H2 receptor antagonists-cimetidine and ranitidine.
D000897:Anti-Ulcer Agents / Q000009:adverse effects*; D002927:Cimetidine / Q000009:adverse effects*; D005663:Furans / Q000009:adverse effects*; D006146:Guanidines / Q000009:adverse effects*; D006801:Humans; D011899:Ranitidine
D000897:Anti-Ulcer Agents; D005663:Furans; D006146:Guanidines; D002927:Cimetidine; D011899:Ranitidine