Compositions and methods for treating neuropathic sensory loss
The present invention relates to methods of reducing the effects of neuropathically induced negative sensory phenomena (NSP). NSP are manifested as the decreased ability to feel light touch, pain, proprioception, vibration, warmth/heat, and coolness/cold. The NSP are treated by application of an anesthetic. The anesthetic is preferably a benzoic acid-based anesthetic. Specifically, a patch containing about 5% lidocaine may be used. The anesthetic is transdermally administered to a patient suffering from NSP at or near the locus of the negative sensory phenomena.
1 . A method for treating neuropathic negative sensory phenomena comprising applying an anesthetic to a patient suffering from neuropathic negative sensory phenomena at or near the locus of the negative sensory phenomena.
2 . The method of claim 1 wherein said anesthetic is a benzoic acid derivative.
3 . The method of claim 2 , wherein said benzoic acid derivative is selected from the group consisting of benzocaine, procaine, tetracaine, chloroprocaine, propoxycaine, cocaine, proparacaine, mepivacaine, bupivacaine, phenocaine, dibucaine, etidocaine, lidocaine, prilocalne, and pharmaceutically acceptable salts thereof.
4 . The method of claim 3 , wherein the benzoic acid derivative is lidocaine.
5 . The method of claim 4 , wherein the lidocaine is contained in a patch.
6 . The method of claim 5 , wherein said patch contains between about 2% and about 10% lidocaine.
7 . The method of claim 6 , wherein said patch contains about 5% lidocaine.
8 . A method according to claim 1 , wherein method further comprises applying a cover over said anesthetic, said cover formed from a material selected from the group consisting of polyvinyl chloride, polyvinylidene chloride, polyethylene, synthetic rubber, woven polyester fabric, and non-woven polyester fabric.
9 . A method for treating neuropathic negative sensory phenomena by transdermal administration of an anesthetic, said method comprising: applying a non-woven polyester cloth including a physiologically acceptable adhesive, comprising from about 2 to 10% by weight of lidocaine, at or near the locus of the negative sensory phenomena.
10 . A method according to claim 9 , wherein said lidocaine is present in about 5% by weight.
11 . A method for decreasing numbness of the skin of a patient comprising applying a local anesthetic to said skin at or near a site of said numbness.