Management of Acute Bacterial Sinusitis in Children with Amoxicillin Allergy

Antibiotic Selection Based on Allergy Severity

For children with a non‑severe penicillin allergy (e.g., isolated rash or mild gastrointestinal upset), second‑ or third‑generation cephalosporins such as cefdinir, cefpodoxime, or cefuroxime axetil are recommended as first‑line alternatives because they provide reliable coverage of Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis and have a low cross‑reactivity rate (≈1–3 %) with penicillins【1】.
For children with a severe penicillin allergy (anaphylaxis, Stevens‑Johnson syndrome, toxic epidermal necrolysis, DRESS, or AGEP), macrolides (clarithromycin or azithromycin) are the recommended alternatives despite higher rates of S. pneumoniae resistance; beta‑lactams, including cephalosporins, should be avoided【1】.

Pediatric patients should receive 10–14 days of antibiotic therapy for acute bacterial sinusitis, which is longer than the 5–7 day course advised for adults【1】.
Therapy should continue for at least 48–72 hours after clinical symptoms have resolved to ensure eradication of the infection【1】.

Persistent symptoms – nasal discharge or daytime cough lasting ≥10 days without improvement【2】.
Severe symptoms – fever ≥39 °C for ≥3 consecutive days together with thick, colored nasal discharge【2】.
Worsening symptoms – initial improvement after a viral upper‑respiratory infection followed by new fever ≥38 °C or increased cough/nasal discharge【2】【3】.

Inappropriate macrolide use – macrolides are prescribed in roughly 25 % of acute sinusitis cases despite guideline recommendations against them because of high S. pneumoniae resistance; they should be reserved for documented severe beta‑lactam allergy【1】.
Excessive treatment duration – about 75 % of prescriptions exceed the recommended 10–14 day course, increasing the risk of resistance and adverse effects; adherence to the recommended duration is essential【1】.
Use of fluoroquinolones – levofloxacin and moxifloxacin are not recommended for pediatric sinusitis due to musculoskeletal safety concerns【1】.

Intranasal corticosteroids may improve outcomes, especially in children who also have allergic rhinitis【4】【5】【1】.
Saline nasal irrigation (non‑spray), when combined with antibiotics, has shown clinical improvement in pediatric studies【5】.
Antihistamines are not indicated as primary therapy for sinusitis, though they can be used to manage concurrent allergic symptoms in atopic children【2】【4】.