Bupivacaine

Bupivacaine, marketed under the brand name Marcaine among others, is a medication used to decrease sensation in a specific small area. In nerve blocks, it is injected around a nerve that supplies the area, or into the spinal canal's epidural space. It is available mixed with a small amount of epinephrine to increase the duration of its action. It typically begins working within 15 minutes and lasts for 2 to 8 hours.

Bupivacaine
Clinical data
Pronunciation/bjuːˈpɪvəkn/
Trade namesMarcaine, Sensorcaine, Posimir, others
AHFS/Drugs.comMonograph
License data
Pregnancy
category
  • AU: A
Routes of
administration
Parenteral, topical, implant
ATC code
Legal status
Legal status
  • AU: S4 (Prescription only)
  • US: WARNINGRx-only
  • EU: Rx-only
Pharmacokinetic data
Bioavailabilityn/a
Protein binding95%
MetabolismLiver
Onset of actionWithin 15 min
Elimination half-life3.1 hours (adults)
8.1 hours (neonates)
Duration of action2 to 8 hr
ExcretionKidney, 4–10%
Identifiers
  • (RS)-1-Butyl-N-(2,6-dimethylphenyl)piperidine-2-carboxamide
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard100.048.993
Chemical and physical data
FormulaC18H28N2O
Molar mass288.435 g·mol−1
3D model (JSmol)
Melting point107 to 108 °C (225 to 226 °F)
SMILES
  • O=C(C1N(CCCC1)CCCC)NC2=C(C)C=CC=C2C
  • InChI=1S/C18H28N2O/c1-4-5-12-20-13-7-6-11-16(20)18(21)19-17-14(2)9-8-10-15(17)3/h8-10,16H,4-7,11-13H2,1-3H3,(H,19,21) Y
  • Key:LEBVLXFERQHONN-UHFFFAOYSA-N Y
 NY (what is this?)  (verify)

Possible side effects include sleepiness, muscle twitching, ringing in the ears, changes in vision, low blood pressure, and an irregular heart rate. Concerns exist that injecting it into a joint can cause problems with the cartilage. Concentrated bupivacaine is not recommended for epidural freezing. Epidural freezing may also increase the length of labor. It is a local anaesthetic of the amide group.

Bupivacaine was discovered in 1957. It is on the World Health Organization's List of Essential Medicines. Bupivacaine is available as a generic medication. An implantable formulation of bupivacaine (Xaracoll) was approved for medical use in the United States in August 2020.

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