CA2850024C — Non-aqueous patch comprising lidocaine
Assigned to Oishi Koseido Co Ltd · Expires 2020-07-07 · 6y expired
What this patent protects
[Problem] In a non-aqueous patch containing lidocaine, the adhesive force of the preparation tends to lower with an increase in the content of lidocaine. To release an effective amount of lidocaine from a patch to the skin, it is a common practice to dissolve lidocaine using a so…
USPTO Abstract
[Problem] In a non-aqueous patch containing lidocaine, the adhesive force of the preparation tends to lower with an increase in the content of lidocaine. To release an effective amount of lidocaine from a patch to the skin, it is a common practice to dissolve lidocaine using a solubilizing agent. However, an increase in the content of the solubilizing agent causes even more remarkable lowering of the adhesive force, which makes long-term adhesion impossible. [Solution] A non-aqueous patch, wherein a biaxially stretching extensible fabric having a strength under 50% extension in the long side direction of not more than 2000 g/50 mm is used as a support for a lidocaine-containing ointment, and an ointment base contains a solubilizing agent together with lidocaine and/or a reaction product thereof.
Drugs covered by this patent
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
Track this patent
Get a daily-checked alert when vulnerability score, expiry, classification, or assignee changes. Email, Slack, or Teams delivery. Pro: 50 watches, Free: 3.