from what i can see, it's possibly because of the alcohol content. i cannot see a huge problem with it tbh. they may just be covering themselves as most drug companies do. i've had a verucca frozen off at the gp's a couple of months ago when i was 6 months. don't worry. i would deff avoid any of the treatments that contain salicylic acid as these are aspirin based, which is a no-no.