For all of you that are taking vitamin D3 and aspirin, they are not neutral. That is, it can be some danger.
The aspirin is contraindicated in people with kidney disease (chronic kidney disease); the same with many elements as potasium, calcium, phosphorum, etc. Why? Because the kidney can't eliminate the excess of those elements and they accumulate in the blood (with great danger for health). I speak by experience. The same things occurs with an ingest of more than 60-70 grs. of proteins by day.
And regarding Vitamin D3, it can be toxic:
https://en.wikipedia.org/wiki/Vitamin_D#Excess
The wiki article is not complete and I couln't find another in english language (I'm a spanish-speaken and the pages I consult they're in spanish) but be carefull with Vit D3. A "good" dosis could be only 2ml by THREE MONTHS.
And my advice is, before taking any dietary supplements, check your kidneys to control all is ok with them.