| Y51.0 | Anticholinesterase agents 
 | 
	| Y51.1 | Other parasympathomimetics [cholinergics] 
 | 
	| Y51.2 | Ganglionic blocking drugs, not elsewhere classified 
 | 
	| Y51.3 | Other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics, not elsewhere classified Papaverine
 | 
	| Y51.4 | Predominantly alpha-adrenoreceptor agonists, not elsewhere classified Metaraminol
 | 
	| Y51.5 | Predominantly beta-adrenoreceptor agonists, not elsewhere classified 
 
Excludes:
albuterol ( Y55.6 )
 | 
	| Y51.6 | Alpha-adrenoreceptor antagonists, not elsewhere classified 
 
Excludes:
ergot alkaloids ( Y55.0 )
 | 
	| Y51.7 | Beta-adrenoreceptor antagonists, not elsewhere classified 
 | 
	| Y51.8 | Centrally acting and adrenergic-neuron-blocking agents, not elsewhere classified 
 
Excludes:
clonidine ( Y52.5 ) 
guanethidine ( Y52.5 ) 
 | 
	| Y51.9 | Other and unspecified drugs primarily affecting the autonomic nervous system Drugs stimulating both alpha- and beta-adrenoreceptors
 |