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Nasal spray steroid formulation and method

a steroid and nasal spray technology, applied in the direction of biocide, drug composition, aerosol delivery, etc., can solve the problems of low bioavailability, mucosal irritation, loss of estrogen's health protective effect, etc., and achieve the effect of easing symptoms

Inactive Publication Date: 2006-07-06
BALANCE PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a nasal preparation containing an estrogenic compound, an androgenic compound, and optionally a progestin compound in a cyclodextrin complex. The preparation can be used for contraception, treatment of benign gynecological disorders, and hormone replacement therapy. The preparation is administered in a bolus form, with the same therapeutic effect as a slow-release preparation. The invention also includes a drug-delivery system for transdermal or intranasal administration, with the nasal preparation offering a biological effect similar to that of the transdermal route. The invention also includes a method of formulating different steroids in a water-soluble form for uptake by a human subject through mucosal tissue.

Problems solved by technology

This reduction of endogenous estrogen levels results in the loss of estrogen's health protective effects, particularly with respect to bone mineral density.
Thus, for many drugs administration intranasally is inefficient due to low uptake of the drug, hence low bioavailability.
Another potential problem associated with intranasal delivery is mucosal irritation.
Irritation caused by the drug itself and / or by absorption or penetration promoters or enhancers often limits the success of nasal formulations.
Chronic administration of irritating nasal formulations can cause necrosis, inflammation, exudation, removal of the epithelial monolayer or can lead to irreversible damage to the nasal mucosa.
However, formulations comprised of an estrogenic compound and an androgenic compound such as testosterone that are therapeutically effective when delivered intranasally and that are sufficiently non-irritating to the nasal mucosa for commercial viability have not been described.

Method used

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  • Nasal spray steroid formulation and method

Examples

Experimental program
Comparison scheme
Effect test

example 1

Solubility of 17β-Estradiol and Testosterone with 2-Hydroxypropyl-β-cyclodextrin in Water

[0072] The solubility of 17β-estradiol and testosterone in varying concentrations of 2-hydroxypropyl-β-cyclodextrin (MW 1380 g / mole; 5.5 degree of substitution) was determined as follows. 10 ng 17β-estradiol (MW 272.39 g / mole) was added to 1 mL of 2-hydroxypropyl-β-cyclodextrin in water, the 2-hydroxypropyl-β-cyclodextrin concentration ranging from 10 to 250 ng / mL. In a second series of vials, 20 ng of testosterone (MW 288.43 g / mole) was added to 1 mL of 2-hydroxypropyl-β-cyclodextrin in water, the 2-hydroxypropyl-β-cyclodextrin concentration ranging from 10 to 250 ng / mL. In a third set of vials 10 ng 17β-estradiol and 20 ng testosterone were added to 1 mL of 2-hydroxypropyl-β-cyclodextrin in water, the 2-hydroxypropyl-β-cyclodextrin concentration ranging from 10 to 250 ng / mL. The vials were mixed at room temperature for about 1 hour. Aliquots were taken from the supernatant of each vial and as...

example 2

Preparation of Intranasal Formulation

[0073] 2-Hydroxypropyl-β-cyclodextrin was added to water at a concentration of 240 mg / mL and stirred until dissolved. 17β-estradiol was then added to the water-cyclodextrin solution at a concentration of 1.0 mg / mL. The mixture was stirred until dissolution. Testosterone at a concentration of 5.0 mg / mL was then added, and after stirring to dissolution benzalkonium chloride (0.1 mg / mL), ethylene diamine tetra acetic acid (EDTA; 1 mg / mL), and sorbitol (61.6 mg / mL) were added. The mixture was stirred. The volume was brought to the final desired volume and the pH was adjusted as needed. Table 6 summarizes the preparation components, concentrations, and dosages per 50 μL.

TABLE 6Components in Exemplary Nasal PreparationConcentrationComponent(mg / mL)Dose per 50 μL17β-estradiol1.050μgTestosterone5.0250μg2-hydroxypropyl-β-cyclodextrin24012mgBenzalkonium chloride0.15μgEDTA1.050μgSorbitol61.63.1mgWater, USPas required

example 3

Comparison of Intranasally and Transdermally Delivered Estradiol

[0074] Postmenopausal or surgically-postmenopausal females (n=63) were recruited for participation in the study. Thirty women were selected for treatment with transdermal 17β-estradiol from a Noven Vivelle® 50 μg / day patch. Thirty women were treated with transdermal 17β-estradiol from a Noven Vivelle-dot® 50 μg / day patch. The remaining three women were treated intranasally with a single 100 μL bolus spray containing 350 μg 17β-estradiol per spray. The spray formulation in addition to estradiol was comprised of sorbitol (61.6 mg / mL), EDTA (1.0 mg / mL), benzalkonium chloride (0.1 mg / mL), and 2-hydroxypropyl-β-cyclodextrin (100 mg / mL). Blood samples were drawn at defined intervals for analysis of serum estradiol levels. The average concentration of serum estradiol over 24 hours as pg / mL was determined and the results are shown in Table 3.

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Abstract

The present invention relates to an improvement in a method of contraception, in treatment of benign gynecological disorders, and in hormone replacement. The improved method includes administering intranasally an estrogenic compound and an androgenic compound, and in some embodiments an optional progestin compound, in a once-daily bolus formulation comprised of the two or three steroids complexed with a cyclodextrin. An intranasal delivery system for administration of the formulation is also described.

Description

[0001] This application is a continuation of U.S. application Ser. No. 10 / 295,337 filed Nov. 15, 2002, now pending; which claims the benefit of U.S. Provisional Application No. 60 / 400,576 filed Aug. 2, 2002, both of which are incorporated herein by reference in their entirety.FIELD OF THE INVENTION [0002] The present invention relates to an improvement in a method of contraception or in treatment of benign gynecological disorders in conjunction with a GnRH compound, or in hormone replacement for postmenopausal or surgically postmenopausal women where an estrogenic compound and an androgenic compound and, optionally, a progestin compound are administered. The improvement involves administering the estrogenic compound and the androgenic compound and, optionally, a progestin compound intranasally in a once-daily bolus of a formulation comprised of the two or three steroids complexed with a cyclodextrin. BACKGROUND OF THE INVENTION [0003] During a woman's reproductive life, a delicate a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K31/724A61L9/04A61K31/56A61K31/715
CPCA61K31/56A61K31/715A61K31/724A61K2300/00Y10S514/843Y10S514/841Y10S514/874
Inventor PIKE, MALCOLM C.SPICER, DARCY V.DANIELS, ANNAMARIEDANIELS, JOHN R.
Owner BALANCE PHARMA
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