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  1. #1
    Senior Member
    Join Date
    Mar 2011

    Default why does propecia take so long to work?

    can anyone tell me the pharmacological mechanism behind the use of propecia? I've read that it lowers DHT by up to 60-80% in the body within the first week of taking it, but why is it then that it can take a minimum of 3 months and up to a year to even stop hair falling out? If it attacks the enzyme which is the root cause of the falling out then why does its effect take months and months to show?

    Why am I shedding hair all of a sudden? I think I started shedding before taking prop (been 1 and a half months now) and it still hasn't stopped..

  2. #2
    Join Date
    Mar 2011


    Did you noticed that your hair got thinner when about a month after starting propecia? Thats what happened to me

  3. #3
    Senior Member
    Join Date
    Mar 2011


    thanks spex that was very useful.

  4. #4
    Dr Representative Spex's Avatar
    Join Date
    Nov 2008


    No worries
    SPEXHAIR - UK Representative and Patient Advisor - Spexhair.com

    Surgeons I represent:
    Dr. Alan Feller, IAHRS Member
    Dr. William Lindsey, IAHRS Member
    Dr. Bijan Feriduni, IAHRS Member
    Dr. Scott Alexander, IAHRS Member
    Watch and listen to regular segments and interviews on The Bald Truth UK show

    I am not a Doctor and all my posts are my own personal opinion based on 10 Hair transplants, SMP into my scar and 10 years consulting on and offline. Always consult with your own family doctor prior to embarking on any form of hair loss treatment or surgery.

  5. #5
    Senior Member drybone's Avatar
    Join Date
    Dec 2012


    thanks spex.

    That was very useful

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