Granulation Techniques (Dry, Wet, and Direct Compression)
Start with the big picture
Wet granulation combines powders with a binder solution, then screens, dries, mills, and lubricates the material. It can support poorly compressible or low-dose formulations, but adds processing steps and exposes ingredients to heat or moisture. Dry granulation forms material through compression, such as slugging or roller compaction, followed by milling; it avoids liquids and drying, making it relevant for heat- or moisture-sensitive drugs when the formulation is suitable. Direct compression skips granulation and compresses a blend directly, so it depends on excipients with strong flow and compressibility. It offers a simpler process but can present dose-uniformity and segregation challenges. The deeper lesson compares these methods, their excipients, process variables, granule quality attributes, and scale-up considerations.
What you'll learn
- Describe how granulation can improve powder flow, compressibility, and homogeneity.
- Outline the main process steps in wet granulation.
- Compare dry granulation and direct compression by process and material requirements.
- Identify formulation benefits and limitations associated with each method.
Continue your study
Work through the complete notes and reinforce the topic with the study tools available in the full lesson.
