Hello, You have history of hypertension. You want to take testosterone boosters to increase your libido. You are 77 yrs old. Testosterone boosters have a tendency to elevate blood pressure. Since you are already hypertensive and on medicines to control it, it is not recommended to take testosterone boosters as it will cause more harm then good. If blood pressure remains high, the chances of heart attack, heart failure, kidney failure and stroke are increased. Since you are being treated for high blood pressure with the medications, all cardiac complications have decreased significantly. Quit smoking, alcohol or addictions if any. Take a low sodium diet, do regular exercises and loose weight if overweight. Take multivitamin supplements. Take vitamin D and exposure to sun. Minimize stress and take protein diet. Avoid taking refined flour, trans fat, sugars, full fat dairy products. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Nupur K., General & Family Physician