What is the concentration of epinephrine in a local anesthetic solution labelled 1:100,000?

  • Correct answer

    0.01 mg/mL

  • 0.1 mg/mL

  • 0.001 mg/mL

  • 1 mg/mL

This question is one of 15 in AFK practice: Pharmacology, local anesthesia and emergencies. Test yourself on all of them.

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Explanations

  • 1:100,000 means 1 g in 100,000 mL, which is 1,000 mg/100,000 mL or 0.01 mg/mL. 0.1 mg/mL corresponds to a 1:10,000 dilution.

    Source: Malamed, Handbook of Local Anesthesia; 4% Astracaine Dental product monograph link — oneguy

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