Question

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4. Calculate the following dosage. Use labels where provided. Round oral liquids to the nearest tenth as indicated and mark the medicine cup where the dose should be. Order: Lithium citrate 0.6 g p.o. b.i.d2 times a de NDC 0054- 3527-63 500mL Available: LITHIUM Citrate Syrup USP Dosage: mEq Indicate the dosage on the medication cup 8 mEq per 5 mL Each 5 mL contains 8 mEq of LITHEUM ION (Equivaient to 300 mg of Lhium Carbonate SUGAR FREE g00ッ z n

Answer 1

Answer

* Calculation of dose of lithium.

          Formula = Desired dose / Dose in hand * Quantity.

             Here

                  Desired dose (D) = 0.6 g.

                      Convert gm to mg for calculation.

                                   1 gm = 1000 mg.

                  So

                      Desired dose(D) = 0.6 * 1000

                                                  = 600 mg ( equivalent to 16 mEq lithium)

                      Dose in hand (H) = 8 mEq ( equivalent to 300 mg lithium)

                             Quantity (Q) = 5 ml

          As per formula

                     Dose of lithium = D/H *Q

                                              = 16 / 8 * 5

                                              = 2 * 5

                                              = 10 mEq.