First, it is important to understand the purpose of hCG and understand its effects on the human body.  hCG is a naturally occurring hormone produced in the placenta of women during pregnancy and produced synthetically for the use of fertility treatments. It is important in triggering hormonal changes in women during pregnancy, embryo development and it can increase the production of natural male and female steroids (sex hormones).

Positive side effects

Fox News Report on hCG reducing chances of breast cancer

hCG combined with medications

Taking hCG while using other medications?  Try these drug interaction tools-

http://www.medscape.com/druginfo/druginterchecker?src=GWL

"I didn't feel much different than usual.  I had a very mild lower backache for the first few days, which my Dr. attributed to the hormone shift.  I wasn't worried because I get this just before my period too.   

Interestingly enough, I did not have migraines, which I had been having periodically for the previous year; my Dr. had attributed these to my weight gain after my daughter was born and my blood pressure was very high.  Which, incidentally, was the reason he suggested the hCG diet.  My biggest side effect was, believe it or not, was the loss of sex drive.  Completely unexpected.  I had never had an issue in this area but my Dr. sent me on my way with "Viagra for women" and that took care of it.  I have now lost over 40 lbs in well under 2 months.  I will be starting my final cycle of hCG (and my Viagra for women! lol) next week and hope to reach my goal weight in the next month."  Read the article:

Interesting Article on Viagra for Women