| Y53.0 | Histamine H 2 -receptor antagonists 
 | 
	| Y53.1 | Other antacids and anti-gastric-secretion drugs 
 | 
	| Y53.2 | Stimulant laxatives 
 | 
	| Y53.3 | Saline and osmotic laxatives 
 | 
	| Y53.4 | Other laxatives Intestinal atonia drugs
 | 
	| Y53.5 | Digestants 
 | 
	| Y53.6 | Antidiarrhoeal drugs 
 
Excludes:
systemic antibiotics and other anti-infectives ( Y40-Y41 )
 | 
	| Y53.7 | Emetics 
 | 
	| Y53.8 | Other agents primarily affecting the gastrointestinal system 
 | 
	| Y53.9 | Agent primarily affecting the gastrointestinal system, unspecified 
 |