| abstract |
A stable non-alcoholic foamable pharmaceutical emulsion composition includes an unctuous emollient, at a concentration of about 0.5% to about 49% by weight; at least one multi-active agent; at a concentration of about 0.5% to about 15% by weight; water; an effective amount of an active pharmaceutical agent having a degree of solubility in the emulsion composition; and at least one liquefied or compressed gas propellant at a concentration of about 3% to about 25% by weight of the total composition; wherein the unctuous emollient comprises a petrolatum alone or in combination with other unctuous agents; wherein the multi active agent is selected from the group consisting of (a) two or more complex emulgators wherein there is a difference of about 4 or more units between the HLB values of two of the emulgators or there is a significant difference in the chemical nature or structure of two of the emulgators; (b) a surfactant and a foam adjuvant or co surfactant, wherein the surfactant has a HLB close to the required HLB of the oil phase; (c) a surfactant and a liquid wax, wherein the surfactant has a HLB close to the required HLB of the oil phase; (d) a surfactant and a polymeric agent other than starch or a modified starch ester, wherein the surfactant has a HLB close to the required HLB of the oil phase; (e) a polymeric agent and a foam adjuvant or co surfactant, which can cooperate to stabilize the emulsion; (f) a single surfactant without a long polymeric side chain that is composed of a mixture of esters having a HLB close to the required HLB of the oil phase; combinations of any of the above, and wherein the composition is substantially flowable is stored in an pressurized container and upon release expands to form a breakable foam. |