Initial Treatment for Chronic Rhinosinusitis in Adults
The recommended initial treatment for an adult with chronic rhinosinusitis is daily high-volume saline nasal irrigation combined with topical intranasal corticosteroids. 1
First-Line Medical Therapy
Core Treatment Components
Saline nasal irrigation (either physiologic or hypertonic) should be used daily for symptomatic relief and to enhance mucociliary clearance 1, 2
Topical intranasal corticosteroids should be prescribed concurrently as first-line maintenance therapy 1, 2
Critical Diagnostic Confirmation
Before initiating treatment, you must confirm the diagnosis with objective documentation of sinonasal inflammation using anterior rhinoscopy, nasal endoscopy, or computed tomography 1. This is a strong recommendation from the American Academy of Otolaryngology-Head and Neck Surgery 1.
The diagnosis requires at least two of four cardinal symptoms present for ≥12 consecutive weeks: 1
- Facial pain/pressure
- Hyposmia/anosmia
- Nasal drainage
- Nasal obstruction
Assessment for Modifying Factors
You should assess for chronic conditions that modify management: 1
- Asthma (particularly important in CRS with nasal polyps)
- Cystic fibrosis
- Immunocompromised state
- Ciliary dyskinesia
Consider testing for allergy and immune function in selected patients 1.
When NOT to Use Antibiotics
Do not prescribe antibacterial therapy if significant or persistent purulent nasal discharge (anterior, posterior, or both) is absent on examination 1. This is a strong recommendation from the 2025 surgical management guideline 1.
Chronic rhinosinusitis is not primarily an infectious problem, and routine antibiotic use is not indicated in the absence of purulent discharge 3.
Additional Considerations for Specific Subtypes
CRS with Nasal Polyps
- Confirm the presence or absence of nasal polyps on examination 1
- Short-course systemic corticosteroids (1-3 weeks) may be considered for patients with polyps, as they reduce polyp size for up to 3 months after treatment (P < .001) 2
- Leukotriene antagonists may improve nasal symptoms compared to placebo in patients with nasal polyps (P < .01) 2
- A 3-week course of doxycycline may be considered for polyp reduction 2
CRS without Nasal Polyps
- A prolonged course (3 months) of macrolide antibiotic may be considered, as it improves quality of life at 24 weeks after therapy (SMD, -0.43 [95% CI, -0.82 to -0.05]) 2
What NOT to Use
Do not prescribe topical or systemic antifungal therapy for patients with CRS 1. This is a recommendation against therapy from multiple guidelines.
Common Pitfalls to Avoid
- Avoid requiring a predefined, one-size-fits-all regimen or specific duration of medical therapy before considering other management options 1
- Do not obtain CT imaging for initial diagnosis unless complications are suspected or you are planning surgical intervention 1
- Do not prescribe antibiotics without evidence of purulent discharge on examination 1
- Recognize that CRS is a chronic inflammatory condition, not an acute infection requiring immediate antibiotics 4, 3
When to Refer
Refer to an otolaryngologist if: 4
- First-line medical therapy fails after an adequate trial
- Complications are suspected
- Patient has refractory disease despite appropriate medical management
- Consideration for endoscopic sinus surgery is needed
Selected patients with suggestive history may benefit from referral to an allergist or pulmonologist for evaluation of comorbidities 4.