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Antagonist: A drug having affinity, no efficacy and slow rate of
dissociation. It blocks the action of an agonist on the receptor e.g.
Atropine and propranolol.
Partial Agonist OR Antagonist: A drug having affinity, efficacy less than
that of agonist and moderate rate of dissociation. It blocks the action of
an agonist on the receptor.
Inverse agonist: agonist have much higher affinity for the inactive state
than for activated state and decreases or abolishes the constitutive
activity (Activity in the absence of ligand is called Constitutive activity)
Dose Response phenomena
Contents Graded Dose Response Relationship
Pharmacology Mnemonics and Short Notes By Muhammad Ramzan Ul Rehman
