adrenergic blocking agent
adrenergic blocking drug

Orthostatic hypotension can also be a side effect of alpha adrenergic blocking agents.

Guanadrel is a postganglionic adrenergic blocking agent.

Beta-blockers (e.g. metoprolol) or combined alpha and beta adrenergic blocking agents (e.g. labetalol) should be avoided in patients with a history of cocaine abuse.

It is suggested that this terminology be extended to the realm of adrenergic blocking drugs, e.g., that blocking drugs be designated according to the receptor for which they have the greatest affinity, as either alpha or beta adrenergic blocking drugs."