benign prostatic hyperplasia
"I am 68 and have been using Avodart and Tamusolin together now for about a month.  A serious side effect suffered is extreme difficulty obtaining an erection and/or ejaculation.  A minor side effect has been light-headedness.  At my age the serious side effect does not really bother me but being light-headed is a concern in my employment as a transit driver.  I believe the Tamusolin is the light-headedness culprit but my doctor does not want me to continue it much longer."