RC stands for research chemical, and sometimes they're called designer drugs. Really it refers to any chemical that isn't well studied and understood, but typically when people talk about RCs they're referring to drugs that aren't federally scheduled, and which fall into a legal grey area in many cases (allowing them to be sold on the open market). A lot of these are analogues of scheduled drugs, for example:
Clonazolam ("CLAM"), an analogue of clonazepam (Klonopin)
parks_canada t1_jegl34r wrote
Reply to comment by coniferous-1 in ELI5: If benzodiazepines are CNS depressants, why is it so hard to die from a overdose of them alone? by psychrolute
RC stands for research chemical, and sometimes they're called designer drugs. Really it refers to any chemical that isn't well studied and understood, but typically when people talk about RCs they're referring to drugs that aren't federally scheduled, and which fall into a legal grey area in many cases (allowing them to be sold on the open market). A lot of these are analogues of scheduled drugs, for example: