Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.
Before taking this medicine
You should not use ascorbic acid if you have ever had an allergic reaction to a vitamin C supplement.
Ask a doctor or pharmacist about using ascorbic acid if you have:
kidney disease or a history of kidney stones;
hereditary iron overload disorder (hematochromatosis); or
if you smoke (smoking can make ascorbic acid less effective).
Your dose needs may be different during pregnancy or while you are breast-feeding a baby. Do not use ascorbic acid without your doctor's advice in either case.
