The Sandoz patches supposedly release 10mcg/hour and are supposed to be worn for 7 days. However, the leaflet also states that they contain a total of 10mg. This doesnt quite make sense to me. There are 24 hours in a day, so if you wear it for 7 days as intructed, that's 168 hours, which at 10 mcg / hour comes out to a total of 1680 mcg, or 1.68mg, being released over that period. But why does it then also state that the patch contains a total of 10mg? That would mean that it still has 8.32mg left after 7 days when you throw it away??