Important Note: Making this solution at home is not recommended for medical use. Commercial Betadine is safer and more reliable. The information below is for educational purposes only.
Method One: Diluting a Stronger Solution
This is the easiest way. You start with a 10% Povidone-Iodine solution and mix it with sterile water or saline.
For a 5% solution, mix equal parts of 10% Povidone-Iodine and sterile water. For example, mix one spoon of Povidone-Iodine with one spoon of water.
For a 2.5% solution, mix one part Povidone-Iodine with three parts sterile water. For example, one spoon of Povidone-Iodine and three spoons of water.
For a weak solution used for washing wounds, add a small amount of 10% Povidone-Iodine to a large amount of saline. This is usually one part Povidone-Iodine to about twenty-eight parts water.
Method Two: Making from Powder
This method is only for pharmacies and laboratories. You need Povidone-Iodine powder, citric acid, and distilled water.
First, warm the distilled water. It should be warm but not too hot. Then add a small amount of citric acid. This is important because the solution needs the right acidity to stay stable.
Slowly add the Povidone-Iodine powder while stirring continuously. The powder clumps easily, so you must stir well. Keep stirring until the powder is fully dissolved and the liquid is dark brown.
How to Store the Solution
Keep the solution in a closed container away from light. Glass bottles work better than plastic because iodine can stain plastic. Store it at room temperature. Do not put it in the fridge.
If made correctly, the solution can last up to one year.
How to Know If It Has Gone Bad
Povidone-Iodine should always be dark brown. If the solution becomes clear or light yellow, it is no longer effective. Throw it away immediately.
Important Safety Warnings
Do not swallow this solution. Do not use it on deep wounds, animal bites, or large burns. Do not use it if you are allergic to iodine. Do not heat the solution above sixty degrees Celsius. Keep it away from children.
Final Advice
Making your own antiseptic is difficult and risky. Commercial products like Betadine are tested, clean, and safe. Unless you are a pharmacist or doctor, it is better to buy a re
ady-made solution from the pharmacy.