SELF-PRESERVED EMULSIONS
First Claim
1. An emulsion suitable for ocular, nasal or otic administration comprisingwater,a buffering agent,an oil,an emulsifier,a pH adjuster,a multifunctional synthetic compound of formula I, wherein:
- x is 1 to 3 or mixtures thereof,x+y is equal to 3;
a is 0 to 2;
z is equal to x;
B is O—
or OM;
A is an anion;
M is a cation;
Y is selected from the group consisting of OH, O—
C1-C10 alkyl and O—
C1-C10 alkenyl;
andR1, R2 and R3 are the same or different and are alkyl, substituted alkyl, alkyl aryl or alkenyl groups, optionally interrupted by —
NHC(═
O)—
, of up to 16 carbon atoms with the proviso that the total carbon atoms in R1+R1+R3 is between 10 and 24,and optionally a therapeutic agent.
1 Assignment
0 Petitions
Accused Products
Abstract
The use of multifunctional synthetic compounds to both stabilize and preserve therapeutic emulsions is described. The multifunctional synthetic compounds have unique molecular arrangement wherein a phosphate group is linked to one, two or three quaternary ammonium functionalities via a substituted propenyl group, and each quaternary ammonium functionality is further linked to at least one hydrocarbon chain. The pharmaceutical emulsions which include these multifunctional compounds may be prepared without heating or homogenization, and may not require the use of any additional stabilizing or preserving agents.
-
Citations
20 Claims
-
1. An emulsion suitable for ocular, nasal or otic administration comprising
water, a buffering agent, an oil, an emulsifier, a pH adjuster, a multifunctional synthetic compound of formula I, wherein: -
x is 1 to 3 or mixtures thereof, x+y is equal to 3; a is 0 to 2; z is equal to x; B is O—
or OM;A is an anion; M is a cation; Y is selected from the group consisting of OH, O—
C1-C10 alkyl and O—
C1-C10 alkenyl;and R1, R2 and R3 are the same or different and are alkyl, substituted alkyl, alkyl aryl or alkenyl groups, optionally interrupted by —
NHC(═
O)—
, of up to 16 carbon atoms with the proviso that the total carbon atoms in R1+R1+R3 is between 10 and 24,and optionally a therapeutic agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of both preserving and stabilizing an emulsion for pharmaceutical use, comprising adding to the emulsion a stabilizing and preserving amount of a multifunctional compound of formula (I),
wherein: -
x is 1 to 3 or mixtures thereof; x+y is equal to 3; a is 0 to 2; z is equal to x; B is O—
or OM;A is an anion; M is a cation; Y is selected from the group consisting of OH, O—
C1-C10 alkyl and O—
C1-C10 alkenyl; andR1, R2 and R3 are the same or different and are alkyl, substituted alkyl, alkyl aryl or alkenyl groups, optionally interrupted by —
NHC(═
O)—
, of up to 16 carbon atoms with the proviso that the total carbon atoms in R1+R1+R3 is between 10 and 24. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A method of preparing an emulsion suitable for ophthalmic, otic or nasal administration, wherein to a composition comprising a buffering agent, an oil, an emulsifier, a pH adjuster and optionally a therapeutic agent is added, in an amount sufficient to both preserve and stabilize said composition, a multifunctional synthetic compound of formula (I)
wherein: -
x is 1 to 3 or mixtures thereof; x+y is equal to 3; a is 0 to 2; z is equal to x; B is O—
or OM;A is an anion; M is a cation; Y is selected from the group consisting of OH, O—
C1-C10 alkyl and O—
C1-C10 alkenyl;and R1, R2 and R3 are the same or different and are alkyl, substituted alkyl, alkyl aryl or alkenyl groups, optionally interrupted by —
NHC(═
O)—
, of up to 16 carbon atoms with the proviso that the total carbon atoms in R1+R2+R3 is between 10 and 24. - View Dependent Claims (17, 18, 19, 20)
-
Specification