Injectable capsaicin with vasocontrictor adjunctive agent

Abstract

Disclosed in certain embodiments is a method for relieving pain at a site in a human or animal in need thereof, comprising administering by injection or infiltration, a dose of a capsaicinoid and coadministering a vasoconstrictor.

1 . A method for relieving pain at a site in a human or animal in need thereof, comprising: administering at a discrete painful site in a human or animal in need thereof a single injectable or implantable dose of a capsaicinoid in an amount effective to denervate said discrete site without eliciting an effect outside the discrete location and to attenuate pain emanating from said site, said effective dose being from about 1 mcg to about 5000 mcg of capsaicin or a therapeutically equivalent dose of a capsaicinoid other than capsaicin; and coadministering an amount of a vasoconstrictor. 
   
   
       2 . The method of  claim 1 , wherein the vasoconstrictor is in the same formulation as the capsaicinoid. 
   
   
       3 . The method of  claim 1 , wherein the vasoconstrictor is in a different formulation than the capsaicinoid. 
   
   
       4 . The method of  claim 1 , wherein the vasoconstrictor is administered by a different route than the capsaicinoid. 
   
   
       5 . The method of  claim 1 , wherein the vasoconstrictor is administered by the same route as the capsaicinoid. 
   
   
       6 . The method of  claim 1 , wherein the vasoconstrictor is administered orally, via implant, parenterally, sublingually, rectally, topically, or via inhalation. 
   
   
       7 . The method of  claim 3 , wherein the administration of the capsaicinoid and the coadministration of the vasoconstrictor have overlapping durations of effect. 
   
   
       8 . The method of  claim 1 , wherein the vasoconstrictor is selected from the group consisting of catecholamines, alpha-1 and alpha-2 adrenergic agonists, analogs thereof, active metabolites thereof, and mixtures thereof. 
   
   
       9 . The method of  claim 1 , wherein the vasoconstrictor is selected from the group consisting of epinephrine, norepinephrine, dopamine, methoxamine, phenylephrine, mephentermine, metaraminol, mitodrine, methysergide, ergotamine, ergotoxine, dihydroergotamine, sumatriptan, clonidine, guanfacine, guanabenz, methyldopa, ephedrine, amphetamine, methamphetamine, methylphenidate, ethylnorepinephrine ritalin, pemoline, pharmaceutically acceptable salts thereof and mixtures thereof. 
   
   
       10 . The method of  claim 8 , wherein the vasoconstrictor is administered orally. 
   
   
       11 . The method of  claim 8 , wherein the vasoconstrictor is administered parenterally. 
   
   
       12 . The method of  claim 1 , wherein the vasoconstrictor is in an effective amount to restrict the capsaicinoid to the area of administration. 
   
   
       13 . The method of  claim 1 , further comprising administering a local anesthetic to the human or animal. 
   
   
       14 . The method of  claim 1 , wherein said dose of capsaicin is from about 10 to about 3000 mcg. 
   
   
       15 . The method of  claim 1 , wherein said dose of capsaicin is from about 300 to about 1200 mcg. 
   
   
       16 . The method of  claim 1 , wherein said dose of capsaicinoid is administered in a pharmaceutically acceptable vehicle for injection or implantation. 
   
   
       17 . The method of  claim 16 , wherein said pharmaceutically acceptable vehicle is an aqueous vehicle is selected from the group consisting of Sodium Chloride Injection, Ringers Injection, Isotonic Dextrose Injection, Sterile Water Injection, Dextrose, Lactated Ringers Injection and any combinations or mixtures thereof. 
   
   
       18 - 20 . (canceled) 
   
   
       21 . A method for attenuating pain at a surgical site or an open wound in a human or animal, comprising: infiltrating a dose of a capsaicinoid in an amount effective to denervate a site selected from a surgical site or an open wound without eliciting an effect outside the site, said effective dose being from about 1 mcg to about 15,000 mcg of capsaicin or a therapeutically equivalent dose of a capsaicinoid other than capsaicin; and coadministering an amount of a vasoconstrictor. 
   
   
       22 . The method of  claim 21 , wherein the vasoconstrictor is in the same formulation as the capsaicinoid. 
   
   
       23 . The method of  claim 21 , wherein the vasoconstrictor is in a different formulation than the capsaicinoid. 
   
   
       24 - 40 . (canceled)