| Y52.0 | Cardiac-stimulant glycosides and drugs of similar action 
 | 
	| Y52.1 | Calcium-channel blockers 
 | 
	| Y52.2 | Other antidysrhythmic drugs, not elsewhere classified 
 
Excludes:
beta-adrenoreceptor antagonists ( Y51.7 )
 | 
	| Y52.3 | Coronary vasodilators, not elsewhere classified Dipyridamole
 
Excludes:
beta-adrenoreceptor antagonists ( Y51.7 ) 
calcium-channel blockers ( Y52.1 )
 | 
	| Y52.4 | Angiotensin-converting-enzyme inhibitors 
 | 
	| Y52.5 | Other antihypertensive drugs, not elsewhere classified Clonidine
 Guanethidine
 Rauwolfia
 
 
Excludes:
beta-adrenoreceptor antagonists ( Y51.7 ) 
calcium-channel blockers ( Y52.1 ) 
diuretics ( Y54.0-Y54.5 )
 | 
	| Y52.6 | Antihyperlipidaemic and antiarteriosclerotic drugs 
 | 
	| Y52.7 | Peripheral vasodilators Nicotinic acid (derivatives)
 
Excludes:
papaverine ( Y51.3 )
 | 
	| Y52.8 | Antivaricose drugs, including sclerosing agents 
 | 
	| Y52.9 | Other and unspecified agents primarily affecting the cardiovascular system 
 |