Pharmacodynamics & Receptor Mechanism | General Pharmacology | 2nd Year MBBS | Proffixa Med

📚 Proffixa Med — Learn • Prepare • Excel Welcome to General Pharmacology: Pharmacodynamics & Receptor Mechanism, an exam-oriented lecture for 2nd Year MBBS students. In this lecture, we explore how drugs act on the body, how they interact with receptors, and how receptor activation produces pharmacological responses. 🩺 TOPICS COVERED 🔹 Pharmacodynamics Definition and types of drug effects Mechanisms of drug action Non-receptor-mediated drug actions 🔹 Drug–Receptor Interaction Receptors and important terminology Affinity and intrinsic activity Agonists, antagonists, partial agonists and inverse agonists 🔹 Receptor Families Ligand-gated ion channels G-protein-coupled receptors (GPCRs) Transmembrane enzyme-linked receptors Nuclear receptors 🔹 Receptor Mechanisms and Regulation G-protein signalling and second messengers Drug–receptor interaction and cellular response Up-regulation and down-regulation of receptors 🔹 Dose–Response Relationship Graded and quantal dose–response curves Drug potency and efficacy Therapeutic index Drug synergism, antagonism, supersensitivity and tachyphylaxis 🎯 WHO IS THIS LECTURE FOR? ✅ 2nd Year MBBS students ✅ University professional examination preparation ✅ Pharmacology theory and viva revision ✅ Students looking for clear, structured medical notes Learn important pharmacological concepts through organised, handwritten-style notes, diagrams, flowcharts, and high-yield revision points. 👍 Like, share with your classmates, and subscribe to Proffixa Med for more exam-oriented MBBS content. 🔔 Stay connected for upcoming lectures in Pharmacology and other medical subjects. Proffixa Med — Learn • Prepare • Excel #Pharmacodynamics #ReceptorMechanism #GeneralPharmacology #MBBS #SecondYearMBBS #PharmacologyNotes #MedicalEducation #ProffixaMed