Is melatonin 5mg time released safe for diabetics and cardio patients...i have 2 stents in lad?

It is: Appropriate doses of melatonin are generally safe in diabetes and heart disease. It does slightly reduce clotting ability so is used with caution when on another blood thinner, and one should always notify prescribing doctors when considering a new OTC med/supplement. 3mg taken 4 hours before bed is the most effective studied dose of melatonin, and timed-release forms offer no additional benefit