Updated 6 min read
Organise by dosage form
Group your revision into solids, liquids and disperse systems, semi-solids and sterile products. For each, cover the formulation principle, the manufacturing steps, the quality control tests and the typical stability problems. That structure mirrors how questions are written.
Own a small set of equations
For each equation, know what every term means and which way the result moves when a term changes. Many MCQs ask exactly that, without any arithmetic.
- Stokes' law for sedimentation of suspensions
- Noyes–Whitney equation for dissolution rate
- Zero-order and first-order kinetics for shelf life
- HLB calculations for emulsifier blends
- Freezing-point depression for isotonicity
Link every test to a failure
Disintegration, dissolution, friability, hardness, weight variation, sterility and pyrogen tests each detect a specific failure. Learning them as 'problem and the test that catches it' is faster and more durable than memorising a list.
Common mistakes
- Confusing flocculated and deflocculated suspensions and their sedimentation behaviour
- Mixing up the shelf-life formulas for zero-order and first-order degradation
- Forgetting that sterilisation method depends on heat and moisture sensitivity
- Treating HLB ranges as arbitrary rather than linked to emulsion type
Practise calculations weekly
Calculation skills fade quickly. A short set of shelf-life, isotonicity and dilution problems each week keeps them automatic through to the exam.