Pharmacology General 50c8e033 Fk-506 is a - A It is a macrolide antibiotic B Immunoglobulin antibody C Non depolarising muscle relaxant D Opioid analgesic High-Yield Explanation Ans. is 'a' i.e., It is a macrolide antibiotic o Fk-506 is commonly known as Tacrolimus. o Tacrolimus is a macrolide antibiotic produced by streptomyces tsukubaensis.