5 mL of Trisulfa suspension contains trimethoprim (80 mg) and sulfamethoxazole (400 mg). Also it may be 40 mg trimethoprim and 200 mg sulfamethoxazole.
The suspension is in physical chemistry, a system composed of one substance (suspended phase, suspensoid) dispersed throughout another substance (suspending phase) contained by a moderately finely divided state, but not so finely divided as to acquire the stability of a colloidal system.
Given sufficient time, a suspension will, by definition, separate itself by gravitational action into two visibly distinct portions, whereas a colloidal system, by definition, is stable.
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