I ran out of prescription so I am going to go awhile before refilling it and see what happens.
Relevant items include going from 4000IU of Vitamin D tablets to 5000IU of gelcaps a day. Its more and I am told that gelcaps lead to more reliable absorption. I am pretty good about taking the tablets after food so in theory only the increase in IU's will change.
Also, magnesium apparently can affect blood pressure so we shall see.
I am still taking Vitamin C.