A nurse is reinforcing teaching with a parent of an infant who has a prescription for amoxicillin 100 mg PO every 8 hr. Available is amoxicillin suspension 200 mg/5 mL. The nurse should tell the parent to administer how many tsp per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)

Desired dose: 100 mg Concentration of available amoxicillin suspension: 200 mg/5 mL Steps to find the volume to administer (in teaspoons): Calculate the volume in milliliters (mL): Volume (mL) = Desired dose (mg) / Concentration (mg/mL) Volume (mL) = 100 mg / 200 mg/5 mL Convert milliliters (mL) to teaspoons (tsp) considering rounding: Since 1 teaspoon (tsp) is approximately equal to 5 mL, we can directly convert while considering rounding to avoid unnecessary precision loss. Since 5 mL is divisible by 200 mg (desired dose), rounding won't affect the final answer significantly. Therefore, Volume (tsp) = Volume (mL) / Conversion factor (mL/tsp) (rounded to nearest tenth) Volume (tsp) = 100 mg / (200 mg/5 mL) ≈ 0.5 tsp (rounded to nearest tenth)