Hello everyone.
Firstly, let me say that I feel sorry for your loss, Colm.
I would like to add something about Colm´s experiences with niacin. This is my own experience.
If I take niacin(whether experiencing the flush or not), but I do not have an orgasm; then I will suffer a mild-Pois version(symptoms which resemble POIS, very cold hands. lower physical and mental energy, It´s like a 20% POIS) that lasts for some days. In that case, I´ll always feel the effects 3 hours, 3 1/2 hours after taking niacin.
If I take my usual amount of niacin(200-250mg), but I don´t experience the flush; then I will suffer again a mild-POIS after orgasm.
And this is something that I realized some time ago: Sometimes if I take niacin and get the flush; I can experience a mild POIS - ONLY IF i had sexual intercourse. This doesn´t happen always, but right now what I am doing is to have a second "self-inflicted"(masturbation) orgasm after intercourse just to eliminate the possibility . This will clear my symptoms away.
And if I masturbate after taking niacin(and having the flush), I´ll be ok.
So I reached the conclusion that niacin is some kind of double edge sword. My advice is to use it ONLY IF you are 100% sure that you are going to orgasm after having a flush.