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WorksheetsQuiz on Pharmaceutical Suspensions
Total questions: 15
Worksheet time: 8mins
What is a pharmaceutical suspension?
A gas mixture
A solution of soluble drugs
Coarse particles suspended in a liquid medium
A solid dosage form
Which of the following is an example of a topical suspension?
Paracetamol suspension
Zinc oxide solution
Calamine lotion
Procaine suspension
What is the particle size classification for coarse dispersions?
<1 nm
>1000 nm
1-100 nm
100-1000 nm
What is one advantage of using suspensions for insoluble drugs?
They are easier to transport
They are more palatable
They are less stable
They require no shaking before use
What is a disadvantage of suspensions?
They require shaking before use
They are always stable
They are less bulky
They are easy to prepare
What type of suspension has a sedimentation rate that is high and is easily re-dispersible?
Deflocculated suspension
Flocculated suspension
Colloidal suspension
Dilute suspension
What is the zeta potential a measure of?
Viscosity of the medium
Electrostatic repulsion or attraction between particles
Sedimentation rate
Particle size
Which of the following is a characteristic of deflocculated suspensions?
Rapid sedimentation
Loose aggregates
Difficult to redisperse
High sediment height
What is the ideal particle size range to prevent rapid sedimentation in suspensions?
<1 micron
1-5 microns
5-25 microns
>25 microns
What is the purpose of using a wetting agent in suspensions?
To stabilize the suspension
To enhance flavor
To remove air from the surface of particles
To increase viscosity
Which of the following is a characteristic of colloidal suspensions?
Particles >1 micron
Easily visible to the naked eye
Particles <1 micron
High sedimentation rate
What happens when the zeta potential is reduced below a certain value?
Sedimentation rate decreases
Suspension becomes more stable
Particles come together
Particles repel each other
What is the sedimentation volume ratio (F) when Vu < Vo?
F = 1
F = 0
F < 1
F > 1
Which of the following is an application of suspensions?
Vaccines
Topical creams
Solid tablets
Oral solutions
What is a desired feature of a suspension?
Requires no shaking
Rapid settling of particles
High viscosity
Easy to pour and no grittiness
