Sounds similar to schools that only look at your last 2 years or last 60 units, but that isn't referred to as academic forgiveness. It's more like a "what have you done for me lately" type of deal. SJSU looks at last 60 and I believe UWashington only looks at your last 2 years also.
Most schools will take your last 5 years much more seriously. Grade trend is also important. No school wants to look at your more recent grades, compare them to your older grades, and come to the conclusion that you were once an excellent student that fell into mediocrity. It's good to start at mediocrity at stay there!
Edit: If you retake a prerequisite OT class like Anatomy, the vast majority of schools will consider the better grade, at least most of the schools I've checked with.