title: Letter Required legend for controlled drugs.
mesh_terms: D004074:Digitoxin / Q000008:administration & dosage*; D004077:Digoxin / Q000008:administration & dosage*; D010602:Pharmacopoeias as Topic; D013607:Tablets; D014481:United States
chemical_list: D013607:Tablets; D004077:Digoxin; D004074:Digitoxin