For immediate relief from a runny nose, over-the-counter antihistamines like Cetirizine or Loratadine can help, along with saline nasal sprays to clear congestion. However, because your symptoms are recurrent, they may be caused by allergies (allergic rhinitis) or chronic sinusitis rather than repeated common colds. I highly recommend consulting a doctor or allergist for a proper diagnosis. Avoid using over-the-counter decongestant nasal sprays for more than three consecutive days, as they can cause rebound congestion. A healthcare professional can help identify the root cause and prescribe targeted treatment.