Lecture 3 Drug Absorption Bioavailability Shiksha Therapy

Welcome to Lecture 3 of General Pharmacology on SHIKSHA THERAPY by Lalit Parihar. In this lecture, we discuss Drug Absorption and Bioavailability in a simple, conceptual, and exam-focused manner. The lecture explains how a drug moves from its site of administration into systemic circulation and how the rate and extent of absorption determine its bioavailability. Topics covered: Definition and process of drug absorption Mechanisms of drug absorption Passive diffusion, facilitated diffusion, active transport, endocytosis, and filtration Factors affecting drug absorption Role of pH, pKa, and drug ionization First-pass metabolism and presystemic drug loss Concept of bioavailability (F) IV vs extravascular bioavailability Plasma concentration–time curve Cmax, Tmax, and AUC Absolute and relative bioavailability Clinical significance of absorption and bioavailability This lecture is useful for B.Pharm, D.Pharm, Pharm.D, Nursing, MBBS, and other healthcare students studying basic and general pharmacology. 📚 General Pharmacology Lecture Series Lecture 1: Introduction to Pharmacology Lecture 2: Pharmacokinetics – ADME Lecture 3: Drug Absorption & Bioavailability Next Lecture: Drug Distribution and Volume of Distribution If this lecture helps you understand pharmacology better, Like, Share, Subscribe, and Comment. SHIKSHA THERAPY by Lalit Parihar Learn • Understand • Excel #Pharmacology #DrugAbsorption #Bioavailability #Pharmacokinetics #ADME #GeneralPharmacology #BPharm #DPharm #PharmacyStudents #PharmacologyLecture #ShikshaTherapy