Pharmacology /Pharm Y2S2 - Astra Zeneca
Pharm Y2S2 - Astra Zeneca
This deck covers key concepts related to pharmaceutical processes and equipment, focusing on powder mixing, granulation, and tablet production.
What is developability?
Assessing whether physicochemical properties and dose of API hinder or aid the development
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Key Terms
Term
Definition
What is developability?
Assessing whether physicochemical properties and dose of API hinder or aid the development
What are the three mechanisms of powder mixing?
Convective, reducing scale of segregation Diffusive, random motion required for microscopic mixing Shear mixing, for cohesive particles
What are the three mechanisms of segregation?
Elutriation, smaller particles end up on top Sifting, big particles end up on top Trajectory
What three properties must be controlled during milling/granulating?
Tensile strength- maximised Porosity- optimised Granule PSD- minimised
What are the two types of powder flow regimes in wet granulation?
Bumping- impeller moving around, powder moving up and down, slow consolidation speed Roping- good for dry mixing, high consolidation speed in wet gran...
What is hot melt extrusion?
API dispersed in polymer, barrel heated to melt polymer, extrudate cut into small particles for subsequent processing
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Term | Definition |
---|---|
What is developability? | Assessing whether physicochemical properties and dose of API hinder or aid the development |
What are the three mechanisms of powder mixing? | Convective, reducing scale of segregation Diffusive, random motion required for microscopic mixing Shear mixing, for cohesive particles |
What are the three mechanisms of segregation? | Elutriation, smaller particles end up on top Sifting, big particles end up on top Trajectory |
What three properties must be controlled during milling/granulating? | Tensile strength- maximised Porosity- optimised Granule PSD- minimised |
What are the two types of powder flow regimes in wet granulation? | Bumping- impeller moving around, powder moving up and down, slow consolidation speed Roping- good for dry mixing, high consolidation speed in wet granulation |
What is hot melt extrusion? | API dispersed in polymer, barrel heated to melt polymer, extrudate cut into small particles for subsequent processing |
What is the role of compaction pressure? | More compression reduces porosity of tablets, increasing disintegration and tensile strength |
What is dwell time? | Time at which tablet punch exerts maximum pressure |
What is pre-capping? | Splits/cracks on the sides of tablets due to excessive compression |
What is capping? | Complete or partial segregation of tablet face |
What is picking? | Removal of material from tablet face |
What is a pan coater? | Spray guns used to spray coating solution onto tablet, hot air moves through to dry tablets |
What is a fluid bed coater? | Typically used for pellet coating, spray concurrent to pellet flow and pellets fall to the bottom of the bed for re-entry into the tube |
What is the purpose of wet granulation? | Produce larger agglomerates from fine powders Improving product appearance and compressibility Controlling solubility and porosity |
What occurs if the bowl fill level is below the optimal? | Chopper redundant Poor mixing Slower consolidation rates |
What occurs if the bowl fill level is above the optimal? | Poor water distribution throughout powder bed Poor mixing Higher consolidation rates |