1-Pastes:paste is a substance that behaves as a solid until a sufficiently large load or stress is applied,at which point it flows like a fluid,paste typically consists of a suspension of small particles in a background fluid,the small particles are jammed together like grains of sand on a beach,forming a disordered,glassy or amorphous structure, and giving pastes their solid-like character,in pharmacology,paste is basic pharmaceutical form,it consists of fatty base (e.g. petroleum jelly) and at least 25% solid substance (e.g. zinc oxide).
2-Ointments:an ointment is a viscous semisolid preparation used topically on a variety of body surfaces.these include the skin and the mucus membranes of the eye (an eye ointment),vagina,glans and nose,an ointment may or may not be medicated.
3-creams:Cream is semi-solid emulsion,that is mixtures of oil and water,they are divided into two types:oil-in-water (O/W) creams which are composed of small droplets of oil dispersed in a continuous aqueous phase,and water-in-oil (W/O) creams which are composed of small droplets of water dispersed in a continuous oily phase.What is the differences between pastes , ointments and creams ?
Viscosity?
Paste - Thick, almost solid form.
Ointment - Not as thick, like grease
Cream - Even less thick, like a thick oil.
My guess.
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