S.C. Code Ann. § 39-24-30
Substitution of equivalent drug product authorized; substitution of interchangeable biological product authorized.
(A) As provided in Section 39-24-40, upon receiving a prescription for a brand name product, a registered pharmacist may substitute a drug product of the same dosage form and strength which, in his professional judgment, is a therapeutically equivalent drug product. (B) As provided in Section 39-24-40, upon receiving a prescription for a specific biological product, a registered pharmacist may substitute an interchangeable biological product. Effect of Amendment 2017 Act No. 11, SECTION 2, inserted paragraph designator (A), and added (B), relating to the substitution of interchangeable biological products.