title: Gynecomastia and histamine-2 antagonists.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D006177:Gynecomastia / Q000139:chemically induced*; D006635:Histamine H2 Antagonists / Q000009:adverse effects*; D006801:Humans; D008297:Male
chemical_list: D006635:Histamine H2 Antagonists