Question

1. The drug order reads ASA grains Xq4h pm. for headache. You have ASA 300 mg tablets. How many tablets will you give? 90 10 50mg T X 300 mg grio (300 Jong = 6,50 mg groo - bdmg = 13% ng or 2 Yong 2. Order: Lasix 8 mg IM stat. Available: Lasix labeled 20mg/2ml. How much will you administer? 8ng = /20 mg Eng (am() = 20mg ame aml = 20mg - Ting 3. A client is ordered 50 milligrams of Aminophylline intravenously. 250 milligrams in 10 millilitres of liquid for IV Injection is available. How many millilitres will you administer?? ordered. 50 mg 050 mg in 10me 4 The physician orders 1.5 liters of Lactated Ringers solution to be administered intravenously to your patient over the next 12 hours. Calculate the rate of flow if the IV tubing delivers 20gtt/ml. 5. Give 300,000 U of penicillin G IM. In the medicine room you find a bottle of 5,000,000 U of crystalline penicillin in dry form. Add 8 mL diluent and shake. Each milliliter contains 600,000 U after reconstitution. What volume do you administer?

Answer 1

ANSWER.

1) Calculation of number of tablet required.

         Ordered dose = ASA grain X q4hr.

                  1 grain = 65 mg.

                  X = 10 grains.

      So

         Ordered dose = 65 * 10

                                = 650 mg.

          Available dose = 300 mg /tab.

Number of tablet required = Ordered dose/Available dose.

                                            = 650 / 300

                                            = 2.16

                                            = 2 tablet and 0.16 mg of one tablet.

2) Calculation of amount(ml) of drug administered.

      Formula = Desired dose/Dose in hand * Quantity.

    Here

         Desired dose(D) = 8 mg.

         Dose in hand (H) = 20 mg.

             Quantity (Q) = 2 ml.

As per above formula

      Amount(ml) of drug required = D/H * Q

                                                     = 8/20 * 2

                                                     = 0.4 * 2

                                                     = 0.8 ml.

3) Calculation of amount(ml) of drug administered.

         Formula = Desired dose/Dose in hand * Quantity.

    Here

          Desired dose (D) = 50 mg.

          Dose in hand (H) = 250 mg.

              Quantity(Q) = 10 ml.

As per above formula

      Amount(ml) of drug required = D/H * Q

                                                    = 50/250 * 10

                                                    = 0.2 * 10

                                                    = 2 ml.

4) Calculation flow rate.

      Flow rate(gtt/min) = Volume(ml) /Time(min) * Drop factor (gtt/ml).

   Here

          Volume(ml) = 1500 ml (1.5L).

          Time(min) = 720 min.

          Drop factor(gtt/ml) = 20 gtt/ml.

As per above formula

     Flow rate(gtt/min) = 1500 / 720 * 20

                                   = 2.08 * 20

                                   = 41.6 gtt/min.

5) Calculation of volume(ml) of drug required.

       Formula = Desired dose/Dose in hand * Quantity.

   Here

      Desired dose (D) = 300000 U.

      Dose in hand (H) = 600000 U.

        Quantity(Q) = 1 ml.

As per above formula

      Volume(ml) of drug required = D/H * Q

                                                    = 300000/600000 * 1

                                                    = 0.5 * 1

                                                    = 0.5 ml.