The correct answer is 500mg.
First convert the ratio strength to a percentage(0.2%).
Drug X accounts for 0.0396 g of NaCl.
It would require 0.54 g of NaCl if that was all we were using.
Lastly, 0.54 g - 0.0396 = ~ 0.5 g NaCl ( or 500 mg, rounded as per the instructions ).
Take prenatal vitamins with folic acid.
Maintain a healthy weight
Avoid alcohol, cigarettes, and illegal drugs.
Eat healthy food.
Hmm, there’s no time line on coming out, so take your time. Do it when it feels right.