Pharmacology · Local anesthetics
Ropivacaine !
Long-acting amide local anaesthetic, related to bupivacaine but less cardiotoxic. Used for epidurals, nerve blocks and infiltration.
Updated 2026-11-01
Also called: Ropivacaine hydrochloride
There is no structure with ropivacaine. The figure shows levobupivacaine, a very similar local anaesthetic (also an S-enantiomer), in the inner pore of the human Nav1.7 sodium channel.
Mechanism of action
Ropivacaine blocks the voltage-gated sodium channel from inside the axon, like other local anaesthetics, and prevents the generation and conduction of nerve impulses. It is made as the pure S-enantiomer, because it is less toxic than the R form; it was developed in search of a long-acting local anaesthetic with less cardiac toxicity than bupivacaine. It is somewhat less potent than bupivacaine.
- The un-ionised form crosses the axon membrane
- Blocks the sodium channel from inside
- Pain conduction stops for hours
- Pure S-enantiomer: less cardiotoxic than bupivacaine
Pharmacokinetics
- Metabolism
- Hepatic; CYP1A2 forms its main metabolite, 3-hydroxy-ropivacaine.
- Elimination
- Kidney, mostly as metabolites.
Indications
- Surgical anaesthesia: epidural (including caesarean section), major nerve blocks and infiltration
- Acute pain: continuous or bolus epidural infusion (postoperative or labour) and infiltration
Adverse effects
Common
- Hypotension
- Nausea and vomiting
- Bradycardia
- Paraesthesia
Contraindications
- Hypersensitivity to ropivacaine or amide-type local anaesthetics
Key interactions
- Strong CYP1A2 inhibitors (for example, fluvoxamine)
- Greatly reduce its clearance and raise its levels.
- Other local anaesthetics and related antiarrhythmics
- Additive toxicity.
- Drugs that cause methaemoglobinaemia
- Higher risk of methaemoglobinaemia.
What is monitored
- Blood pressure, heart rate, ECG and saturation
- Consciousness and early signs of toxicity
- Level of sensory and motor block
Administration and safety
- For infiltration, nerve block and epidural use only; not for intravenous use or spinal anaesthesia.
- Aspirate before injecting and fractionate the dose; keep resuscitation equipment and lipid emulsion available.
- Not for intra-articular infusions.
Nursing care
- During epidural infusions: blood pressure, heart rate, block level and leg strength.
- If perioral numbness, tinnitus or agitation appear: stop the infusion and call for help.
- Check the catheter site and the integrity of the system.
Pregnancy and breastfeeding
Used epidurally in labour and caesarean section; it crosses the placenta rapidly and can cause maternal, fetal or neonatal toxicity.
Test yourself
Think of the answer, then tap the question to see it.
Why was ropivacaine developed?
To have a long-acting local anaesthetic with less cardiac toxicity than bupivacaine; it is marketed as the pure S-enantiomer.
Which enzyme inhibitor can greatly raise ropivacaine levels?
A strong CYP1A2 inhibitor, such as fluvoxamine.
Is ropivacaine more or less potent than bupivacaine?
Somewhat less potent.
Related drugs
← Back to the class: Local anesthetics
Educational content on how drugs work; not a prescribing guide and no substitute for a health professional's advice. No doses are given.
Sources: DailyMed - ROPIVACAINE HYDROCHLORIDE injection, solution (DailyMed (U.S. National Library of Medicine), 2026); Goodman & Gilman's The Pharmacological Basis of Therapeutics, 14th ed., ch. 25 (McGraw Hill, 2023); ATCDDD - ATC/DDD Index (WHO Collaborating Centre for Drug Statistics Methodology, 2026).
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Representative model, for educational purposes only.