Hello, yoopergal, it may have been my post that you read about using Tincture of Benzoin. In any case, to begin with, the first times I used this method, I had single use packets given to me by an ER doctor who was the person who first used it on me. I couldn't find a source for those other than buying in great quantity so I bought little bottles. I did not see the warning you are talking about and I wonder if subsequent procedures refers to surgical procedures. As my ostomy had healed somewhat, and since I only applied the tincture to my cleaned skin around the opening and the disc and not to the wound itself, and the fact that it was recommended by the ER doctor, I was confident that it was a safe usage. Also, be sure to secure the cap after use as the tincture will dry up quickly when exposed to the air. Also, FYI, protect every surface when you use it. It will permanently stain almost anything it comes into contact with. Good luck to you!