Just been prescribed Nitrofurantoin for Urine Infection. Is this compatible with Levo. Don't feel as though I have an infection, but since I spoke to GP this morning I have what could possible be tonsillitis coming. Have not had this for 40 years. Don't know whether this is a Quinolone, Sulphonamide or Micin, which I know we shouldn't have. I would welcome some advice please.