Lately I have a decreased libido and cannot keep erection?

Decrease erection. The decline in serum testosterone level occur gradually throughout men's mature life and it may present as a constellation of signs and symptoms of hypogonadism known as "andropause". Late-onset hypogonadism or androgen deficiency syndrome (ads) is a "syndromic" disorder including both a persistent low testosterone serum concentration. This is easily treatable after evaluation to select treatment.