Since your allergy causes breathing difficulty alongside sneezing and coughing, you typically require a dual approach. For quick relief of breathing issues, a rescue bronchodilator inhaler (like Albuterol) is usually prescribed. To control daily allergy symptoms like sneezing, non-drowsy antihistamines (such as Cetirizine or Loratadine) are highly effective, sometimes combined with a controller medication like Montelukast. Because difficulty breathing can be serious, please do not self-medicate. You must consult your diagnosing doctor to get a personalised prescription and action plan. Seek emergency care immediately if you experience severe shortness of breath.