Posted by iHerb Customer on May 03, 2013 | Verified Purchase
Began taking this for ED. I have read elsewhere that Natrol has reformulated this at some point in the last two or three years, and the reformulation made it much more powerful. I took 1 capsule and after about an hour it was very obviously working for me. In fact, it made a huge difference, if you catch my drift... However, the after-affects were significant. Very quickly I broke out into cold sweats. I was shivering and yet sweating quite a bit with a pounding irregular heartbeat. I also was not able to sleep that night at all. I am told that taken daily these side affects become less, but it's hard to imagine taking this daily. Next time I only took half a capsule. Still did the job for me, but side affects were still too severe and I was still up all night. I now divide each capsule into 5 even doses. It still works for me at that dose, although not as well, but still well enough. And the side affects are tolerated. One bottle will last me awhile. The benefit is worth the unpleasant after-affects.