S.C. Code Ann. § 44-53-375
(B) A person who manufactures, distributes, dispenses, delivers, purchases, or otherwise aids, abets, attempts, or conspires to manufacture, distribute, dispense, deliver, or purchase, or possesses with intent to distribute, dispense, or deliver methamphetamine or cocaine base, in violation of the provisions of Section 44-53-370, is guilty of a felony and, upon conviction:
(3) for a third or subsequent offense or if the offender has been convicted two or more times in the aggregate of any violation of the laws of the United States or of any state, territory, or district relating to narcotic drugs, marijuana, depressant, stimulant, or hallucinogenic drugs, the offender must be imprisoned for not less than fifteen years nor more than thirty years, or fined not more than fifty thousand dollars, or both.
Possession of one or more grams of methamphetamine or cocaine base is prima facie evidence of a violation of this subsection.
(C) A person who knowingly sells, manufactures, delivers, purchases, or brings into this State, or who provides financial assistance or otherwise aids, abets, attempts, or conspires to sell, manufacture, deliver, purchase, or bring into this State, or who is knowingly in actual or constructive possession or who knowingly attempts to become in actual or constructive possession of ten grams or more of methamphetamine or cocaine base, as defined and otherwise limited in Section 44-53-110, 44-53-210(d)(1), or 44-53-210(d)(2), is guilty of a felony which is known as "trafficking in methamphetamine or cocaine base" and, upon conviction, must be punished as follows if the quantity involved is:
(1) ten grams or more, but less than twenty-eight grams:
(2) twenty-eight grams or more, but less than one hundred grams:
(E)
(1) It is unlawful for any person, other than a manufacturer, practitioner, dispenser, distributor, or retailer to knowingly possess any product that contains twelve grams or more of ephedrine, pseudoephedrine, or phenylpropanolamine, their salts, isomers, or salts of isomers, or a combination of any of these substances. A person who violates this subsection is guilty of a felony and, upon conviction, must be punished as follows if the quantity involved is:
(a) twelve grams or more, but less than twenty-eight grams:
(b) twenty-eight grams or more, but less than one hundred grams:
(2) This subsection does not apply to:
(a) a consumer who possesses products: