How long does it take to lower blood sugar?

Depends : Hi. Let's assume you're talking about a diabetic with high blood sugar. It depends on what you use to lower it! IV insulin can lower high blood sugar quite quickly. Subcutaneous insulin much slower, but respectable nonetheless. For type 2's, pills are very, very slow, if effective at all for very high sugars. Many variables.

Depends: Depends on what you're using to lower the blood sugar. With insulin, you can lower blood sugars within minutes.