Question

question 2 (mandatory) (2 points)
a physician writes a prescription for proair hfa (albuterol sulfate) for chronic obstructive pulmonary disease (copd). the instructions state: inhale 1 to 2 mdi puffs (90 - 180mcg) q 4 - 6 hours.
how many mcg are needed to fill this rx per day?

Explanation:

Step1: Calculate the minimum number of puffs per day

The minimum time - interval is 4 hours. In a 24 - hour day, the number of time - intervals $n_{min}=\frac{24}{4}=6$. The minimum number of puffs per time - interval is 1. So the minimum number of puffs per day $P_{min}=6\times1 = 6$ puffs. Each puff is 90 mcg, so the minimum amount of drug per day $A_{min}=6\times90=540$ mcg.

Step2: Calculate the maximum number of puffs per day

The maximum time - interval is 6 hours. In a 24 - hour day, the number of time - intervals $n_{max}=\frac{24}{6}=4$. The maximum number of puffs per time - interval is 2. So the maximum number of puffs per day $P_{max}=4\times2 = 8$ puffs. Each puff is 180 mcg, so the maximum amount of drug per day $A_{max}=8\times180 = 1440$ mcg.

Answer:

The amount of mcg needed per day is between 540 mcg and 1440 mcg.