Quiz on Pharmaceutical Suspensions

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