Many women, in fact, prefer a 'natural', or non-hormonal approach. This means they may turn to widely advertised dietary supplements or herbs; in fact, many of the effective ones contain a form of estrogen derived from plants - these are known as phytestrogens.

Entirely non-hormonal approaches to the treatment of hot flashes include vitamin E, a blood pressure lowering drug - clonidine, another, older, blood pressure drug - methyldopa, and derivatives of the belladonna plant.

Sometimes antidepressant drugs are used, especially the newer SRI (serotonin reuptake inhibitor) agents, such as Prozac. Now a report has been published of the effectiveness of a new antidepressant drug, venlafaxine, in treating hot flashes.
http://www.healthandage.com/Home/gm=20!gid2=1092

Although more definitive research is necessary, several natural therapies show promise in treating hot flashes without the risks associated with conventional therapies. Soy and other phytoestrogens, black cohosh, evening primrose oil, vitamin E, the bioflavonoid hesperidin with vitamin C, ferulic acid, acupuncture treatment, and regular aerobic exercise have been shown effective in treating hot flashes in menopausal women.
For more information on alternative therapies try this link too
http://www.findarticles.com/p/articles/mi_m0FDN/is_3_8/ai_107835436

Please get back to me if there are any more queries. Do remember to accept the answer if you find it useful. A positive rating and a bonus at your discretion would be appreciated.

Regards

Dr. Gupta