Nasarin Nasal Spray 55mcg – Allergy & Congestion ReliefNasarin Nasal Spray 55mcg 17. 5ml Corticosteroid Therapy for Nasal Congestion and Allergy Relief Nasarin Nasal Spray 55mcg 17. 5ml contains Triamcinolone Acetonide, a synthetic corticosteroid that provides powerful relief from nasal inflammation and allergic symptoms. Triamcinolone is approximately eight times more potent than prednisone, making it an effective treatment for allergic rhinitis, nasal congestion, sneezing, and sinus irritation. Although