# Lidocaine Dosage Calculations

by Michelle Liwosz
(Middlebur, Ohio. USA)

Dosage Calculations

Mr. Golden had an MI (Myocardial Infarction, heart attack) and now has a run of V-tach (Ventricular Tachycardia, fast heart rhythm).

You are to give him Lidocaine 50 mg. IVP. Lidocaine comes in a 5 ml, prefilled syringe containing 20 mg/ml.

How many ml do you give?

### Comments for Lidocaine Dosage Calculations

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 Nov 21, 2012 Rating Dosage Calculations by: Staff AnswerDesired Dose: 50 mg of Lidocaine Concentration: 20 mg per ml in prefilled syringe (note that the concentration does not depend upon how many ml each prefilled syringe holds)` Desired dose ml to be given = ───────────── ConcentrationYou have already identified the components of the doctor’s order. To find the dosage, fill in the formula. 50 mg ml to be given = ──────────── 20 mg per mlmg per ml is really a fraction of the units of measurement mg/ml 50 mg ml to be given = ─────────── 20 mg / ml 50 * mg ml to be given = ────────────── 20 * (mg / ml) 50 * mg * ml ml to be given = ───────────── 20 * mgthe unit mg in the numerator cancels with the unit mg in the denominator 50 mg * ml ml to be given = ───────────── 20 mg ml to be given = 2.5 mlFinal Answer: ml to be given = 2.5 ml ` Thanks for writing.Staff www.solving-math-problems.com