Clinical recommendation	Evidence rating	References
Nasal irrigation is an effective adjunctive therapy for symptoms of chronic rhinosinusitis.	A	11, 12
Based on limited evidence, nasal irrigation may be an effective adjunctive treatment for symptoms of irritant rhinitis, allergic rhinitis, and viral upper respiratory tract infection; and for postoperative care after endoscopic sinus surgery.	B	8, 15, 16, 19–21, 23, 25
Nasal irrigation has been recommended for mild to moderate rhinitis of pregnancy, acute rhinosinusitis, sinonasal sarcoidosis, and Wegener granulomatosis.	C	24, 26, 27