Some people react to too much caffeine and wrong allegy meds. I would get off caffeine totally - don't even eat chocolate - and some people changed meds.
I have read that cayenne is good to dilate blood vessels at a heart attack, celery seed tea is said to be good for the heart. Losing weight is paramount of importance to bring the blood vessels into better condition since the fat not only sits on the belly after awhile it also lines blood vessels until they close.
Caffeine of any sort would constrict blood vessels making heart attacks all the more likely.
In addition the government as I understand it has to monitor the chocolate to keep the level of rat dung and insect parts lower. I would lower animal products or even eliminate them. I would use plenty of raw fruits and vegetables in addition to some cooked ones. I would keep the body weight to a proper level according to charts if possible. I would walk daily. I would keep a proper amount of water in the body. 50 ounces for every 100 pounds body weight.
I would do a daily short brisk walk outside in the sun when it is not bad weather even in winter after meals. I would try to keep a schedule. I would avoid vinegars, drugs, alcohol, tobacco, food additives and even outside lotions since these often contain things that absorb into the skin within 27 seconds.
I would try to get 8 hours sleep with a proper bedtime each night. Peace