BP 145/75. Want to avoid drugs. Potassium levels top end of normal. Magnesium 0.85 a bit low. Could low dose magnesium ie 350 or less help and be safe?

Here are some... I would not get excited or panic at seeing a set of slight deviating lab report as reported here. Always correlate the reports to clinical profile and to serial changes in lab over time. So, likely you be okay continue current drugs but be followed by your doctor. Apparently, you are on multiple drugs; for safer use of multiple drugs, go to https://ebettercare.com/wellness-newsletter-3/. Best....