PCRI's Alex and medical oncologist Mark Scholz, MD, describe the ins and outs of testosterone, especially as it concerns men with prostate cancer concerns.

0:06 How are testosterone levels measured? When is testosterone monitoring relevant in the context of prostate cancer?

1:44 What is the normal range of testosterone for a 40-year-old man? How much and how often do testosterone levels fluctuate?

3:08 Considering that testosterone can fluctuate throughout the day, and from day to day, what is the best way to measure it?

5:44 What do "free testosterone" and "overall testosterone" mean?

9:00 What is the difference between "potency" and "libido" in this context? How can testosterone influence either one?

10:17 How do drugs like Viagra and Cialis help improve men's potency?

10:38 How often and with whom (i.e. which type of physician) should a man check testosterone levels?

11:51 Is it ever unsafe for a man to use testosterone replacement therapy?

14:58 What kind of doctor should a patient see if they are interested in testosterone replacement therapy?

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