Tazarotene

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Tazarotene
Tazarotene.png
Tazarotene-3D-spacefill.png
Clinical data
Trade names Tazorac, Avage, Zorac, Fabior, Arazlo
AHFS/Drugs.com Monograph
Pregnancy
category
  • X (U.S.)
Routes of
administration 		Topical
ATC code
Legal status
Legal status
  • In general: ℞ (Prescription only)
Pharmacokinetic data
Protein binding >99%
Elimination half-life 19 Hours
Identifiers
  • ethyl 6-[2-(4,4-dimethyl-3,4-dihydro-2H-1-benzothiopyran-6-yl)ethynyl]pyridine-3-carboxylate
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard 100.115.380 OOjs UI icon edit-ltr-progressive.svg
Chemical and physical data
Formula C21H21NO2S
Molar mass 351.46 g·mol−1
3D model (JSmol)
  • O=C(OCC)c1ccc(nc1)C#Cc3ccc2SCCC(c2c3)(C)C
  • InChI=1S/C21H21NO2S/c1-4-24-20(23)16-7-9-17(22-14-16)8-5-15-6-10-19-18(13-15)21(2,3)11-12-25-19/h6-7,9-10,13-14H,4,11-12H2,1-3H3 Yes check.svgY
  • Key:OGQICQVSFDPSEI-UHFFFAOYSA-N Yes check.svgY
   (verify)

Tazarotene, sold under the brand name Tazorac, among others, is a third-generation prescription topical retinoid. [1] [2] It is primarily used for the treatment of plaque psoriasis and acne. [3] Tazarotene is also used as a therapeutic for photoaged and photodamaged skin. [3] Tazarotene is a member of the acetylenic class of retinoids. [3]

Contents

It is available as a generic medication. [4] [5]

Medical uses

Tazarotene is most commonly used topically to treat acne vulgaris and psoriasis. [3] Like other topical retinoids, such as tretinoin and adapalene, tazarotene can be combined with benzoyl peroxide or an oral antibiotic, such as clindamycin or dapsone, for the treatment of acne. [6] This results in increased efficacy compared to tazarotene monotherapy. [6] For psoriasis, a combination therapy of tazarotene and a mid- to high-potency corticosteroid is more effective than either treatment alone. [7]

Tazarotene can also be used for the treatment of photodamaged skin. It can reduce the clinical and histological signs of photodamaged skin. [8] The therapy is more effective when used with the daily application of sunscreen. [9]

Pregnancy

Before 2015, tazarotene was considered a Category X drug (meaning its use was contraindicated during pregnancy) according to Food and Drug Administration (FDA) guidelines, despite demonstrating similar plasma retinoid levels as adapalene and tretinoin, which were classified as Category C drugs. [10] Under the FDA's updated Pregnancy and Lactation Labeling Rule which eliminated the lettered pregnancy categories and came into effect in 2015, tazarotene was determined to be contraindicated in pregnancy. [10] Because of the lack of pregnancy outcomes data for the drug, the determination was based on the teratogenic effects observed in rat and rabbit studies. [11] [10]

Contraindications

Tazarotene is contraindicated for use in patients who are known to be or suspected of being pregnant. Tazarotene is a known teratogen. [3] It is also contraindicated in patients with a known hypersensitivity to any ingredient in the specific pharmaceutical formulation. [3]

Adverse effects

Adverse effects for tazarotene include skin irritation, such as redness, itchiness, and burning. In patients with psoriasis, these adverse effects can be mitigated by a combined treatment with either mometasone furoate or fluocinonide. [7] These effects tend to be mild to moderate, and increase in intensity as tazarotene concentration increases. [12]

Pharmacology

Mechanism of action

Tazarotene is selective for two types of retinoic acid receptors, RAR-γ and RAR-β. [13] Like all retinoids, it affects the ability of keratinocytes in the epidermis to proliferate and differentiate. [13] It does so by upregulating filaggrin expression and downregulating the expression of keratinocyte transglutaminase, ornithine decarboxylase, involucrin, epidermal growth factor receptor, and various keratins. [14]

Pharmacokinetics

More than 99% of tazarotenic acid, the active metabolite of tazarotene, in the blood binds to plasma proteins (the most predominant being albumin). [15] The volume of distribution (VD) for tazarotene is 26.1 L/kg and the VD for tazarotenic acid is 1.97 L/kg. [15] Tazarotene is excreted from the body via feces and urine equally, [7] and it has an elimination half-life of 16 [16] to 18 hours. [17]

Synthesis

Acetylenic retinoid prodrug converted to the active metabolite, tazarotenic acid, with selective affinity for retinoic acid receptors RARβ and RARγ.

Tazarotene synthesis: Tazarotene synthesis.svg
Tazarotene synthesis:

The formation of the ring system involves first alkylation of the anion from thiophenol with dimethylallyl bromide (1) to give the thioether (2). Friedel-Crafts cyclization of the olefin with the equivalent of PPA then gives the thiopyran (3). Acylation with acetyl chloride in the presence of aluminium chloride gives the methyl ketone (4). Reaction of the enolate of that ketone with diethyl chlorophosphate gives the enol phosphate 5 as a transient intermediate. This eliminates diethyl phosphite in the presence of excess base to give the corresponding acetylene 6. The anion from the reaction of the acetylene with base is then used to displace chlorine from Ethyl 6-chloronicotinate (7). This reaction affords the coupling product tazarotene (8).

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References

  1. ↑ Thielitz A, Abdel-Naser MB, Fluhr JW, Zouboulis CC, Gollnick H (December 2008). "Topical retinoids in acne--an evidence-based overview". J Dtsch Dermatol Ges. 6 (12): 1023–31. doi: 10.1111/j.1610-0387.2008.06741.x . PMID   18479477.
  2. ↑ American Society of Health-System Pharmacists, Inc. "Tazarotene". MedlinePlus Drug Information. U.S. National Library of Medicine. Retrieved September 16, 2017.
  3. 1 2 3 4 5 6 "Tazarotene Monograph for Professionals". Drugs.com. American Society of Health-System Pharmacists. Retrieved March 11, 2021.
  4. ↑ "2022 First Generic Drug Approvals". U.S. Food and Drug Administration (FDA). March 3, 2023. Archived from the original on June 30, 2023. Retrieved June 30, 2023.
  5. ↑ "Competitive Generic Therapy Approvals". U.S. Food and Drug Administration (FDA). June 29, 2023. Archived from the original on June 29, 2023. Retrieved June 29, 2023.
  6. 1 2 Kolli SS, Pecone D, Pona A, Cline A, Feldman SR (June 2019). "Topical Retinoids in Acne Vulgaris: A Systematic Review". Am J Clin Dermatol. 20 (3): 345–365. doi:10.1007/s40257-019-00423-z. PMID   30674002. S2CID   59225325.
  7. 1 2 3 Foster RH, Brogden RN, Benfield P (May 1998). "Tazarotene". Drugs. 55 (5): 705–11, discussion 712. doi:10.2165/00003495-199855050-00008. PMID   9585866.
  8. ↑ Stratigos AJ, Katsambas AD (2005). "The role of topical retinoids in the treatment of photoaging". Drugs. 65 (8): 1061–72. doi:10.2165/00003495-200565080-00003. PMID   15907143. S2CID   24854629.
  9. ↑ Ogden S, Samuel M, Griffiths CE (2008). "A review of tazarotene in the treatment of photodamaged skin". Clin Interv Aging. 3 (1): 71–6. doi: 10.2147/cia.s1101 . PMC   2544371 . PMID   18488880.
  10. 1 2 3 Han G, Wu JJ, Del Rosso JQ (September 2020). "Use of Topical Tazarotene for the Treatment of Acne Vulgaris in Pregnancy: A Literature Review". J Clin Aesthet Dermatol. 13 (9): E59–E65. PMC   7577328 . PMID   33133344.
  11. ↑ "Arazlo (tazarotene) [package insert]" (PDF). Drugs@FDA. U.S. Food and Drug Administration. Retrieved March 11, 2021.
  12. ↑ Mukherjee S, Date A, Patravale V, Korting HC, Roeder A, Weindl G (2006). "Retinoids in the treatment of skin aging: an overview of clinical efficacy and safety". Clin Interv Aging. 1 (4): 327–48. doi: 10.2147/ciia.2006.1.4.327 . PMC   2699641 . PMID   18046911.
  13. 1 2 Duvic M, Nagpal S, Asano AT, Chandraratna RA (August 1997). "Molecular mechanisms of tazarotene action in psoriasis". J Am Acad Dermatol. 37 (2 Pt 3): S18–24. doi:10.1016/S0190-9622(97)80396-9. PMID   9270552.
  14. ↑ Heath MS, Sahni DR, Curry ZA, Feldman SR (September 2018). "Pharmacokinetics of tazarotene and acitretin in psoriasis". Expert Opin Drug Metab Toxicol. 14 (9): 919–927. doi:10.1080/17425255.2018.1515198. PMID   30134735. S2CID   52070149.
  15. 1 2 Tang-Liu DD, Matsumoto RM, Usansky JI (October 1999). "Clinical pharmacokinetics and drug metabolism of tazarotene: a novel topical treatment for acne and psoriasis". Clin Pharmacokinet. 37 (4): 273–87. doi:10.2165/00003088-199937040-00001. PMID   10554045. S2CID   36445158.
  16. ↑ Marks R (October 1998). "Pharmacokinetics and safety review of tazarotene". J Am Acad Dermatol. 39 (4 Pt 2): S134–8. doi:10.1016/s0190-9622(98)70310-x. PMID   9777791.
  17. ↑ Menter A (August 2000). "Pharmacokinetics and safety of tazarotene". J Am Acad Dermatol. 43 (2 Pt 3): S31–5. doi:10.1067/mjd.2000.108321. PMID   10898827.
  18. ↑ Prepn: Chandraratna RA, EP 284288 ; idem, U.S. Patent 5,089,509 (1988, 1992 both to Allergan).
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