatment.
- Your team may monitor your muscle response and breathing more closely, often with a nerve-stimulation device.
- The pipecuronium dose may be adjusted and individualized by your care team, and they will anticipate the possible need for breathing (respiratory) support until the relaxant wears off.
If you are having surgery, it is worth telling your anesthesiologist and pharmacist about every antibiotic and medication you take so they can plan ahead.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
1 report — tap to read
a) A 58-year-old woman with severe rheumatoid arthritis underwent wrist arthrodesis while under general anesthesia. She received a small defasciculating dose of tubocurarine 3 mg together with fentanyl 1.5 mcg/kg intravenously (IV). Induction was achieved with thiopentone 4 mg/kg and succinylcholine 1.5 mg/kg, and anesthesia was maintained using nitrous oxide in oxygen along with isoflurane. Complete recovery of neuromuscular function was noted following the succinylcholine injection. At that time, clindamycin phosphate 2400 mg IV was administered; this represented an accidental overdose because 600 mg had been prescribed. Following surgery, the patient did not attempt any spontaneous breathing and failed to respond to painful stimulation. She was managed with calcium chloride, edrophonium, atropine, and neostigmine, with minimal effect. Nine hours after surgery the patient coughed and train-of-four (TOF) had returned to 1.0. Two hours after that, she was extubated and spontaneous respiration began. The authors proposed that clindamycin produced muscle relaxation mainly through a direct effect on contractility, though some pre-synaptic effects were also considered to take place 1.
Common questions
Can I take Clindamycin and Pipecuronium together?
Clindamycin can make the muscle relaxant pipecuronium work more strongly and last longer, mainly affecting breathing muscles, but your hospital team can manage this with close monitoring and dose adjustments. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Clindamycin and Pipecuronium interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "rapid". Effects can appear quickly, often within about 24 hours of combining the drugs.
How is the Clindamycin and Pipecuronium interaction managed?
This combination is managed by your anesthesia and hospital care team, not something you adjust yourself. Keep receiving both as prescribed during your procedure or treatment. Your team may monitor your muscle response and breathing more closely, often with a nerve-stimulation device. The pipecuronium dose may be adjusted and individualized by your care team, and they will anticipate the possible… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Clindamycin or Pipecuronium need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there anything you'd monitor while I'm on both?
References (5)
- Al Ahdal O & Bevan DR: Clindamycin-induced neuromuscular blockade. Can J Anaesth 1995; 42:614-617. PubMed
- Ostergaard D, Engbaek J, & Viby-Mogensen J: Adverse reactions and interactions of the neuromuscular blocking drugs. Med Toxicol Adverse Drug Exp 1989; 4:351-368. PubMed
- Rubbo JT, Gergis SD, & Sokoll MD: Comparative neuromuscular effects of lincomycin and clindamycin. Anesth Analg 1977; 56:329-332. PubMed
- Fogdall RP & Miller RD: Prolongation of a pancuronium-induced neuromuscular blockade by clindamycin. Anesthesiology 1974; 41:407-408. PubMed
- de Gouw NE, Crul JF, Vandermeersch E, et al: Interaction of antibiotics on pipecuronium-induced neuromuscular blockade. J Clin Anesth 1993; 5:212-215. PubMed
Keep reading about Clindamycin
Keep reading about Pipecuronium
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