GlaxoSmithKline (GSK) originally developed Amoxil, the brand name for amoxicillin, an antibiotic in the penicillin family. However, over time, the patent for Amoxil expired, and it became available as a generic drug produced by many pharmaceutical companies.

While GSK was once associated with Amoxil, it no longer exclusively manufactures or markets the drug under this name. Instead, amoxicillin is now widely available as a generic medication produced by various pharmaceutical companies around the world.