@sueinmn
Hi,
Do you know what your vitamin D level is?
I don’t understand why your doctor wants you to take so much vitamin D. That amount is definitely not needed for the absorption of calcium. Are you taking medications that effect/deplete your vitamin D? 4,000IU is considered the daily maximum dose. I’m curious as to why your doctor wants you to take so much? if your vitamin D is extremely low I could understand it. I took 6000IU for some time then 2,000 once my level reached 60. I take three medications that interfere with vitamin D.
Here is a link from the Mayo Clinic regarding vitamin D,
https://www.mayoclinic.org/drugs-supplements-vitamin-d/art-20363792
Best of luck,
Jake