I am moderately sore in my right arm from a tetanus booster shot. Got a flu shot in the other arm, but it’s fine. Had blood drawn and the numbers were better this time than last, I think, though the doctor may not have reviewed them herself. I’m still of the opinion that it was the small niacin doses I was accidentally taking that were responsible for the signs of screwed up liver and kidney; the stuff is poisonous to me, for whatever reason.
I can take niacinamide supplements, just not niacin proper (nicotinic acid) or flush-free niacin (inositol hexanicotinate).