A<unk>  is a medication which inhibits the functioning of the sympathetic nervous system (SNS). They are used as antihypertensives.
They mainly comprise antiadrenergic agents, but also anticholinergics in the case of the nicotinic antagonist, since nicotinic receptors relay the signals of the SNS across the ganglia.
Sympatholytic
Nootropic
Anticholinergic
Diuretic
Antithrombotic
Anticoagulant
Anorectic
Sedative