Welcome,
I understand your concern. As far as interactions go, there are none per se. However, your vitamin D intake may be on the high side depending on which organization you talk to. Some say 600 IU is enough, the vitamin D council says 5000 IU is recommended while the Endocrine Society advises 2000 IU.
Vitamin D enhances calcium absorption and too much calcium can cause
atherosclerosis. You may get your essential fatty acids by using vegetarian EPA and
DHA without all the vitamin D if you choose. I do not see you having a calcium overload unless you drink a lot of dairy or take
calcium supplements too, which I discourage. Your daily need for calcium is about 1000 mg/day.
Now on to
lisinopril. My food/nutrient handbook recommends a low sodium, low calorie (if needed) may be advised by doctor. Do not use salt substitutes. Do not take at the same time as iron,
magnesium. Avoid natural licorice.
In summary, please do not worry about calcium overload as long as you are not taking calcium supplements. There are some nutritional interactions to consider when taking lisinopril. Remain well hydrated on lisinopril. Continue with getting your omega 3 fatty acids from fish or algae as they are essential daily. I have given you the differing recommendations for vitamin D and its controversial nature. I think you can control any concerns by manipulating the supplements you take, otherwise I have found no reliable evidence that your D intake is too high.
I hope I have addressed your concerns. Sincerely, Kathy Shattler, MS,RDN