I take some pain med's but have gained over 100 pd's in the past couple of years and need some help to loose the weight. I take a Urine Drug Screen monthly and want to know how long the will be in my system before I take my drug screen. Even though I can get this without a script I want to make sure I don't get my other med's cut out. So if someone could Please help me out with this question it would be appreciated. Thanks!