This lecture provides an in-depth overview of adrenergic drugs, which affect the sympathetic nervous system by interacting with adrenergic receptors. Students will learn how norepinephrine, epinephrine, and related drugs influence target organs by binding to alpha (α1, α2) and beta (β1, β2, β3) adrenergic receptors.

The lecture covers the classification, mechanisms of action, pharmacological effects, and clinical uses of adrenergic agonists and antagonists. It also addresses side effects, contraindications, and the importance of receptor selectivity in therapeutic outcomes.