When I have regularly taken Horny Goat Weed, I have noticed a increase in libido. As a matter of fact I am not taking it right now, and I have noticed the decrease. I've taken it not because I was just worried about sides, but also because I don't get a lot of exercise and don't get enough sleep with a busy company and two kids under the age of 2. Give it 3 weeks or so, and then you will notice an increase.