Professor Karman
Member
I am assuming you have had back pumps before and the sensations you are having on MK-677 are not similar??Yes, I will not take the MK-677 anymore. At least not this brand.
I have thought what organs there are in that area (left-middle back, more towards the side than to spine): left kidney, spleen and the large intestine. I suspect the last one is what is painful.