Clavulanate component minimized by formulation choice
Penicillin allergy options
Nonanaphylactic allergy
Cefdinir PO
14 mg/kg/day once daily or divided twice daily
Maximum 600 mg per day
Cefpodoxime PO
10 mg/kg/day divided twice daily
Maximum 400 mg per day
Anaphylactic allergy
Levofloxacin PO specialist guided option
Age and weight based dosing per local pediatric references
Reserve for limited scenarios
Treatment for complications
Orbital cellulitis or abscess pathway
IV antibiotics and admission
Ampicillin-sulbactam IV
Adults 3 g every 6 hours
Pediatrics 50 mg/kg ampicillin component every 6 hours
If MRSA risk, add vancomycin IV
Weight based dosing with trough or AUC monitoring per protocol
Renal function monitoring
Surgical consideration
Subperiosteal abscess
Vision compromise
Failure to improve within 24 to 48 hours
Intracranial extension pathway
Broad-spectrum IV antibiotics and admission
Ceftriaxone IV
Adults 2 g every 12 hours
Pediatrics 50 mg/kg every 12 hours
Metronidazole IV
Adults 500 mg every 8 hours
Pediatrics 10 mg/kg every 8 hours
If MRSA risk, add vancomycin IV
Weight based dosing with monitoring
Renal function monitoring
Specialist coordination
ENT for source control
Neurosurgery for abscess evaluation
Suspected invasive fungal sinusitis pathway
Immediate ENT consultation
Nasal endoscopy and biopsy planning
Early debridement consideration
Antifungal initiation in consultation
Liposomal amphotericin B IV
Weight based dosing per institutional protocol
Renal and electrolyte monitoring
Control of hyperglycemia and ketoacidosis if present
Insulin protocol activation when indicated
Potassium monitoring
Special Populations
Pregnancy
Pregnancy considerations
Phenotype and risks
Viral predominance still expected
Avoid unnecessary antibiotics
Medication safety
Intranasal corticosteroids acceptable options
Budesonide preferred per pregnancy safety familiarity
Use lowest effective dose
Avoid doxycycline
Fetal tooth and bone effects risk
Avoid fluoroquinolones when alternatives exist
Risk benefit individualized
Antibiotic choices when indicated
Amoxicillin-clavulanate acceptable when bacterial criteria met
Standard adult dosing
Duration 5 to 7 days
Geriatric
Older adult considerations
Atypical presentation risk
Less prominent fever
More prominent fatigue and poor intake
Medication risk amplification
Anticholinergic burden with first-generation antihistamines
Decongestant cardiovascular risks
Antibiotic selection
Renal dose consideration for beta-lactams
Fluoroquinolone adverse effect susceptibility
Tendinopathy
CNS effects
Lower threshold for imaging when red flags
Orbital symptoms
Neurologic symptoms
Pediatrics
Pediatric considerations
Presentation differences
Cough prominent feature
Halitosis as clue
Supportive care safety
Avoid honey under 1 year
Avoid OTC cough and cold medications in young children per local guidance
Imaging decisions
Avoid routine CT for uncomplicated disease
Imaging for orbital or intracranial concern
Dosing safety
Weight-based dosing verification
Maximum daily dose limits
Background
Epidemiology
Population patterns
Acute rhinosinusitis frequency
Common outpatient presentation
Viral majority
Bacterial proportion
Minority of cases
Higher likelihood with criteria patterns
Typical duration
Viral improvement by 7 to 10 days
Persistent beyond 10 days raises bacterial probability
Pathophysiology
Mechanism overview
Mucosal inflammation
Ostial obstruction
Impaired mucociliary clearance
Secondary bacterial overgrowth
Retained secretions
Reduced sinus ventilation
Common bacterial organisms
Streptococcus pneumoniae
Haemophilus influenzae
Moraxella catarrhalis
Complication pathways
Lamina papyracea spread to orbit
Venous drainage spread to cavernous sinus
Frontal sinus spread intracranially
Therapeutic Considerations
Rationale for supportive therapies
Intranasal corticosteroids
Reduced mucosal edema
Improved ostial patency
Saline irrigation
Mucus clearance
Symptom relief
Antibiotic stewardship principles
Benefit greatest when bacterial criteria met
Class I recommendation, guideline consensus for criteria-based treatment
Avoid routine antibiotics for early mild illness
Duration minimization
Adult 5 to 7 day regimens when appropriate
Reassess nonresponse at 48 to 72 hours
Patient Discharge Instructions
copy discharge instructions
Discharge instructions bundle
Diagnosis framing
Sinus infection symptoms often viral early
Antibiotics used only when bacterial pattern likely
Home care
Saline rinses once to twice daily if tolerated
Intranasal steroid daily for congestion
Acetaminophen or ibuprofen for pain or fever as directed
Rest and fluids
Expected course
Improvement usually within several days
If on antibiotics, improvement expected by 48 to 72 hours
Return to emergency criteria
Eye swelling
Eye pain with movement
Double vision
Vision change
Severe headache that is new or worsening
Neck stiffness
Confusion
New weakness or numbness
Persistent fever 39.0 C or higher
Vomiting with inability to keep fluids down
Worsening symptoms after initial improvement
Follow-up plan
Primary care follow-up in 3 to 7 days if not improving
Earlier follow-up within 48 to 72 hours if worsening
ENT referral for recurrent episodes or symptoms beyond 4 weeks
References
Clinical guidelines and evidence sources
Practice guidelines
IDSA guideline for acute bacterial rhinosinusitis in children and adults
Criteria-based diagnosis
Amoxicillin-clavulanate first-line recommendation
AAO-HNS clinical practice guideline for adult sinusitis
Watchful waiting option
Imaging reserved for complications
Evidence grading tags used in this document
ACEP Level A or B tags limited by condition-specific ACEP guideline availability
ACEP Level C style tag used for expert consensus operationalization
Local protocol alignment recommended
Class I or IIa tags used as decision strength labels
Class I used for criteria-based antibiotic initiation per major society guidance
Class IIa used for supportive therapies with favorable risk benefit profile
Coding and terminology
ICD-10 codes
Acute maxillary sinusitis J01.0
Recurrent acute maxillary sinusitis J01.01
Acute frontal sinusitis J01.1
Recurrent acute frontal sinusitis J01.11
Acute ethmoidal sinusitis J01.2
Recurrent acute ethmoidal sinusitis J01.21
Acute sphenoidal sinusitis J01.3
Recurrent acute sphenoidal sinusitis J01.31
Acute pansinusitis J01.4
Recurrent acute pansinusitis J01.41
Acute sinusitis unspecified J01.90
Acute recurrent sinusitis unspecified J01.91
SNOMED CT concepts
Acute rhinosinusitis
Viral rhinosinusitis phenotype
Acute bacterial rhinosinusitis phenotype
Orbital cellulitis
Subperiosteal abscess
Orbital abscess
Cavernous sinus thrombosis
Septic thrombosis phenotype
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.