
Originally Posted by
hooker
1BCamaro:
Letro needs to be taken for 60 days to acheive stable blood plasma levels...(see excerpt from article I wrote below for the citation of the study that information is from).
Gino_Slayer:
Quoting from an article I wrote several months ago for BB4L...it's basically been cut and pasted, and edited (the original one is so sporadic) to be relevant to your question, but the short answer is that personally, I take 1mg of Letro per day...here's some information:
"Levels of estrogen are totally undetectable in any patients taking Letrozole, and it has even been used to increase testosterone to normal levels (from sub-normal ones) and increase LH, FSH and SHBG (Epilepsy Behav. 2004 Apr;5(2):260-3). .... An effective dose of Letrozole is 1-2.5 mg/day (I use 1mg/day), but be forewarned, it can kill your sex drive, and could decrease IGF levels. On the other hand, I've seen studies where it increases IGF levels. Also worth noting is that there's a rebound effect when you come off Letrozol. What can I say? Letrozole's effects on serum lipids (cholesterol, both HDL and LDL) are, in the words of one researcher: "inconsistent. "And compared with Aromasin and Arimidex, In non-cellular systems, letrozole is 2-5 times more potent than anastrozole and exemestane in its inhibition of the aromatase enzyme and activity, and in cellular systems it is 10-20x more potent! Letrozole (2.5mg daily) also achieved a much greater suppression of the plasma concentrations of both estrone and estrone sulphate (estrogens) than anastrozole (1mg daily) and a greater inhibition of in vivo aromatization also (sorry for the geek-speak.it's over for now.). ( J Steroid Biochem Mol Biol. 2003 Oct;87(1):35-45.).... you need to take Letrozole for 60 days to get a steady blood plasma level. ....Letrozole has a whopping 2-4 day (!) ½ life (Clin Cancer Res. 2003 Jan;9(1 Pt 2):468S-72S.). "
Hope this helps...