Země: Jihoafrická republika
Jazyk: angličtina
Zdroj: South African Health Products Regulatory Authority (SAHPRA)
Allergan
ZORAC® GEL SCHEDULING STATUS: Schedule 3 PROPRIETARY NAME (and dosage form): ZORAC ® GEL ZORAC ® 0,05% Gel and ZORAC ® 0,1% Gel COMPOSITION: ZORAC® 0,05% Gel: Tazarotene 0,5 mg/g of gel ZORAC® 0,1% Gel: Tazarotene 1 mg/g of gel Preservative: Benzyl alcohol 1,0% (m/m) Antioxidants: Ascorbic acid 0,5% (m/m) Butylhydroxyanisole 0,5% (m/m) Butylhydroxytoluene 0,5% (m/m) PHARMACOLOGICAL CLASSIFICATION A 13.9.1 Dermatological preparations. Preparations for psoriasis PHARMACOLOGICAL ACTION Tazarotene is a member of the acetylenic class of retinoids. Tazarotene is a retinoid prodrug which is converted to its active form, M1 ("tazarotenic acid'), by rapid de-esterification in most biological systems. "Tarazotenic acid" binds to and regulates gene expression through all three members of the RAR family of retinoid nuclear receptors, RAR alpha , RAR beta and RAR gamma . Within the RAR family, "tazarotenic acid" shows selectivity for RAR beta and RAR gamma . "Tazarotenic acid" does not bind to or activate the RXR family of receptors. In addition, both cellular and in vivo studies show that, like tretinoin, tazarotene modulates cell differentiationand proliferation in a wide range of tissues. Among its specific pharmacological activities, topical tazarotene blocks induction of epidermal ornithine decarboxylase (ODC) activity in the hairless mouse by the tumour promoter 12-O-tetradecanoylphorbol 13-acetate (TPA). ODC catalyzes the first step in polyamine synthesis and is associated with cell proliferation and hyperplasia; both ODC activity and hyperplasia are elevated in the epidermal layer of the psoriatic plaque. In cultured human keratinocytes, tazarotene suppresses expression of MRP8, an inflammatory marker present in psoriatic epidermis at high levels and blocks the synthesis of cornified enve Přečtěte si celý dokument