What medications are used in a lumbar puncture (LP)?

Updated: Aug 02, 2018
  • Author: Gil Z Shlamovitz, MD, FACEP; Chief Editor: Helmi L Lutsep, MD  more...
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The amount of lidocaine provided in most kits is often inadequate. The authors recommend supplementing the kit with a 10-mL syringe and a bottle of 1% lidocaine. Make sure not to exceed the maximal recommend dose of 4.5 mg/kg of lidocaine. A smaller needle (27 gauge, 1.25 in.) may be used for infiltration. Smaller needles are shown to be associated with less pain during local anesthesia.

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