Order: Furosemide 40mg IV push every 12 hours x 3 days.

have 50 mg

dont clue how to do this .

To calculate how many doses of 40mg of Furosemide you will need from a 50mg vial, you will need to divide the total amount available (50mg) by the amount needed per dose (40mg).

Here's how you can calculate it:

1. First, determine the total number of doses required. In this case, the physician has ordered the medication to be given every 12 hours for 3 days. Since there are 24 hours in a day, you will have a total of 6 doses (3 days x 2 doses per day).

2. Now, to find the total amount of Furosemide needed for all doses, multiply the amount per dose (40mg) by the number of doses (6). The result is 240mg (40mg x 6 doses).

3. Since you have a 50mg vial, you can calculate the number of vials needed by dividing the total amount needed (240mg) by the amount in each vial (50mg).

240mg / 50mg = 4.8

Since you cannot have a fraction of a vial, you will need to round up to the nearest whole number, which means you will need 5 vials of Furosemide.

To summarize, you will need 5 vials of 50mg Furosemide to administer a 40mg dose every 12 hours for 3 days.