Simple possession of LSD (50 micrograms or less) is a misdemeanor punishable by up to 2 years in jail and $5,000 in fines.  A second offense is a felony punishable by up to 5 years in prison and $5,000 in fines.  A third or subsequent offense is punishable by up to 5 years in prison and $10,000 in fines. 

If someone were to possess more than 50 micrograms of LSD, that would be manufacturing, distributing or possession with intent to distribute which is a felony offense punishable by up to 15 years in prison and a $5,000 fine.  A second offense carries a penalty of 5 to 30 years in prison and up to $50,000 in fines.  A third or subsequent offense is punishable by 15 to 30 years in prison and up to $50,000 in fines. 

S.C. Code Section 44-53-370(d)(1).