In this video, We can tell that how the drug interacts with the body and produces its concerned effects all under the heading of pharmacodynamics together with the receptors that mediated drug interaction and types of drugs receptors present. TIMELINE: 0:11 Introduction 0:29 Principles of drug action 0:43 Mechanism of drug action 1:23 Enzymes involved 1:27 Ion channels 1:42 Nicotinic cholinergic receptors 2:00 Transporters basics and types 4:11 Visual representation by image 4:51 Types of receptors 6:07 Function of receptors 6:50 Drug potency and efficacy