Placing an injection above the brow on the outer area prevents the muscle that lifts from working. This muscle group helps pull the brow up and by injecting there, they have prevented that from happening. The muscle below the brow toward the outer area would be the correct placement to help correct a droop. That muscle pulls down and injecting there simulates a lift to the area. It takes approximately 3-6 months for the Botox to completely wear off, but I recommend going to someone who understands how the muscles work together to help improve what has been done.