I believe you have to be careful when taking supplements with prescription medicine.
I was taken off calcium as they have discovered it can lead to heart problems under certain conditions.
I was once married to a chemist who said all the vitamins were "rubbish"! However this was many years ago.
I tend to buy natural ones when I do buy them and take joint supplements and vitamin B and sometimes in winter vitamin D.
I do think you need to be careful and discuss them with your doctor.