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Interactions With Medications. Even though vitamin B-12 is safe if you take too much, it can interact negatively with certain medications. Chloramphenicol, a type of antibiotic, affects how your body responds to B-12.Even though you're taking a large dose of B-12, the medication limits the vitamin's function.ost vitamins and minerals can be toxic if you take too much. However, vitamin B-12 is a little different. Your system only absorbs a small amount at a time and gets rid of what it doesn't need, which means it's generally safe, even if you take too much.
No supplement or mineral or vitamin is not healthy if you take it too much. This is the same case with vitamin D. When you take too much vitamin in your body you can get hypervitaminosis. Hypervitaminosis D is condition when you take too much vitamin D, and this can potentially become serious condition.ou can get problems with vitamin D from too much exposure to the sun. I hope this helped. Reply. Loading... joyce stout. cindee wrote: I know that deficiency of vitamin D may cause many problems in your body, but I didnât know that too much vitamin D also can do you harm.