Stick to less than 25 micro grams.

The best way to measure is to put some tabs into a small flask of distilled water or liquor and let it sit for a few days. Then you can measure out a few MLs with a syringe and dose that way. You just have to divide the total micro grams you put in by the total MLs of the bottle. Then you can calculate how many MLs to take every 4 days.