I have a friend of mine who has been on a number of prescription medications for the past 10 years, and for some reason got pulled over on a random check stop or what ever you call it. Cars were pulled over and lined up. A cheek swab was done and positive came up for narcotics. He is not impaired in any way, and takes his medication as prescribed and follows the doctors orders. He is now having to get a lawyer and shell out cash on this.
I have just never heard of this. Maybe for illicit drug use, or drinking, but for taking your regular medications?