METHOD FOR MANAGING NEUROPATHIC PAIN Russian patent published in 2015 - IPC A61K31/24 A61K47/38 A61K47/32 A61P23/02 

FIELD: medicine.

SUBSTANCE: invention refers to chemical-pharmaceutical industry and represents a pain control formulation containing 4 wt % to 10 wt % of Lidocaine and 4 wt % to 10 wt % of Tetracaine, 10 wt % to 40 wt % of polyvinyl alcohol, water and sorbitan monostearate (Span 60) as an emulsifier, wherein water/PVA mass ratio makes more than 2.5, wherein the formulation provides the transdermal delivery of Lidocaine and Tetracaine, and wherein the delivery is terminated or considerably slows down when water evaporates completely, and wherein the formulation possess an initial viscosity from approximately 28,000 centipoise to approximately 828,000 centipoise, and shows a after 3 freeze-thaw cycles at least 2 times as much as the initial viscosity; the freeze-thaw cycle is determined by placing the formulation into the environment of temperature -18°C to -22°C for the time period of 48 hours and thawing the formulation at room temperature (approximately 25°C) for the time period of 48 hours.

EFFECT: invention provides the improved long-term storage of the compositions.

16 cl, 9 ex, 7 tbl, 2 dwg