Hot beverages symptoms and conditions

I was on simcor, which is heavy dose of niacin plus simvastatin.Was taking simvastatin alon and i was fine.
my lipids and trygllicerides were very high so put me on this medication''
I'm sure its the niacin that is the culprit. sever itching on back and inner arms.

Was very red and hot to the touch.

I am now off of it for a week. Continue to have the itching and rash.
It has to be a reaction to the niacin, as that is when it started, I refuse to live with this, Will not take again.