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The half life of spironolactone is 2 hours or less. That means it should be out of the body in about 4 hours. However the half life of its metabolites is 13-24 hours. That means out of the body in up to two days.
The official
Animal studies at the maximum human dose showed feminization of male fetuses during early pregnancy and indications of endocrine dysfunction in both male and female offspring during late pregnancy that persisted into adulthood.
You are not at the maximal human dose (eg 200 mg/day), nor do you intend to take it into early pregnancy. Amazingly, MULTIPLE literature searches at the National Library of Medicine site did not yield even one case study reporting adverse effects on a baby inadvertently exposed to spironolactone in early pregnancy
Bottom line you should talk with your OB to get the most for sure answer. This is just information to help you ask the best questions.
Yours,
Jane
Thank you!
Kathleen
MULTIPLE literature searches at the National Library of Medicine site failed to yield any studies or even single case reports of spironolactone caused miscarriages.
Given the medications you were receiving I would wonder if you have been diagnosed with PCOS. While the background rate of early pregnancy loss might be as high as 15-20% after a positive pregnancy test (NIH, 2010), women with PCOS have long been suspected of having a higher rate than non-PCOS patients. Here is the most recent review citation I could find at the National Library of Medicine site on this:
Ugeskr Laeger. 2011 Feb 7;173(6):425-30.
[Polycystic ovary syndrome and miscarriage>.
[Article in Danish>
Truelsen MK, Clausen HV.
Source
Gyn?kologisk-obstetrisk Afdeling, Herlev Hospital, Denmark. s_pette@yahoo.dk
Abstract
Polycystic ovary syndrome (PCOS) causes impaired fertility and is assumed to be associated with increased risk of miscarriage. This paper reviews the literature according to the principles of evidence-based medicine to establish whether PCOS and the clinical findings lead to an increased miscarriage rate. It is not possible to confirm any association between PCOS and miscarriage. Increased luteinizing hormone, androgens and plasminogen activator inhibitor-1 activity as well as obesity and impaired endometrial blood flow are to some degree associated with miscarriage.
Kathleen, hopefully your reproductive endocrinologist or infertility specialist's regimen will continue to induce successful ovulations/conceptions. Also, that you can carry a full term infant.
In Support,
Jane
You have been such a huge help. I actually found out that it wasn't a miscarriage, rather my first menstrual cycle in years! Great news! My RE started me on Letrozole 2.5mg yesterday (day 3-7). I am now wondering if there are interactions with spironolactone and Letrozole? Does spiro decrease effectiveness of Letrozole?
By the way, yes I have been diagnosed with PCOS although I am not a typical PCOS. I am an avid runner and in a healthy weight range. I also have a diagnosis of Hypothalamic Amenorrhea, therefore I have cut back my exercise considerably.
Any thoughts on the spiro/letrozole question would be much appreciated.
Thank you!!!
Kathleen
You have been extremely helpful! Thank you for taking the time to reply. So, I found out it was not a miscarriage, rather my first menstrual cycle in years - which is great news. I must have had a false positive.
So, my RE put me on Letrozole 2.5mn days 3-7 ( I am on day 2). My question now is this: does spironolactone decrease the effectiveness of letrozole since once seems to increase estrogen (spiro) and one blocks estrogen (letrozole). Any insights would be greatly appreciated.
P.S. Yes, I have a PCOS diagnosis and also a hypothalamic amenorrhea diagnosis. I am an avid runner, and since this diagnosis I have decreased my running considerably.
Any infor re: letrozole and spiro would be greatly appreciated.
Thanks again for your help.
Kathleen

I feel like am in the same boat you are in... I had been on birth control for several years, then stopped taking birth control eight months ago. I started getting bad cystic acne a couple months after I quit taking birth control. I went on spironolactone, which helped clear up my acne within five months. I have not been diagnosed with PCOS, but due to the acne and irregular periods, my doctor thinks I have it. I am normal body weight, though. Now, my husband and I want to try to get pregnant, but I am afraid that the acne will return when I go off the spironolactone.
So, have you gotten off the spironolactone yet? If so, has your acne returned?
Funny that you just posted this because I actually made the leap last Sunday and went off the Spiro. I finally went off because I am undergoing infertility treatments, and am taking some injectable gonadotropins in the hopes this will finally make me pregnant. I was worred the Spiro would decrease the effectiveness of the medications, and did not want to chance it. So, four days later my skin still looks great, but I think this is because these medications significantly increase my estrogen, and keep my PCOS androgens at bay. I am a very physically fit person and it took months for them to finally do an ultrasound to see if I really had PCOS -- which I did. I highly recommend that you request this so you can get the treatment you need sooner rather than later. Best of luck to you: )
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