[Dynseli]

For reference only: tamoxifen, bromocryptine, testosterone, dydrogesterone, hydrocortisone, diuretics and medroxy progesterone acetate have been used as alternatives to to surgery to treat gestational hypertrophy and have worked. In a review, raloxifene and tamoxifen treated high percentages of serious cases of pubertal and adult gynecomastia in various studies. Most cases of gynecomastia didn't require surgical treatment.

Other medications include Raloxifene, and Danazol.

Some of the mentioned drugs are selective estrogen receptor modulators. Tamoxifen has had some success in the treatment of cancer.

References:
*Selective estrogen receptor modulators and phytoestrogens https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2587438/
* Gestational gigantomastia with complete resolution in a Nigerian woman https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3062818/
* Gynecomastia http://www.aafp.org/afp/2012/0401/p716.html
* Reduction of Breast Density Following Tamoxifen Treatment Evaluated by 3-D MRI https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3005955/
* Sucessful treatment of D-penicillamine-induced breast gigantism with danzanol http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1504185/?page=2

See also:
* Biology of the breast http://www.breastnexus.com/showthread.php?tid=21572
* Hormones and fertility (ovaries, FSH, mint, clover, ZEN, etc) http://www.breastnexus.com/showthread.php?tid=20978