Laz 250 (Azithromycin) is an antibiotic. Most sudden sore throats are viral, meaning antibiotics will not help. Even if it is a bacterial infection, one day is too soon to see full relief. For immediate comfort, try warm salt water gargles 3-4 times daily and use throat lozenges. You can take an over-the-counter pain reliever like Paracetamol or Ibuprofen for the pain. Please avoid self-prescribing antibiotics to prevent resistance. If symptoms persist beyond three days, or you develop a high fever, consult a doctor for a proper evaluation.