Beta-adrenergic blocking agents
and dental vasoconstrictos.
Since, these substances may trigger vasospasm; beta-adrenergic blocking agents
should be avoided in such cases.
All of these therapies--angiotensin-converting enzyme inhibitors or angiotensin II receptor blockers, beta-adrenergic blocking agents
(betablockers), aldosterone antagonists, hydralazine/ isosorbide dinitrate, implantable cardioverter defibrillators, and cardiac resynchronization therapy--are effective in treating heart failure, with the benefits outweighing the risks.
Because of the potential effects of beta-adrenergic blocking agents
on blood pressure and pulse, these agents should be used with caution in patients with cerebrovascular insufficiency.
"Beta-Adrenergic Blocking Agents
(Ophthalmic)." Medlineplus Health Information, National Library of Medicine.