- Onset of action
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Onset of action is the duration of time it takes for a drug's effects to come to prominence upon administration. With oral administration, it typically ranges anywhere from 20 minutes to over an hour, depending on the drug in question. Other methods of ingestion such as smoking or injection can take as little as seconds to minutes to take effect.
Medication > Pharmacology Pharmacokinetics ADME: Absorption • Distribution • Metabolism • Excretion (Clearance)
Loading dose • Volume of distribution (Initial) • Rate of infusion
Compartment • Bioequivalence • Bioavailability
Onset of action • Biological half-life • Plasma protein binding
Therapeutic index (LD50/ED50)Pharmacodynamics Agonism and antagonism Agonist: Inverse agonist • Irreversible agonist • Partial agonist • Superagonist • Physiological agonist
Antagonist: Competitive antagonist • Irreversible antagonist • Physiological antagonist
Other: Binding • Affinity • Binding selectivity • Functional selectivityOther Related fields/subfields This pharmacology-related article is a stub. You can help Wikipedia by expanding it.