Patients are often able to refill product recommendations made by Northeast Natural Medicine, LLC online. DO NOT SUBSTITUTE another formula as a refill for those prescribed. Other brands will most likely not contain the same ratio, type or potency of other ingredients that we require for results. The use of other formulas may decrease and delay the results you are seeking. In addition you run the risk of over or under-dosing or taking combinations of substances that may be harmful to your health.