Local Anesthetic Dose Calculator | HealthCalculum

Calculate the maximum safe dose of local anesthetics (lidocaine, bupivacaine, ropivacaine, mepivacaine) based on patient weight and epinephrine use.

Calculate Dose

kg

Note: This is the maximum recommended dose. Adjust based on patient condition and application site.

What is Local Anesthetic Dose?

The local anesthetic dose refers to the maximum safe amount of medication that can be administered to a patient to produce local anesthesia or analgesia without causing systemic toxicity. Toxicity from local anesthetics can affect the central nervous system and cardiovascular system, being potentially fatal if not recognized and treated appropriately.

Recommended Doses by Anesthetic

Lidocaine

without epinephrine: 4.5 mg/kg | with epinephrine: 7 mg/kg

Bupivacaine

without epinephrine: 2 mg/kg | with epinephrine: 3 mg/kg

Ropivacaine

without epinephrine: 3 mg/kg | with epinephrine: 4 mg/kg

Mepivacaine

without epinephrine: 5 mg/kg | with epinephrine: 7 mg/kg

Scientific References

  1. 1. Becker DE, Reed KL. Local anesthetics: review of pharmacological considerations. Anesth Prog. 2012;59(2):90-101.
  2. 2. Rosenberg PH, Veering BT, Urmey WF. Maximum recommended doses of local anesthetics: a multifactorial concept. Reg Anesth Pain Med. 2004;29(6):564-575.
  3. 3. Neal JM, Barrington MJ, Fettiplace MR, et al. The Third American Society of Regional Anesthesia and Pain Medicine Practice Advisory on Local Anesthetic Systemic Toxicity. Reg Anesth Pain Med. 2018;43(2):113-123.

What is Local Anesthetic Dose?

The local anesthetic dose refers to the maximum safe amount of medication that can be administered to a patient to produce local anesthesia or analgesia without causing systemic toxicity. Toxicity from local anesthetics can affect the central nervous system and cardiovascular system, being potentially fatal if not recognized and treated appropriately.

Frequently Asked Questions

What is the maximum safe dose of lidocaine?
The maximum dose of lidocaine is 4.5 mg/kg without epinephrine and 7 mg/kg with epinephrine. For a 70kg adult, this equals approximately 300mg without epinephrine and 500mg with epinephrine.
Why does epinephrine increase the maximum dose?
Epinephrine causes vasoconstriction at the injection site, slowing absorption of the local anesthetic into the bloodstream. This allows higher total doses to be administered safely while maintaining lower plasma concentrations.
What are the signs of local anesthetic toxicity?
Early signs include circumoral numbness, metallic taste, tinnitus, and dizziness. Progression includes tremors, seizures, hypotension, arrhythmias, and cardiovascular collapse. Immediate treatment with intravenous lipid emulsion (Intralipid) may be life-saving.
Can I use this calculator for pediatric patients?
Yes, the calculation is based on weight, so it applies to both adults and children. However, pediatric patients may require additional considerations and consultation with a pediatric anesthesiologist is recommended for complex cases.

Related Calculators

ASA Classification - Preoperative Physical StatusBody Surface Area (BSA) Calculator | HealthCalculumDrug Dose Calculator|HealthCalculum