What are the different types of hormone therapy?

There are several types of hormone therapy, including the following:
orchiectomy - the surgical removal of the testicles to prevent the male hormones that stimulate growth of the prostate cancer from being produced.
LHRH (luteinizing hormone-releasing hormone) analogs - drugs that decrease the amount of testosterone produced in a man's body by interfering with the normal chemical signals sent from the pituitary gland in the brain to the testicles. Drugs include Lupron®, Viadur®, Eligard®, Zoladex®, and TrelstarTM.
anti-androgens - substances that block the body's ability to use testosterone, because even after orchiectomy or LHRH-analog treatment, a small amount of testosterone may still be produced in the body. Other hormonal drugs may be used for periods of time during treatment. Drugs include Eulexin®, Casodex®, and NilandronTM.
LHRH antagonist (Plexaxis) - used on a very limited basis due to serious allergic reactions by some persons. Given by injection.

read more at http://www.healthsystem.virginia.edu/UVAHealth/adult_prostate/phormon.cfm