This group comprises preparations with mainly sedative or hypnotic actions.
Melatonin receptor agonists are also classified in this group.
N05A - Antipsychotics
N05B - Anxiolytics
R06A - Antihistamines for systemic use
Combined preparations are classified at separate 4th levels, N05CB and N05CX.
Regarding classification of combined preparations, see comments under N05B - Anxiolytics.
Combined preparations with barbiturates are mainly classified in A03 (mainly antispasmodic effect) or in N02 (mainly analgesic effect).
Combined preparations with barbiturates which remain in N05C are mainly "neurostabilizers".
The group is subdivided according to chemical structure.