The prescription reads for diphenhydramine 10 mg PO every 4-6 hours as needed for runny nose and allergy symptoms. Using the label below, how many mL will the nurse teach the parent to administer? Enter a numeric value only. Answer to the nearest whole mL

1. Determine the concentration of the diphenhydramine: The label states 12.5 mg/5 mL. 2. Set up a proportion to find the volume (in mL) needed: 12.5 mg / 5 mL = 10 mg / x mL 3. Solve for x: Cross-multiply: 12.5x = 10 * 5 12.5x = 50 x = 50 / 12.5 x = 4 mL Answer: The nurse should teach the parent to administer 4 mL.