For anyone who is curious and doesn't feel like looking it up, this product contains calcium, magnesium, and cow spleen.
I really don't know why taking spleen would make your spleen detoxify, specifically.
My instinct would be to stop taking it and talk this over with your LLMD (or even regular MD) to make sure the pain isn't something to worry about
. I am wary of Standard Process because they seem mostly to be extensively-patented products recommended only by chiropractors, plus I don't believe in making ourselves worse if we can avoid it. Let your chiro know that it's causing spleen pain, and if you decide to resume taking it, then maybe start with just one per day.
I know we all want to avoid an ER visit for a spleen ultrasound if we can these days.