Bupivacaine
Brand names: Marcain, Marcain Heavy (spinal)
Bupivacaine is a long-acting amide local anaesthetic used for infiltration, peripheral nerve blocks, and epidural and spinal anaesthesia in surgery and for postoperative and obstetric analgesia.
Adult dose
Paediatric dose
Dose adjustments
Bupivacaine or its metabolites are substantially excreted by the kidney; risk of toxic reactions may be greater in renal impairment. Impaired renal function should be considered when selecting the dose.
Dose auto-extracted from UK Summary of Product Characteristics (SPC) via the eMC; US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.
Liposomal bupivacaine (EXPAREL) in paediatric patients aged 6 years and older, as a single-dose field block for somatic post-operative pain from small- to medium-sized surgical wounds. Not established as a field block in children 1 to <6 years, nor as a nerve block in children 1 to <18 years. Must not be used in children under 1 year. Verify dose against a children's formulary.
Contraindications
- Hypersensitivity to the active substance or any excipient
- Hypersensitivity to amide-type local anaesthetics
- Obstetrical paracervical block anaesthesia (risk of foetal bradycardia or death)
- Intravascular administration
- Intra-articular administration
Side effects
- Hypoaesthesia oral (>=5%)
- Dysgeusia (common)
- Vomiting, constipation, nausea (common)
- Systemic toxic reactions — serious dysrhythmia, serious hypotension, and (rarely) convulsions or cardiac arrest
- Dizziness, somnolence, headache, hypoaesthesia (uncommon)
Interactions
- Other local anaesthetics — toxic effects are additive; co-administer with caution and monitor for local anaesthetic systemic toxicity (LAST)
- Bupivacaine HCl (immediate-release) — if admixed, HCl:liposomal ratio must not exceed 1:2 and total must not exceed 400 mg bupivacaine HCl equivalents in adults; redosing/overdose may increase risk of LAST
Clinical monograph
How it works
It reversibly blocks voltage-gated sodium channels in nerve membranes, preventing the initiation and conduction of nerve impulses.
Prescribing in practice
- Inadvertent intravascular injection or excessive dosing can cause severe, potentially fatal cardiotoxicity and central nervous system toxicity, so careful aspiration, incremental dosing, and resuscitation facilities including lipid emulsion are essential.
- It is more cardiotoxic than other local anaesthetics, and the concentrated formulation must never be used for intravenous regional anaesthesia.
- Maximum safe doses must account for the site of injection and patient factors, with caution in hepatic impairment.
Monitoring
Monitor cardiovascular and neurological status during and after administration, watching for early signs of systemic local anaesthetic toxicity.
Counselling the patient
- Numbness in the treated area is expected and wears off gradually.
- Tell your team immediately if you feel dizzy, notice ringing in your ears, or a metallic taste.
- Take care to protect the numb area from injury until sensation returns.
Evidence & guidelines
Bupivacaine is an established long-acting local anaesthetic with a well-defined efficacy and toxicity profile across regional anaesthesia techniques.
Reference: AAGBI LAST Guidelines 2023; Marcain SPC; NAP3 Report (Regional Anaesthesia); Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).
Related
Curated clinical cross-links plus same-class fallbacks.
- ASA Physical Status Classification · Pre-operative Risk
- Local Anaesthetic Maximum Dose Calculator · Drug Dosing
- Corrected QT Interval (Bazett) · ECG
- Bazett Corrected QT Interval (QTc) Calculator · Arrhythmia
- Long QT Syndrome (Schwartz Score) · Channelopathy / Sudden Cardiac Death
- SINS — Spinal Instability Neoplastic Score · Surgical Risk
- Major Trauma — Primary Survey (ATLS) · ATLS 10th Edition; JRCALC; NICE NG39
- Major Haemorrhage / Massive Transfusion · BCSH; RCOA; RCEM; RCS — BCSH Guidelines
- Burns — TBSA Estimation & Fluid Resuscitation · British Burn Association; EMSB; RCEM 2024
- Lower Gastrointestinal Bleed · NICE; BSG; ACPGBI — Commissioning Guide
- Acute Pancreatitis · NICE; IAP/APA; ACPGBI — CG104
- Hypertrophic Pyloric Stenosis · BAPS / RCPCH