US Patent 9308181 Topical formulations, systems and methods

The present disclosure is drawn to topical formulations, transdermal systems, and related methods. In one embodiment, a topical formulation is provided that includes a local anesthetic, a first compound, and a second compound. The first compound and second compound are different and each is selected from the group consisting of N-lauroyl sarcosine, sodium octyl sulfate, methyl laurate, isopropyl myristate, oleic acid, glyceryl oleate, and sodium lauryl sulfoacetate.