Drug-induced esophagitis.
D004205:Cromolyn Sodium / Q000009:adverse effects; D004318:Doxycycline / Q000009:adverse effects; D004941:Esophagitis / Q000139:chemically induced*; D006801:Humans; D013806:Theophylline / Q000009:adverse effects; D013997:Time Factors
D013806:Theophylline; D004318:Doxycycline; D004205:Cromolyn Sodium