Agonists and Antagonists Flashcards
What is an agonist?
A drug that stimulates a later event when bound to the target receptor
What is an antagonist?
A drug that has no effect once bound to the target receptor
What is efficacy?
A drug’s ability to have an effect
What is an agonist of the somatic nervous system?
Acetylcholine
What is an antagonist of the somatic nervous system?
Neostigmine
What is an agonist of the parasympathetic muscarinic receptors?
Acetylcholine
Carbachol
Muscarine
What is an antagonist of the parasympathetic muscarinic receptors?
Atropine
What is an agonist of the parasympathetic nicotinic receptors?
Acetylcholine
Carbachol
What is an antagonist of the parasympathetic nicotinic receptors?
Hexamethonium
What are the classes of adrenoreceptors?
Alpha 1a, 1b, 1d, 2a, 2b, 2c
Beta 1, 2, 3
What are agonists of alpha 1 adrenoreceptors?
Noradrenaline
Phenylephrine
What are antagonists of alpha 1 adrenoreceptors?
Prazosin
Phentolamine
What are agonists of alpha 2 adrenoreceptors?
Noradrenaline
Clonidine
What are antagonists of alpha 2 adrenoreceptors?
Yohimbine
What are agonists of beta adrenoreceptors?
Adrenaline
Salbutamol
