Conclusion: Oral vitamin D 3 has no significant effect on blood pressure in people with vitamin D deficiency. It reduces systolic blood pressure in people with vitamin D deficiency that was older than 50 years old or obese. Does D3 have any side effects? Too much vitamin D can cause harmful high calcium levels. Vitamin B12. A total of 15 drugs are known to interact with Vitamin B12 . Vitamin b12 is in the drug class vitamins . Vitamin b12 is used to treat the following conditions: B12 Nutritional Deficiency. Pernicious Anemia. Schilling Test. Vitamin B12 Deficiency. 5f24nH.

can i take vitamin c d3 and b12 together