A patient must take 300 mg of a medication four times per day. The medication is available in a concentration of 40 mg/mL. How many teaspoons are equal to the 300 mg dose?
½
1
1 ½
3
1 ½
Rationale: One teaspoon is equivalent to 5 mL. Therefore, when 40 mg/mL is available, multiply by 5 = 40 x 5 = 200 . Since the patient must take 300 mg, divide 200 by 300 = 1 ½ mL.
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