You can combine several lower dose patches at the same time to get your usual dose. So if you are usually on 100mcg, you can use x1 25mcg alongside x1 75mcg simultaneously. However – since Pharmac only fund two patches per week of the same strength at present, then the pharmacy will likely charge you for the extra patches if you receive duplicate patches of the same strength (eg. x2 50mcg patches to make a dose of 100mcg). If you receive two different strength patches (eg. x1 25mcg patch and x1 50mcg patch) then you should not have any extra charges