Can I use red medicine water after applying iodophor antiseptic solution on a wound with abrasion and broken skin?

Generally, after applying iodophor antiseptic solution to a wound with skin abrasion, it is not recommended to use red medicine water (merbromin solution) afterward. Detailed explanation is as follows:

In wound management, if iodophor has already been used, red medicine water should not be applied. Iodophor is a commonly used disinfectant suitable for disinfection of skin and mucous membranes. It has broad-spectrum antimicrobial properties and causes minimal skin irritation. Red medicine water refers to a solution of merbromin. Although it also acts as a disinfectant and antiseptic, its antibacterial effect is relatively weaker. Moreover, it contains organic mercury compounds, and improper use may lead to mercury poisoning.

When merbromin solution and iodophor are used together, a chemical reaction occurs between them, forming mercuric iodide. Mercuric iodide is a highly toxic substance that can cause intense irritation to the skin, mucous membranes, and other tissues, potentially leading to skin damage and mucosal ulcers. Once absorbed into the body, mercuric iodide may induce gingivitis, and in patients with heart conditions, it could even lead to heart failure. If further wound treatment is needed, appropriate medications or treatment methods can be selected following medical advice after disinfecting with iodophor.

It is important to maintain cleanliness and hygiene of the wound in daily life and avoid contact with water to prevent bacterial infection. If symptoms such as redness, swelling, or increased pain develop at the wound site, prompt medical attention should be sought.