jThis is an interesting statement. Do you have this referenced somewhere?
Nolva and clomid are almost identical structurally. From a dosage perspective, nolva is more efficient (i.e. it takes less to exert desired effects), but clomid, dosed accordingly, should be as efficient as nolva because it is, for all intensive purposes, the same thing. I know I've used clomid to fight dbol gyno.
My understanding is that the misconception amongst bb circles that nolva is more efficient at gyno than clomid was purely based on the way the drugs were originally marketed by the pharmeceutical companies. (i.e. they were marketed for very different purposes -- one fertility, one breast tissue cancer -- even though they are nearly the same drug)
With all of this said, I'd still pick nolva as I believe it is a more efficient drug...
P.S. Not trying to be inflammatory, just trying to figure out if my understanding is flawed...
No problem.. Actually Rolaxiphene is the most effective at treating gyno, but I don't know anyone that carries it.
As for Nolva vs. Clomid.. they are close but studies suggest that nolva is better at stimulating LH release:
Effects of estradiol and some antiestrogens (clomiphene, tamoxifen, and hydroxytamoxifen) on luteinizing hormone secretion by rat pituitary cells in culture.
Emons G, Ortmann O, Thiessen S, Knuppen R.
Primary pituitary cell cultures from adult female rats were incubated for 4 or 24 h with various concentrations of estradiol (E2) or the antiestrogens (AE) tamoxifen (TMX), 4-hydroxytamoxifen (OH-TMX), and clomiphene citrate (CC). The luteinizing hormone (LH)-response of these cultures to gonadotrophin releasing hormone (GnRH) was monitored. Treatment for 4 or 24 h with high concentrations (10(-5) M) of the AE significantly decreased the GnRH-induced LH-release by the gonadotrophs. The negative E2-effect, which is observed in this model after 4 h was enhanced and the positive E2-effect, which occurs after 24 h, was completely reversed into a negative effect by these high AE-concentrations. Treatment of pituitary cells with increasing concentrations of E2 (10(-13)-10(-6) M) or AE (10(-12)-10(-5) M) for 24 h led first to a dose dependent increase of the LH-response to 5 X 10(-10) M GnRH. At higher E2- or AE-concentrations this positive effect was lost, resulting in bell shaped dose-response curves. The following maximal effective concentrations (EDmax) were found: E2 = 10(-10) M, OH-TMX = 10(-9) M, CC = 10(-7) M, TMX = 10(-6) M. Incubation of pituitary cells for 24 h with concentrations of AE near their EDmax and stimulation with increasing concentrations (10(-11)-10(-7) M) of GnRH resulted in significant increases of LH-secretion over a wide range of GnRH-concentrations. It is concluded that AE possess marked intrinsic activities on pituitary LH-secretion: at extremely high concentrations they suppress the GnRH-induced release of the gonadotrophin. At lower concentrations they increase the pituitary LH-response to GnRH in a manner which is qualitatively indistinguishable from that of E2.
Comparison of tamoxifen with danazol in the management of idiopathic gynecomastia.
Ting AC, Chow LW, Leung YF.
Department of Surgery, The University of Hong Kong, Queen Mary Hospital, Pokfulam.
Idiopathic gynecomastia, unilateral or bilateral, is a common physical finding in normal men. Successful treatment using tamoxifen (antiestrogen) and danazol (antiandrogen) has recently been reported. We compared the efficacy of tamoxifen and danazol in the treatment of idiopathic gynecomastia. We reviewed the clinical records of patients with idiopathic gynecomastia presenting to the Department of Surgery, University of Hong Kong, between August 1990 and September 1995. Medical treatment with either tamoxifen (20 mg/d) or danazol (400 mg/d) was offered and continued until a static response was achieved. The treatment response was compared. Sixty-eight patients with idiopathic gynecomastia were seen in the Breast Clinic. The median age was 39.5 years (range, 13-82), with a median duration of symptoms of 3 months (range, 1-90). The median size was 3 cm (range, 1-7). Twenty-three patients were treated with tamoxifen and 20 with danazol.
Complete resolution of the gynecomastia was recorded in 18 patients (78.2%) treated with tamoxifen, whereas only 8 patients (40%) in the danazol group had complete resolution. Five patients, all from the tamoxifen group, developed recurrence of breast mass. In conclusion, hormonal manipulation is effective in the treatment of patients with idiopathic gynecomastia. Although the effect is more marked for tamoxifen compared with danazol, the relapse rate is higher for tamoxifen. Further prospective randomized studies would be useful in defining the role of these drugs in the management of patients with idiopathic gynecomastia.
In one study using Clomid for gynecomastia the clomid treated group had less of a rate of recovery, and it took longer to treat. Still, clomid has not proven to be an effective method for treatment while nolvadex has.
"Clomiphene citrate 100 mg daily was used to treat 28 boys with pubertal gynaecomastia. Six failed to complete the course and of the remaining, 14 (64%) responded within 6 months of commencement of therapy. LH, FSH, testosterone and oestradiol levels rose during therapy. It is suggested that clomiphene affects gynaecomastia locally as an anti-oestrogen."
The effect of clomiphene citrate on pubertal gynaecomastia.
LeRoith D, Sobel R, Glick SM.