I take 200mg of Pygeum extract daily. No nausea, but less frequent trips to the bathroom at night. (I'm 57 years old) I want to produce more precum, and it has helped only slightly. I was hoping to flow like a faucet like some users have reported, but not even close for me. I have tried 4 different products. The first was Pygeum bark, and the Pygeum bark occasionally caused stomach and digestive issues. With my current extract powder, I have never experienced any negative side effects.