I have read somewhere that a injection of a testostarone blocking
hormone, such as Luppron or Eligard, to fight prostate cancer, can
cause heart problems. Does anybody know what kind of heart problems
this can cause and/or where I can find more information?

Hi Vaac,

These drugs do have possible side effects on the cardiovascular
system, including angina, stroke, and heart attack.  Here are some
websites that discuss the drugs and their side effects:

NOTE: Lupron and Eligard are both brand names for Leuprolide.

Healthdigest.org
http://www.healthdigest.org/drugs/leuprolideacetate.html
"CV: Peripheral edema, angina, cardiac arrhythmias, TIA/stroke
hypotension, vasodilation; MI, pulmonary emboli"

RxList
http://www.rxlist.com/cgi/generic/eligard_ad.htm

MedMaster
http://www.nlm.nih.gov/medlineplus/druginfo/medmaster/a685040.html
rapid heartbeat 
chest pain 

USPDI Advice for the Patient
http://www.nlm.nih.gov/medlineplus/druginfo/uspdi/202322.html

I found these sites by first doing a search of Google for "leuprolide
side effects" and by looking in the two public drug guides that are
part of Medlineplus (www.medlineplus.gov) under leuprolide.  Good
luck, and please let me know if you need further assistance!

Librariankt

Thanks, Librariankt, for the very useful references, which will be
useful not only for this but for many other medical problems.