Hi Boolay

It could be caused by some ingredient other than Vitamin D in the tablets. Your GP would know if this is likely and change the Brand for another with different formulation.

It could also be caused by whatever condition you have.

I daily take high dose vitamin D3 5000UI with no ill effects.

Ed

Thanks it was a 24hr thing,seems to have passed.i have changed times of taking tablets to 

Thanks it was a 24hr thing,seems to have passed.i have changed times of taking tablets to