COLD KIT – 4 or Ambroxol + Levocetirizine + Paracetamol + Phenylephrine is a combination of three medicines: Ambroxol, Levocetirizine, Paracetamol and Phenylephrine, which relieves common cold symptoms. Ambroxol is a mucolytic which thins and loosens mucus (phlegm), making it easier to cough out.