Question

What beta receptors do these sympathomimetic drugs stimulate?

Answer 1

Sympathomimetics stimulate alpha-1 adrenergic receptors, beta-adrenergic receptors, and dopamine (D) receptors in various target tissues, such as the eyes, heart, and vascular smooth muscle.
Sympathomimetic drugs mimic the effects of sympathetic activation on the heart and circulation. Like the sympathetic nerves innervating the heart, sympathomimetics stimulate the heart through activation of beta-adrenoceptors, and sympathomimetics cause vascular smooth muscle contraction and vasoconstriction through activation of alpha-adrenoceptors.

Included in the list of sympathomimetic drugs are beta-adrenoceptor agonists and alpha-adrenoceptor agonists. Some sympathomimetics stimulate the release of norepinephrine from sympathetic nerves in addition to their receptor agonist activities.