I found this forum a few months ago and learned that Niacin could make things better for my POIS. So I tried it. And it worked. I was almost 90% POIS-free when I used to take Niacin priori to ejaculation. Now I am noticing that its effect is decreasing. I do everything the same way. Take Niacin on an empty stomach, wait for flush to peak, and then go at it and after ejaculation, I used to feel about 90% POIS-free. By next day, no POIS at all. Before I found out that Niacin helps, my POIS used to last for days (3-4 days). Now, I am noticing that Niacin isn't working as good as it used to and I think soon it will stop working altogether. Before it worked 90% and now it's working around 40% I guess.
Why is this and what can I do about it?
My POIS is only extreme weakness after ejaculation and lasts for 3-4 days. Makes it VERY hard for me to do daily routine stuff for the first two days. I prefer lying in the bed all the time because of the weakness. Sometimes there is pain in legs for a little while only.