Your doctor is just making a redhead joking and having mad lulz in his head cuz he just picked on you for red hair. Scientifically there is no reason why a ginger wouldnt be able to digest hydrodone any less efficiently than a normal person. You sir are just a pussy.
I have brown hair and freckles and i take hydrocodone like its fucking skittles. But adderal does seem to effect me more than the average person, but thats prolly cuz i only weigh a buck 43.