February 28 2007, 12:34 pm PT | Posted in: Drugs
Hi I have been using Propecia for just over 6 months with no visible benefits so far. I understand that it can take anwhere up to 18 months for you to see results.
The trichologist that I have been seeing and who prescibed the Propecia has told me that the half life is such that I only need to take it every other day. Which is what I’ve been doing for the last 6 months. Is this correct?
Thanks for your site its a great help.
Half life of Propecia is around 4 hours. The half life is the time it takes half of the drug to be out of your blood stream. Let’s do the math…
6am - take Propecia (assume 100% got into your blood stream…)
10am - 50% of Propecia is in your blood stream
2pm - 25% of Propecia is in your blood stream
6pm - 12.5% of Propecia is in your blood stream
10pm -6.25% of Propecia is in your blood stream
2am - 3.125% of Propecia is in your blood stream
6am - (a day later) only 1.5625% of Propecia is in your blood stream
Realistically, all the Propecia is out of your blood stream after 24 hrs. That is why you take Propecia once a day.
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Balding Forum
Dr Rassman,
One point you may not be familiar with, the AR2 enzyme impacted by Propecia requires up to 30 days to regenerate. Though the half like is very short the effects are quite long lasting, so taking it every other day is not a consequence and will offer virtually the same results as every day!