What to do if i'm facing dark urine problem, is this due to the use of lortab medicine?

Not necessarily: Dehydration, liver problems, gallbladder problems, blood disorders & a myriad other things can cause this.Opiates like lortab can overtax an already damaged liver & exacerbate the problem, but likely there is an underlying disorder.A good history & physical exam & likely urine & blood tests & imaging like ultrasound/CT of liver may be needed to find cause & determine appropriate treatment