Study explains why patients treated with Propecia may have increased depression

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Nelson Vergel

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J Steroid Biochem Mol Biol. 2015 Feb;146:74-9. doi: 10.1016/j.jsbmb.2014.03.012. Epub 2014 Apr 6.

Patients treated for male pattern hair with finasteride show, after discontinuation of the drug, altered levels of neuroactive steroids in cerebrospinal fluid and plasma

Caruso D1, Abbiati F1, Giatti S1, Romano S1, Fusco L2, Cavaletti G2, Melcangi RC3.

Abstract
Observations performed in a subset of patients treated for male pattern hair loss indicate that persistent sexual side effects as well as anxious/depressive symptomatology have been reported even after discontinuation of finasteride treatment. Due to the capability of finasteride to block the metabolism of progesterone (PROG) and/or testosterone (T) we have evaluated, by liquid chromatography-tandem mass spectrometry, the levels of several neuroactive steroids in paired plasma and cerebrospinal fluid (CSF) samples obtained from post-finasteride patients and in healthy controls. At the examination, post-finasteride patients reported muscular stiffness, cramps, tremors and chronic fatigue in the absence of clinical evidence of any muscular disorder or strength reduction. Although severity of the anxious/depressive symptoms was quite variable in their frequency, overall all the subjects had a fairly complex and constant neuropsychiatric pattern. Assessment of neuroactive steroid levels in CSF showed a decrease of PROG and its metabolites, dihydroprogesterone (DHP) and tetrahydroprogesterone (THP), associated with an increase of its precursor pregnenolone (PREG). Altered levels were also observed for T and its metabolites. Thus, a significant decrease of dihydrotestosterone (DHT) associated with an increase of T as well as of 3α-diol was detected. Changes in neuroactive steroid levels also occurred in plasma. An increase of PREG, T, 3α-diol, 3β-diol and 17β-estradiol was associated with decreased levels of DHP and THP. The present observations show that altered levels of neuroactive steroids, associated with depression symptoms, are present in androgenic alopecia patients even after discontinuation of the finasteride treatment. This article is part of a Special Issue entitled 'Sex steroids and brain disorders'.
 
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ratbag

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I was reading some comments from Dr. Crisler posted at Peak and he states that there is no effect from finasteride /Propecia creams that you rub into your scalp. This of course is very different than taking oral finasteride . A lot of people do not know this and assume it's all the same thing.
 
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