The name is an obvious rip off of a real drug called Nolvadex, one of several trade names for tamoxifen. This is a mixed agonist/antagonist of estrogen. Estrogen is produced from your own natural testosterone by an enzyme, mostly present in peripheral fat, called aromatase. So you have probably heard of aromatase inhibitors in weight lifters. The good news about tamoxifen is that it blocks testosterone effects in certain tissue like the breast (which is why it is used to control certain breast cancers and why it is used by bodybuilders who take testosterone supplements to prevent breast development or gynecomastia). But it works like an estrogen in certain ways, like favorably modifying your lipid profile and encouraging bone density. Tamoxifen can be obtained generically without a prescription through Mexican pharmacies (for example, under the name of Fenobest or tamoxifeno). I have found Medsmex.com to be extremely reliable and conscientious. And I do not own stock in it. A reasonable dose of tamoxifen would be 20 mg per day. DO NOT TAKE MORE. You have probably heard that women on birth control pills having a higher rate of blood clots, esp. if they smoke. This could theoretically happen with high doses of tamoxifen.
I have been rather timid ordering testosterone supplements on line. I am always afraid the website is a cover for some FDA/FBI black ops organization and that I will get busted and end up in Guantanamo. When I was trying to build more muscle mass, I also took Omifin (one of the trade names for Clomid). This is another anti-estrogen, but with a twist. Your hypothalamus controls your pituitary gland, but actually measures the level of estrogens to gauge how much steroid is in your system. So Clomid blocks these hypothalamic estrogen effects and tricks your pituitary into making more FSH and LH, which are peptides that stimulate your gonads (male and female). So theoretically in men, it can raise your native testosterone levels--without having to take exogenous testosterone supplements. Exogenous testosterone is sensed by the hypothalamus (because of the estrogens that get converted from it), which leads to decreased FSH/LH--which leads to shrunken balls. Clomid is used "legitimately" to stimulate the ovaries of infertile women. But be forewarned, if you are bi, because in theory this could make you a daddy if you are not careful. Clomid is also used clinically to test for testicular failure--if you take 50 to 100 mg daily for 10 days, your plasma testosterone values should double--if not, you have poorly functioning 'nads. Do not take Clomid continuously for long periods of time because it can cause visual side effects--the most common of these is persistence of vision--you get up to pee in the middle of the night, turn on the light and start walking to the bathroom, but the images your eyes sense are slightly time lagged. This is a really neat effect, mainly occurring when your eyes have been closed for a while (so less of a problem during the day)--this is fortunately temporary. Rarer, but more serious is the possibility of shrinkage of the vitreous humor in your eyeballs, creating clefts between it and the retina.
Oh, and if you are thinking of enhancing your testosterone levels, consider also taking Propecia simultaneously (or the generic finasteride)--this blocks conversion of testosterone into dehydrotestosterone (DHT) which is the form of testosterone that causes your prostate to enlarge, beard growth, and, if you are predisposed, baldness. Finasteride can prevent this. Propecia is 1 mg per day. 5 mg per day is the dose used for shrinking the prostate (to help older men pee but also for treatment of prostate cancer). In theory, the higher doses could also result in smaller ejaculates. It is my understanding that the blocked conversion of testosterone into DHT leads to a slightly higher plasma testosterone levels. Reduction of DHT shouldn't interfere with building muscle mass, as I am pretty sure I read somewhere that muscle reacts to testosterone, but only minimally to DHT.