HESI Pharm Dosage Calculations with Rationales 2024

A client who weighs 79 pounds is receiving clomipramine (Anafranil) PO. The practical nurse (PN) refers to the published drug literature which recommends the dose of 3 mg/kg/day. How many mg should the PN determine is the recommended dose for this client? - Rationale 2.2 pounds = 1 kg, so 79 pounds = 35.9090 kg35.9090 Kg x 3 mg = 107.7 or 108 mg/day 108!! A client who weighs 40.6 kg is receiving ethacrynic acid (Edecrin) PO. The practical nurse (PN) refers to the published drug literature which recommends the dose of 1 mg/kg/dose. What dose in mg should the practical nurse (PN) determine is the recommended dose for this client? (Enter numerical value only. If rounding is required, round to the nearest whole number.) - Rationale 1 mg/kg/dose40.6 kg x 1 mg/1 kg/dose = 40.6 mg or 41 mg/dose 41!! Promazine 0.1 grams PO is prescribed for an older client who is agitated. Promazine is labeled in 50 mg tablets. How many tablets should the PN administer to the client? (Enter numerical value only.) - Rationale 0.1 gram x 1000mg/1 gram = 0.1 x 1000 = 100 mgD./ H = 100 / 50 = 2 tablets A child who weighs 17.1 kg is receiving chloral hydrate liquid. The practical nurse (PN) refers to the published drug literature which recommends the dose of 25 mg/kg/dose. What dose in mg should the practical nurse (PN) determine is the recommended dose for this child? (Enter numerical value only. If rounding is required, round to the nearest whole number.) - Rationale 17.1 kg x 25 mg/1kg/dose = 427.5 or 428 mg/dose 428!!! A client receives a prescription for an intravenous infusion 0.45% sodium chloride 500 ml to be infused over 6 hours. The practical nurse should program the infusion pump to deliver how many ml/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number.) - Rationale Calculate using Volume/Time: 500 ml/6 hours = 83.3 ml/hour 83!!!!! A client receives a prescription for tobramycin sulfate (Nebcin) 0.128 grams IV q8 hours. Tobramycin is available in liquid concentration of 40 mg/ml. How many ml should the practical nurse administer? (Enter numeric value only. If rounding is required, round to the nearest tenth.) - Rationale First using the known conversion: 1 gram = 1000 mg = 0.128 gram = 128 mg Next use the Desired/Have x 1 ml = 128 mg/40 mg x 1ml = 3.2 ml A 49-year-old client with myasthenia gravis is receiving pyridostigmine (Mestinon) 126 mg PO every 4 hours. The available form is 60 mg in 5 ml syrup. How many ml should the practical nurse administer? (If rounding is required, round to the nearest tenth.) Rationale Fill in the blank - Using the formula, Desired dose / dose on Hand x Quantity of volume on hand (D/H x Q): 126 mg / 60 mg x 5 ml = 10.5 ml The healthcare provider prescribes a continuous intravenous infusion of dextrose 5% and 0.45% sodium chloride witth KCl 20 mEq/1000 ml to be delivered over 8 hours. The practical nurse should program the infusion pump to deliver how many ml/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number.) - Rationale Using the formula volume/time: 1000 ml/8 hours = 125 ml/hour