Depression, brain fog and lethargy. They're symptoms of a condition that is similar to menopause in women, but in men, it's called andropause, or testosterone deficiency syndrome.

For women, there is often a sudden drop in certain hormone levels in middle age. For men, however, the change happens gradually over years, says Dr. Dean Elterman, assistant professor in the University of Toronto's division of urology.

By the time men who are affected do notice a change — in mood or sex drive — the symptoms can be "really quite significant," affecting men in the prime of their life, Elterman says. 

He talked to CBC Radio's Metro Morning's guest host Nil Köksal about why it's difficult for men to talk about what has been nickednamed "manopause" and why they should see a doctor.

Click on the audio link to hear the interview.