Prolonged anesthesia in joints and body spaces
First Claim
1. A method of treating localized pain, comprising administering into an intra articular joint a formulation comprising (a) controlled release microparticles comprising a local anesthetic and an effective amount of a biocompatible, biodegradable sustained release material prolonging the release of the local anesthetic from the formulation, and (b) a non-toxic augmenting agent in an amount effective to prolong the effect of the local anesthetic in-vivo, said intra articular joint being selected from the group consisting of knee, elbow hip, stemoclavicular, temporomandibular, carpal tarsal, wrist, ankle, and any other joint subject to arthritic conditions, to treat localized pain.
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0 Petitions
Accused Products
Abstract
Sustained release local anesthetic formulations are administered intra articularly and/or into body spaces/cavities. The formulation is preferably a plurality of injectable microparticles including a local anesthetic and an effective amount of a biocompatible, biodegradable, sustained release material prolonging the release of the local anesthetic and optionally and a pharmaceutically acceptable, i.e., non-toxic, augmenting agent effective to prolong the duration of the local anesthesia for a time period longer than that obtainable without the augmenting agent.
348 Citations
38 Claims
- 1. A method of treating localized pain, comprising administering into an intra articular joint a formulation comprising (a) controlled release microparticles comprising a local anesthetic and an effective amount of a biocompatible, biodegradable sustained release material prolonging the release of the local anesthetic from the formulation, and (b) a non-toxic augmenting agent in an amount effective to prolong the effect of the local anesthetic in-vivo, said intra articular joint being selected from the group consisting of knee, elbow hip, stemoclavicular, temporomandibular, carpal tarsal, wrist, ankle, and any other joint subject to arthritic conditions, to treat localized pain.
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15. A method of treating localized joint pain comprising administering into an intra articular joint a formulation comprising (a) controlled release microparticles comprising a local anesthetic and an effective amount of a biocompatible, biodegradable sustained release polymer selected from polyanhydrides, copolymers of lactic acid and glycolic acid, poly(lactic) acid, poly(glycolic) acid, polyesters, polyorthoesters, proteins, polysaccharides and combinations thereof, providing an in-vitro release of said local anesthetic of from 10 to 60 percent after 24 hours, from 20 to 80 percent release after 48 hours, and from 40 to 100 percent release after 72 hours;
- and (b) a non-toxic augmenting agent in an amount effective to prolong the effect of the local anesthetic in-vivo, for providing pain relief said intra articular joint being selected from the group consisting of knee, elbow, hip, stemoclavicular, temporomandibular, carpal, tarsal, wrist, ankle, and any other joint subject to arthritic conditions, and which formulation when administered in-vivo providing pain relief for at least about 24 hours to about 5 days.
- View Dependent Claims (16)
- 18. A method of treating localized pain comprising administering a formulation into a bursae to treat localized pain, said formulation comprising (a) controlled release microparticles comprising a local anesthetic and an effective amount of a biocompatible, biodegradable sustained release material prolonging the release of the local anesthetic from the formulation, and (b) a non-toxic augmenting agent in an amount effective to prolong the effect of the local anesthetic in-vivo, said bursae selected from the group consisting of acromial, bicipitoradial, cubitoradial, deltoid, infrapatellar, ishchiadica, and other bursa known to those skilled in the art to be subject to pain.
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20. The method of claimed 18, wherein at least a portion of said augmenting agent is incorporated into said microparticles.
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32. A method of treating localized joint pain in a mammal, comprising
injecting a formulation into an intra articular joint selected from the group consisting of knee, elbow, hip, stemoclavicular, temporomandibular, carpal, tarsal, wrist, ankle, and any other joint subject to arthritic conditions, said formulation comprising a pharmaceutically acceptable medium containing a plurality of microspheres comprising a local anesthetic and an effective amount of a biocompatible, biodegradable controlled release material said biocompatible, biodegradable controlled release material capable of degrading at least fifty percent in less than two years following injection of the formulation in vivo, said controlled release material being selected from the group consisting of polyanhydrides, copolymers of lactic acid and glycolic acid, poly(lactic) acid, poly(glycolic) acid, polyesters, polyorthoesters, proteins, polysaccharides and combinations thereof, said formulation further comprising a non-toxic augmenting agent which is (i) incorporated into and/or onto said microspheres; - or (ii) incorporated into said pharmaceutically acceptable medium, or (iii) incorporated into said microspheres and also incorporated into said pharmaceutically acceptable medium;
said microspheres being included in said formulation in an amount sufficient to obtain reversible local numbness and/or analgesia for at least about 24 hours when said formulation is injected intra articularly. - View Dependent Claims (33, 34, 35, 36, 37)
- or (ii) incorporated into said pharmaceutically acceptable medium, or (iii) incorporated into said microspheres and also incorporated into said pharmaceutically acceptable medium;
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38. A method of treating localized joint pain comprising administering a formulation comprising (a) controlled release microparticles comprising a local anesthetic and an effective amount of a biocompatible, biodegradable sustained release material prolonging the release of the local anesthetic from the formulation, and (b) a non-toxic augmenting agent in an amount effective to prolong the effect of the local anesthetic in-vivo, to treat localized joint pain.
Specification