A PAIN RELIEF PATCH COMPRISING AN INDICATOR LAYER AND A PREPARATION METHOD THEREOF

摘要

PURPOSE: A manufacturing method of pain relief patch is provided to have an effect that the pain relief patch which visually can show the reduction of the drug component included in the active material reservoir layer of the pain relief patch by manufacturing the pain relief patch equipped with the methyl orange key bed can be provided. CONSTITUTION: A pain relief patch comprises an active material reservoir layer (1) including the methyl salicylate and the key bed (3) including the methyl orange. The pain relief patch additionally comprises the support layer (2) between the active material reservoir layer and key bed. The pain relief patch additionally comprises the release paper (4) in the active material reservoir layer lower surface. A manufacturing method of the pain relief patch comprises the following steps. A step (1 step) preparing for the pain relief patch including the active material reservoir layer including the methyl salicylate. A step (2 step) binding the methyl orange key bed on the pain relief patch is included.