Can any doc explain if vitamin d pills make you pee more?

Indirectly yes. Vitamin D does not act directly on kidneys to produce more urine. However it tends to increase calcium levels in the body. High levels of calcium can sometimes cause polyuria. This is an increase in number of times subject needs to urinate.

Related Questions

Blood calcium's been high & normal, Vitamin D low, PTH-40.TSH 1.2 & 2.5.My urine calcium 625. Doc thinks I tampered w/it. Far from true. What is going on?

Second opinion. You do not say what the Ca level was. Your PTH is normal. If your doctor finds you untrustworthy then perhaps you have done something to precipitate their suspicion, in which case finding another doctor and being re-evaluated is the best option. Good luck. Read more...
I suspect... High urine calcium is from primary Hyperparathyroidism. I don't know your calcium but your PTH should be lower than 40 if your calcium is high. I would consider an evaluation by an endocrinologist with Hyperparathyroidism experience. Read more...