Is taking 1/2 of a finasteride pill as good as taking one pill every other day?

Skipping a dose of finasteride (e.g. one pill every other day) is as effective as taking 1/2 of a pill every day because even though the blood half life is under 6 hours, the tissue fixation life is about 1 week. That means that it sticks to the hair follicle growth center for 1 week after taking the medication.