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The Canadian formulation of Preparation H includes a yeast extract called Biodyne which was removed in 1995 from the formulation sold in the United States. This yeast extract was the primary ingredient of the original formulation by inventor George Sperti , [ 5 ] [ 6 ] and Pfizer believes that it removes wrinkles from skin and heals dry ...
George Speri Sperti (January 17, 1900, Covington, Kentucky – April 29, 1991, Cincinnati, Ohio) was an Italian-American who invented Preparation H hemorrhoid medication. He also invented the Sperti Ultraviolet Lamp, Aspercreme for pain relief, and KVa Power Meter. [1] [2] Sperti graduated from the University of Cincinnati in 1923. Shortly ...
The skin membrane is the area (A) for the topical drug molecules to travel across. The skin membrane thickness is known as (h) in the expression, and it determines the diffusion path length. [4] The (C) is the concentration of the diffusing substance across the skin layers and the (D) is the diffusion coefficient.
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The texture of topical gels is less greasy as it contains a higher proportion of water compared with cream and ointment. [ 3 ] [ 1 ] [ 2 ] [ 8 ] These gels have an excellent spreading property and cooling effect due to solvent evaporation, and also has a higher retention time on the skin.
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A medical professional administering nose drops Instillation of eye drops. A topical medication is a medication that is applied to a particular place on or in the body. Most often topical medication means application to body surfaces such as the skin or mucous membranes to treat ailments via a large range of classes including creams, foams, gels, lotions, and ointments. [1]
A container with cream. Topical cream formulation is an emulsion semisolid dosage form that is used for skin external application. Most of the topical cream formulations contain more than 20 per cent of water and volatiles and/or less than 50 per cent of hydrocarbons, waxes, or polyethylene glycols as the vehicle for external skin application. [1]
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