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J Am Acad Dermatol. 1999 Aug;41(2 Pt 1):209-14.

Pharmacokinetics of doxepin in subjects with pruritic atopic dermatitis.

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  • 1Dermatology Clinical Investigations Unit, Pediatric Psychopharmacology Unit, Boston, MA 02114-2696, USA.

Abstract

BACKGROUND:

Doxepin applied topically by itself or in combination with triamcinolone acetonide is a safe and effective treatment for atopic dermatitis.

OBJECTIVE:

We evaluated the pharmacokinetic profile of doxepin and desmethyldoxepin after topical application of doxepin hydrochloride 5% cream alone or in combination with 0.025% triamcinolone acetonide (doxepin/TAC).

METHODS:

Twenty-four subjects with atopic dermatitis received either doxepin or doxepin/TAC cream 4 times daily for 7 days in a randomized, double-blind, controlled trial. Serum samples were obtained and pharmacokinetic parameters estimated from the dose-normalized serum concentrations of doxepin and desmethyldoxepin. Efficacy and adverse experiences were determined by physician and subject evaluations.

RESULTS:

Pharmacokinetic parameters (K(e ), t(1/2 ) and AUC) calculated in 9 subjects (doxepin/TAC = 4 subjects, doxepin = 5 subjects) with detectable serum concentrations were similar for both groups. Pruritus relief and lessening of pruritus severity were significantly greater with doxepin/TAC than doxepin alone.

CONCLUSION:

Topically applied doxepin is safe and effective therapy for pruritus.

PMID:
10426891
[PubMed - indexed for MEDLINE]
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