Your doctor told you that Kolopin lasted for 12 hour should you report him for the lie since it only last for six?

Are you talking about Kolonopin? Everyones body metabolizes things differently. So the affects may last longer in someone that has a slow metabolism and affect you for a shorter time if your body metabolizes things at a fast rate. It's called practicing medicine because it's a "practice"! No doctor can say with %100 accuracy "exactly" how long any drug will last in any specific person.