Androgel is available in 1% strength. A provider prescribed it for a patient but would like to minimize side effects by starting treatment at a lower 0.3% strength. How much androgel should be added to a base gel to prepare 15 g of the desired strength?
To determine how much Androgel should be added to a base gel to prepare 15 g of the desired 0.3% strength, you'll need to use a ratio equation.
First, let's convert the desired strength from a percentage to a decimal. To do this, divide 0.3 by 100:
0.3% ÷ 100 = 0.003
Now, we can set up a ratio equation using the concentrations and the amounts of Androgel and the base gel. Let's call the amount of Androgel "x":
x(g of Androgel) / (15 g of mixture) = 0.003
To solve for "x" (the amount of Androgel), we can cross-multiply:
x = 0.003 * 15
x = 0.045
Therefore, you would need to add 0.045 g (or 45 mg) of Androgel to the base gel to prepare 15 g of the desired 0.3% strength.