• Pharmacology

    Pharmacodynamics

    Pharmacodynamics Pharmacodynamics is derived from the Greek word i.e. “Pharmacon” means Drugs and “Dynamics” means Action. It is the study of biochemical and physiological effects of drug and their mechanism of action at the organ level and cellular level. “What the drugs do to the body when they administered”. Site of drugs action Extracellular Cellular Intracellular Principle/types of drugs action Stimulation The enhancement of the activity of specialized cells. Example: Adrenaline stimulates the heart, pilocarpine stimulates salivary glands. Excessive stimulation is often followed by depression of that function. For example, a high dose of picrotoxin (CNS stimulant) produces convulsions followed by coma and respiratory depression. Depression The specialized cells selectively…

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