Proctofoam HC
Generic name:hydrocortisone acetate and pramoxine hydrochloride
Dosage form: aerosol, foam
Drug class:Anorectal preparations
Medically reviewed by Drugs.com. Last updated on Jan 24, 2022.
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DESCRIPTION
Proctofoam® HC (hydrocortisone acetate 1% and pramoxine hydrochloride 1%) is a topical aerosol foam for anal use containing hydrocortisone acetate 1% and pramoxine hydrochloride 1% in a hydrophilic base containing cetyl alcohol, emulsifying wax, methylparaben, poly-oxyethylene-10-stearyl ether, propylene glycol, propylparaben, purified water, trolamine and inert propellants: isobutane and propane.
Proctofoam® HC contains a synthetic corticosteroid used as an anti-inflammatory/antipruritic agent and a local anesthetic.
Hydrocortisone acetate
Molecular weight: 404.50. Solubility of hydrocortisone acetate in water: 1 mg/100 mL.
Chemical name: pregn-4-ene-3,20-dione, 21-(acetyloxy)-11,17-dihydroxy-,(11β)-.
Pramoxine hydrochloride
Molecular weight: 329.86. Pramoxine hydrochloride is freely soluble in water. Chemical name: morpholine, 4-[3-(4-butoxyphenoxy) propyl]-, hydrochloride.
CLINICAL PHARMACOLOGY
Topical corticosteroids share anti-inflammatory, antipruritic and vasoconstrictive actions.
The mechanism of anti-inflammatory activity of the topical corticosteroids is unclear. Various laboratory methods, including vasoconstrictor assays, are used to compare and predict potencies and/or clinical efficacies of the topical corticosteroids. There is some evidence to suggest that a recognizable correlation exists between vasoconstrictor potency and therapeutic efficacy in man.
Pramoxine hydrochloride is a surface or local anesthetic which is not chemically related to the "caine" types of local anesthetics. Its unique chemical structure is likely to minimize the danger of cross-sensitivity reactions in patients allergic to other local anesthetics.
Pharmacokinetics
The extent of percutaneous absorption of...
