You ask a number of questions that I am unable to answer without performing a complete history and physical examination. Your husband has chronic kidney disease (CKD) and his diabetes, heart disease, high blood pressure and peripheral vascular disease make his treatment very complicated.
Sodium bicarbonate is used to treat acid levels in the blood. It is not used to treat sodium levels in the blood. The acid levels are reflected in the amount of carbon dioxide (CO2) that is found in the blood. If the CO2 is less than 22 milliequivalents per liter (mEq/L), the baking soda powder or tablets are administered. The goal is to keep the CO2 greater than 21.
I recommend that you discuss your concerns with your husband’s physician and nephrologist.