Topical is actually more effective for those specific goals because of direct tissue contact
1 2 US3091569A, Sheffner AL, "Mucolytic-nu-acylated sulfhydryl compositions and process for treating animal mucus", issued 28 May 1963 Archived 6 August 2024 at the Wayback Machine US patent 3091569, Sheffner AL, "Mucolytic- N -acylated sulfhydryl compositions and process for treating animal mucus", published 28 May 1963, issued 28 May 1963, assigned to Mead Johnson & Co and Mead Johnson & Company Archived 30 June 2024 at the Wayback Machine The selection and use of essential medicines 2023: web annex A: World Health Organization model list of essential medicines: 23rd list (2023)
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Eur J Pharm Sci (2019) 128:10311
Post-inflammatory discoloration after a cold sore may fade over several months, but established hyperpigmentation from UV, smoking, or hormonal causes requires a structured protocol
