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| Transdermal analgesic patch ： ウィキペディア英語版 |
Transdermal analgesic patch
A transdermal analgesic or pain relief patch is a medicated adhesive patch used to relieve minor to severe pain. There are two primary types of analgesic patches: patches containing counterirritants, which are used to treat mild to moderate pain, and patches containing fentanyl, a narcotic used to relieve moderate to severe pain in opioid-tolerant patients.
==Counterirritant patches==
Counterirritant patches contain ingredients such as capsaicin, methyl salicylate, camphor, or menthol, which are thought to mask pain signals by causing other sensations (itching, warmth, or cooling) in the areas they are applied to. In the United States, patches sold under the brand name Salonpas are approved by the Food and Drug Administration under a New Drug Application (NDA) for the treatment of mild to moderate pain caused by soft tissue injury (e.g. strains and sprains), arthritis, or backache. Other products, including brand names such as Ben Gay and Mentholatum, which are not covered by NDA, indicate relief of minor pain.〔 Counterirritant patches are sold over the counter and do not require a prescription. Other over-the-counter products marketed for the relief of minor injury or arthritis pain include Absorbine Jr. Pain Relief, Excedrin Cooling Pads, and Icy Hot Patches.
In Japan Salonpas, produced by Hisamitsu Pharmaceutical, remains a popular brand. Other manufacturers, including Yutoku Pharmaceutical, SS Pharmaceutical, and Suzuki Nippondo also produce similar over-the-counter patches containing methyl salicylate or glycol salicylate.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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