Wait are u talking about l-argininge or the blue pill??
By the blue pill I was referring to Viagra. But doesn't matter.
And regarding l-arginine - its an amino-acid as I remember from the course of chemistry and it is said to improve libido and erection.
My friend uses it sometimes a half an hour before sex 2-3 pills of 100mg. And he said it does help keep things going quite well.))) He has suggested me to try it but I haven't still. Maybe I will now.))
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