NEW : Two vials of Demerol appeared to have been tampered with , regulatory group says . NEW : Dentist had been through drug rehab , group 's attorney says . Comment: The first lawsuit against an Oklahoma dentist whose patients may have been exposed to HIV is filed .
NEW : Two vials of Demerol appeared to have been tampered with , regulatory group says . NEW : Dentist had been through drug rehab , group 's attorney says . Arkansas health officials say a dentist may have given patients contaminated drugs . The first lawsuit against an Oklahoma dentist whose patients may have been exposed to HIV is filed .