Modification of rates of gastrointestinal absorption of drugs. II. Quaternary ammonium salts.
D064751:Ammonium Compounds; D065569:Gastrointestinal Absorption; D041981:Gastrointestinal Tract / Q000502:physiology*; D007408:Intestinal Absorption; D000644:Quaternary Ammonium Compounds; D012492:Salts
D064751:Ammonium Compounds; D000644:Quaternary Ammonium Compounds; D012492:Salts
AMMONIUM COMPOUNDS; GASTROINTESTINAL SYSTEM/physiology