| Y55.0 | Oxytocic drugs Ergot alkaloids
 
Excludes:
estrogens, progestogens and antagonists ( Y42.5-Y42.6 )
 | 
	| Y55.1 | Skeletal muscle relaxants [neuromuscular blocking agents] 
 
Excludes:
antispasticity drugs ( Y46.8 )
 | 
	| Y55.2 | Other and unspecified agents primarily acting on muscles 
 | 
	| Y55.3 | Antitussives 
 | 
	| Y55.4 | Expectorants 
 | 
	| Y55.5 | Anti-common-cold drugs 
 | 
	| Y55.6 | Antiasthmatics, not elsewhere classified Aminophylline
 Salbutamol
 Theobromine
 Theophylline
 
 
Excludes:
beta-adrenoreceptor agonists ( Y51.5 ) 
anterior pituitary [adenohypophyseal] hormones ( Y42.8 )
 | 
	| Y55.7 | Other and unspecified agents primarily acting on the respiratory system 
 |