antiadrenergic

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Of or relating to an agent that annuls or antagonizes the effects of the sympathetic nervous system.

1. sympatholytic: opposing the effects of impulses conveyed by adrenergic postganglionic fibers of the sympathetic nervous system.
2. an antiadrenergic agent.

• a. drugs — include adrenergic blocking agents, both alpha- and beta-blockers, and adrenergic neuron-blocking drugs and catecholamine depleting agents.