**Why do some prefer nolva over clomid post cycle**

[BIGEDD]

Other than the acne from clomid and a bit of depression it the best for recovering natural test reproduction which in turn will help you keep your gains.

Here's something about nolva:
A very rare but all the more serious problem of Nolvadex is that in some cases it does not lower the estrogen level but can increase it. Another disadvantage is that it can weaken the anabolic effect of some steroids. The reason is that Nolvadex, as we know, reduces the estrogen level. The fact is, however, that certain steroids -especially the various testosterone compounds-can only achieve their full effect if the estrogen level is sufficiently high. Those who are used to the intake of larger amounts of various steroids do not have to worry about this. Athletes however, who predominantly use mild steroids such as Primobolan, Winstrol, Oxandrolone, and Deca-Durabolin should carefully consider whether or not they should take Nolvadex since, due to the compound's already moderate ana-bolic effect, an additional loss of effect could take place, leading to unsatisfying results.


more:
A rarely observed but welcome characteristic of Nolvadex is that it has a direct influence on the hypothalamus and thus, by an in-creased release of gonadotropine, it stimulates the testosterone pro-duction in the testes. This does not result in a tremendous but still a measurable increase of the body's own testosterone. This effect, however, is not sufficient to significantly increase the testosterone production reduced by anabolic/androgenic steroids.


Clomid:hypothalamohypophysia
Clomid also has a strong influence on the hypothalamohypophysia testicular axis. It stimulates the hypo-physis to release more gonadotropin so that a faster and higher re-lease of FSH (follicle stimulating hormone) and LH (luteinizing hor-mone) occurs. This results in an elevated endogenous (body's own) testosterone level. Clomid is especially effective when the body's own testosterone production, due to the intake of anabolic/androgenic steroids, is suppressed. In most cases Clomid can normalize the tes-tosterone level and the spermatogenesis (sperm development) within 10- 14 days. For this reason Clomid is primarily taken after steroids are discontinued. At this time it is extremely important to bring the testosterone production to a normal level as quickly as possible so that the loss of strength and muscle mass is minimized.


I rather cope with the sides from the clomid and keep my gains and my nuts then used nolva post cycle.

 

[wartime100]

They do different things. How can they be compared?

 

[Dr.M]

Because others argue they are not so different, and that Nolvadex is superior. However still yet others say use both post cycle, but that clomid produces more problems in more people than nolvadex does.

 

[madmatt]

Nolvadex is antiestrogenic. Clomid helps to aid in reproduction of testosterone.

However, both drugs block negative feedback caused by estrogen at the hypothalamus and pituitary. This fosters the release of pituitary hormones. Because Novadex helps restore a balance in hormone levels, it should be preferred over Clomid. Compared Nolvadex is the stronger agent.

Remember that Nolvadex only blocks the effect of estrogen that is present in the body. If it is removed at a time when estroden levels are still unusually high, related side effects can quickly become pronounced. Also too much Nolvadex can prevent gains because AS work best when sufficient levels of estrogen are present.

Most side effects of Clomid usually only takes place in women. They include hot flashes, nausea, dizziness, headaches and temporarily blurred vision. This is because they feel the effects of estrogen manipulation much more then men.

 

[BIGEDD]

bump

 

[THeMaCHinE]

http://www.mindandmuscle.net/magazine/i6clomid.html

Clomid, Nolvadex and Testosterone Stimulation
By William Llewellyn


Introduction

I have received a lot of heat lately about my preference for Nolvadex over Clomid, which I hold for all purposes of use (in the bodybuilding world anyway); as an anti-estrogen, an HDL (good) cholesterol-supporting drug, and as a testosterone-stimulating compound. Most people use Nolvadex to combat gynecomastia over Clomid anyway, so that is an easy sell. And for cholesterol, well, most bodybuilders unfortunately pay little attention to this important issue, so by way of disinterest, another easy opinion to discuss. But when it comes to using Nolvadex for increasing endogenous testosterone release, bodybuilders just do not want to hear it. They only seem to want Clomid. I can only guess that this is based on a long rooted misunderstanding of the actions of the two drugs. In this article I would therefore like to discuss the specifics for these two agents, and explain clearly the usefulness of Nolvadex for the specific purpose of increasing testosterone production.




Clomid and Nolvadex


I am not sure how Clomid and Nolvadex became so separated in the minds of bodybuilders. They certainly should not be. Clomid and Nolvadex are both anti-estrogens belonging to the same group of triphenylethylene compounds. They are structurally related and specifically classified as selective estrogen receptor modulators (SERMs) with mixed agonistic and antagonistic properties. This means that in certain tissues they can block the effects of estrogen, by altering the binding capacity of the receptor, while in others they can act as actual estrogens, activating the receptor. In men, both of these drugs act as anti-estrogens in their capacity to oppose the negative feedback of estrogens on the hypothalamus and stimulate the heightened release of GnRH (Gonadotropin Releasing Hormone). LH output by the pituitary will be increased as a result, which in turn can increase the level of testosterone by the testes. Both drugs do this, but for some reason bodybuilders persist in thinking that Clomid is the only drug good at stimulating testosterone. What you will find with a little investigation however is that not only is Nolvadex useful for the same purpose, it should actually be the preferred agent of the two.

Studies conducted in the late 1970's at the University of Ghent in Belgium make clear the advantages of using Nolvadex instead of Clomid for increasing testosterone levels (1). Here, researchers looked the effects of Nolvadex and Clomid on the endocrine profiles of normal men, as well as those suffering from low sperm counts (oligospermia). For our purposes, the results of these drugs on hormonally normal men are obviously the most relevant. What was found, just in the early parts of the study, was quite enlightening. Nolvadex, used for 10 days at a dosage of 20mg daily, increased serum testosterone levels to 142% of baseline, which was on par with the effect of 150mg of Clomid daily for the same duration (the testosterone increase was slightly, but not significantly, better for Clomid). We must remember though that this is the effect of three 50mg tablets of Clomid. With the price of both a 50mg Clomid and 20mg Nolvadex typically very similar, we are already seeing a cost vs. results discrepancy forming that strongly favors the Nolvadex side.

Pituitary Sensitivity to GnRH


But something more interesting is happening. Researchers were also conducting GnRH stimulation tests before and after various points of treatment with Nolvadex and Clomid, and the two drugs had markedly different results. These tests involved infusing patients with 100mcg of GnRH and measuring the output of pituitary LH in response. The focus of this test is to see how sensitive the pituitary is to Gonadotropin Releasing Hormone. The more sensitive the pituitary, the more LH will be released. The tests showed that after ten days of treatment with Nolvadex, pituitary sensitivity to GnRH increased slightly compared to pre-treated values. This is contrast to 10 days of treatment with 150mg Clomid, which was shown to consistently DECREASE pituitary sensitivity to GnRH (more LH was released before treatment). As the study with Nolvadex progresses to 6 weeks, pituitary sensitivity to GnRH was significantly higher than pre-treated or 10-day levels. At this point the same 20mg dosage was also raising testosterone and LH levels to an average of 183% and 172% of base values, respectively, which again is measurably higher than what was noted 10 days into therapy. Within 10 days of treatment Clomid is already exerting an effect that is causing the pituitary to become slightly desensitized to GnRH, while prolonged use of Nolvadex serves only to increase pituitary sensitivity to this hormone. That is not to say Clomid won't increase testosterone if taken for the same 6 week time period. Quite the opposite is true. But we are, however, noticing an advantage in Nolvadex.


The Estrogen Clomid


The above discrepancies are likely explained by differences in the estrogenic nature of the two compounds. The researchers' clearly support this theory when commenting in their paper, "The difference in response might be attributable to the weak intrinsic estrogenic effect of Clomid, which in this study manifested itself by an increase in transcortin and testosterone/estradiol-binding globulin [SHBG] levels; this increase was not observed after tamoxifen treatment". In reviewing other theories later in the paper, such as interference by increased androgen or estrogen levels, they persist in noting that increases in these hormones were similar with both drug treatments, and state that," …a role of the intrinsic estrogenic activity of Clomid which is practically absent in Tamoxifen seems the most probable explanation".

Although these two are related anti-estrogens, they appear to act very differently at different sites of action. Nolvadex seems to be strongly anti-estrogenic at both the hypothalamus and pituitary, which is in contrast to Clomid, which although a strong anti-estrogen at the hypothalamus, seems to exhibit weak estrogenic activity at the pituitary. To find further support for this we can look at an in-vitro animal study published in the American Journal of Physiology in February 1981 (2). This paper looks at the effects of Clomid and Nolvadex on the GnRH stimulated release of LH from cultured rat pituitary cells. In this paper, it was noted that incubating cells with Clomid had a direct estrogenic effect on cultured pituitary cell sensitivity, exerting a weaker but still significant effect compared to estradiol. Nolvadex on the other hand did not have any significant effect on LH response. Furthermore it mildly blocked the effects of estrogen when both were incubated in the same culture.


Conclusion


To summarize the above research succinctly, Nolvadex is the more purely anti-estrogenic of the two drugs, at least where the HPTA (Hypothalamic-Pituitary-Testicular Axis) is concerned. This fact enables Nolvadex to offer the male bodybuilder certain advantages over Clomid. This is especially true at times when we are looking to restore a balanced HPTA, and would not want to desensitize the pituitary to GnRH. This could perhaps slow recovery to some extent, as the pituitary would require higher amounts of hypothalamic GnRH in the presence of Clomid in order to get the same level of LH stimulation.

Nolvadex also seems preferred from long-term use, for those who find anti-estrogens effective enough at raising testosterone levels to warrant using as anabolics. Here Nolvadex would seem to provide a better and more stable increase in testosterone levels, and likely will offer a similar or greater effect than Clomid for considerably less money. The potential rise in SHBG levels with Clomid, supported by other research (3), is also cause for concern, as this might work to allow for comparably less free active testosterone compared to Nolvadex as well. Ultimately both drugs are effective anti-estrogens for the prevention of gyno and elevation of endogenous testosterone, however the above research provides enough evidence for me to choose Nolvadex every time.

In next month's follow-up article I will be discussing the role anti-estrogens play in post-cycle testosterone recovery. Most specifically, I will be detailing what a proper post-cycle ancillary drug program looks like, and explain why anti-estrogens alone are not effective during this window of time.


References: _

1. Hormonal effects of an antiestrogen, tamoxifen, in normal and oligospermic men. Vermeulen, Comhaire. Fertil and Steril 29 (1978) 320-7

2. Disparate effect of clomiphene and tamoxifen on pituitary gonadotropin release in vitro. Adashi EY, Hsueh AJ, Bambino TH, Yen SS. Am J Physiol 1981 Feb;240(2):E125-30

3. The effect of clomiphene citrate on sex hormone binding globulin in normospermic and oligozoospermic men. Adamopoulos, Kapolla et al. Int J Androl 4 (1981) 639-45