Vitamin D deficiency and taking more

My Endocrinologist has had me taking a prescription strength vit D for many years (50,000 IU 1 X Week) to help with my calcium absorbtion.  But even at that the last time she ran my blood work my vitamin D level was low so she wanted me to more D every day, so I'm taking 1000 IU every day on top of the weekly dose.  I haven't noticed any cramping.  I have nausea as a relatively new symptom of my CD, within the last 2 - 3 years, so I can't really say if it has added to that. But I would be interested to find out if there is a relationship, cause if there is, I'm off the extra vitamin D.  I am so tired of being nauseous.

Nah. No nausea or cramping w/Vitamin D. I was on 100,000 IU weekly for better than 2 years and have been reduced to 50,000 IU weekly now for a year or so by my Endo.

Did they check your parathyroid hormone w/ionized calcium as well as your vitamin D levels when your vitamin D level remained low despite the scripted dose of D?

Vitamin D, PTH and calcium levels can all be interdependent on each other.

And vitamin D is really a hormone. Plus there are two forms of vitamin D to check for. I've forgotten, I think 25 and 25-1. If I remember.