'Terramycin' carton, 1956-1957.
© Science Museum / Science & Society Picture Library
Made by Pfizer of Folkestone, Kent. 'Terramycin' is a brand name for the antibiotic oxytetracycline. Oxytetracycline acts by interfering with a microorganism's ability to produce certain vital proteins; thus it is an inhibitor of growth rather than a killer of the infectious agent and is only effective against multiplying microorganisms. It can be used against a variety of infectious diseases as well as respiratory and urinary tract infections.