Dissolution 15/62: Dissolution Method for Capsules — Gelatin Issues & Solutions

Dissolution Method for Capsules — Gelatin Issues & Practical Solutions Understanding Challenges & Real Lab Fixes Capsule dissolution is not the same as tablet dissolution — and if you treat it the same way, you’ll face floating shells, cross-linking failures, filtration problems, and regulatory questions. In this video, you’ll learn why capsule dissolution behaves differently and how to scientifically troubleshoot every major problem seen with hard gelatin and HPMC capsules — using real industry logic, not shortcuts. If you work in QC, R&D, stability, or method development, this is a must-watch practical guide. 📌 What You’ll Learn in This Video 🔹 Why Capsule Dissolution Is Different Shell hydration vs tablet disintegration Effect of gelatin on release rate Why standard IR logic often fails 🔹 Understanding Gelatin Dissolution Behavior Swelling → rupture → shell dissolution Temperature and pH sensitivity Impact of storage & humidity 🔹 The Major Problem: Gelatin Cross-Linking What cross-linking actually is Why it happens (aldehydes, heat, aging) How it slows or blocks drug release 🔹 Detecting Cross-Linking Visual signs Abnormal dissolution profiles Shell remnants & membrane formation How to confirm cross-linking scientifically 🔹 Using Enzymes to Solve Cross-Linking Pepsin & pancreatin logic When enzyme addition is justified Regulatory expectations Common mistakes with enzyme use 🔹 Floating Issues & How to Fix Them Why capsules float Basket vs paddle selection Sinkers — correct use & pitfalls 🔹 Sticking to Vessel or Paddle Static charge & wetting problems Media composition tricks Mechanical positioning solutions 🔹 Selecting the Right Apparatus USP Apparatus 1 vs 2 When basket is better Hydrodynamic impact explained 🔹 Selecting Dissolution Medium for Capsules pH logic Buffer choice Surfactant use (when needed, when not) 🔹 RPM & Hydrodynamics Optimization Why high RPM hides problems Finding the discriminatory sweet spot Capsule-specific agitation strategy 🔹 Filtration & Sample Preparation Issues Gelatin clogging filters Choosing correct pore size Preventing drug loss during filtration Best lab practices 👩‍🔬 Who Should Watch This Video? ✔ Dissolution analysts ✔ QC professionals ✔ Formulation scientists ✔ Stability teams ✔ Pharma students & freshers ✔ Anyone facing capsule failures