Pharmacology of Sympathomimetics

Part of the autonomic nervous system that prepares the body for "fight-or-flight" responses.

Part of the autonomic nervous system that promotes "rest-and-digest" functions.

Chemical messenger that transmits signals between neurons or from neurons to other cells.

Receptors that bind to norepinephrine and epinephrine.

Receptors that bind to acetylcholine.

A hormone and neurotransmitter that triggers the fight-or-flight response.

Drugs that mimic the actions of epinephrine or norepinephrine.

Drugs that block the effects of epinephrine or norepinephrine.

Group of neurotransmitters and hormones with similar chemical structures including norepinephrine, epinephrine & dopamine

Neurotransmitters and hormones that are not catecholamines.

Type of adrenergic receptor that cause vasoconstriction in certain blood vessels.

Type of adrenergic receptor that is found in the heart and increases cardiac output.

Type of adrenergic receptor that causes vasodilation in skeletal muscle blood vessles.

Leads to vasodilation (widening of blood vessels) and a decrease in diastolic blood pressure.

Drugs that primarily activate beta-2 adrenergic receptors.

Short-acting beta-2 agonists used for asthma and preterm labour.

Causes bronchodilation (opening of airways) in the lungs.

Long-acting beta-2 agonists for maintenance asthma treatment.

Inhibits the tone and movement of the gastrointestinal tract and contracts sphincters.

Beta-2 agonist used to stop premature labor.

Relaxes the bladder wall and contracts the sphincter to prevent involuntary urination.

Drugs with both direct and indirect effects on the sympathetic nervous system.

Causes relaxation of the uterus. Important during pregnancy.

Acts as a physiological antidote to histamine; useful in managing allergic reactions.

A plant-based or synthetic sympathomimetic with both direct and indirect actions.

A stimulant that mainly affects the central nervous system, resulting in increased alertness and decreased appetite.

Contracts sphincters in the gastrointestinal tract.

Causes vasoconstriction, especially in skin and mucous membrane, increasing peripheral resistance and blood pressure.

Unwanted side effects like tachycardia, palpitations, anxiety, and tremors.

Increases heart contractility but reflex vagal stimulation slows heart rate due to increased blood pressure.

Causes vasodilation in skeletal muscle and coronary blood vessels; lowers diastolic blood pressure.

Promotes bronchodilation, important for treating bronchial asthma.

Increases heart contractility, with minimal impact on heart rate. A selective β1 agonist.