NCLEX PREP: med math questions with correct answers

You are caring for a patient at home who must take magnesium hydroxide/aluminum hydroxide (Maalox) 30 mL PO. How will you instruct the patient to measure the dose using ordinary household measuring devices? CORRECT ANSWER 2 tablespoons OR One 30ml measuring cup from OTC cold medicine 1 TBSP equals 15ml A patient has a bottle of warfarin (Coumadin) 5 mg tablets at home. After his most recent international normalized ratio (INR), the doctor calls and tells him to take 7.5 mg/day. How many tablets (scored) should the patient take? CORRECT ANSWER 1.5 tablets Make sure patient has a pill cutter at home! You have an IVPB of ranitidine (Zantac) 50 mg in 50 mL D5W to run over 30 minutes. The tubing has a drip factor of 15. How many drops per minute will you set on the IV infusion controller? CORRECT ANSWER 25gtts/minute Use the IV flow rate formula for gtts/minute above. Multiply 50 mL (total volume) to 15 gtts (drop factor) to get 750 gtts. Divide 750 gtts with 30 minutes (time in minutes) to get 25 gtts/minute