Urgent Care · Common Complaints
Cough, URI, and Flu-Like Illness
Most upper respiratory infections seen in urgent care are viral and self-limited. The job is to spot pneumonia, treat influenza or COVID in high-risk patients, and avoid antibiotic overuse. This page covers the can't-miss diagnoses (pneumonia in older adults and immunocompromised, PE presenting as cough or dyspnea, pertussis, TB, COVID with hypoxia, influenza in high-risk hosts, bacterial superinfection, asthma/COPD exacerbation), red flags including SpO₂ < 92%, the minimum safe first-pass workup with rational POC testing, antibiotic stewardship using CRB-65 and clinical decision rules, antiviral candidacy for influenza and COVID, escalation criteria, documentation that justifies your antibiotic decision, and detailed return precautions. Written for NPs, PAs, and MDs in outpatient practice.
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Urgent Care · Common Complaints
Cough, URI, and Flu-Like Illness
Why this symptom matters
Most upper respiratory infections are viral and self-limited. The job is to spot pneumonia, treat influenza/COVID in high-risk patients, and avoid antibiotic overuse.
What must I not miss first?
- Pneumonia (especially in older adults, immunocompromised)
- PE presenting as cough/dyspnea
- Pertussis
- TB
- COVID with hypoxia
- Influenza in high-risk host
- Bacterial superinfection
- Asthma/COPD exacerbation
Red flags — escalate or work up urgently
- SpO₂ < 92% on room air
- RR > 24, accessory muscle use, focal crackles
- Hemoptysis
- Pleuritic chest pain with tachycardia or recent immobility
- Toxic appearance, AMS, sepsis criteria
- Persistent fever > 5 days or biphasic fever pattern
- Immunocompromised, > 65, pregnant, or significant comorbidity
Immediate Management — While You Work It Up
- Oseltamivir 75 mg BID × 5 days — if influenza confirmed or suspected within 48 hours of symptom onset. Give regardless of timing in high-risk patients including adults 65 and older.
- Albuterol inhaler — if bronchospasm or post-infectious wheeze is present.
- Benzonatate 100–200 mg TID or dextromethorphan — for cough suppression.
- Azithromycin 500 mg day 1 then 250 mg × 4 days — if atypical pneumonia suspected. Check QTc if possible before prescribing.
- Amoxicillin-clavulanate 875/125 mg BID × 5–7 days — if bacterial sinusitis criteria met: symptoms > 10 days, worsening after initial improvement, or severe symptoms with fever and facial pain.
- Antibiotics are not indicated for viral URI — document clinical reasoning if withholding in a patient who expects them.
Minimum safe first-pass workup
- What to ask: duration, fever pattern, sputum, hemoptysis, exposures, vaccination, travel, immunocompromise, smoking, asthma/COPD history
- What to examine: vitals + SpO₂ + work of breathing, lung exam (focal vs. diffuse), oropharynx, lymph nodes, mental status
- Influenza, COVID, strep testing as appropriate
- CXR if focal exam, hypoxia, age > 65, immunocompromised, or symptoms > 2 weeks
- Procalcitonin if available and antibiotic decision is unclear
What can usually be managed outpatient
- Uncomplicated viral URI: supportive care, no antibiotics
- Influenza in high-risk host: oseltamivir within 48 hr (still consider in admitted/severe beyond 48 hr)
- COVID in high-risk host: nirmatrelvir-ritonavir within 5 days if eligible
- Acute bronchitis: no antibiotics in healthy adults
- Mild CAP in healthy adult: amoxicillin or doxycycline; macrolide if local resistance is low
When to escalate to ED / higher level of care
- Hypoxia not correcting
- Sepsis criteria or toxic appearance
- Suspected PE
- Severe asthma/COPD flare not responding
- Pneumonia with high CURB-65, hemodynamic instability, or unable to tolerate PO
- Hemoptysis with abnormal vitals
What to document when the diagnosis is still uncertain
- Duration, fever pattern, exposures, vaccination status
- SpO₂, RR, lung exam findings
- "Pneumonia / PE / pertussis / TB / COVID hypoxia considered because… ruled out because…"
- Antibiotic decision and rationale (cite "viral, no abx indicated" if applicable)
- Return precautions and follow-up
Safety-net & return precautions to give
- Return or call 911 for trouble breathing, blue lips, chest pain, coughing up blood, confusion, fever > 5 days, or shaking chills.
- Hydrate, rest, antipyretics. Most viral illness improves in 7–10 days.
- Follow up in 48–72 hours if not improving or sooner if worse.
Geriatric-specific modifiers (apply on top of the above)
The guidance above applies to all adult patients seen in this setting. Layer the points below for adults 55+, geriatric (65+), and frail younger adults — they are additions, not replacements.
Cough in older adults is high-risk even when mild. It may be the first sign of pneumonia, heart failure, PE, COPD/asthma flare, aspiration, or an ACE-inhibitor side effect. Older adults frequently present with fatigue, decreased appetite, or new confusion instead of classic respiratory symptoms.
- Lower threshold for CXR in adults 55+ with any persistent cough, even without fever — older adults may be afebrile with pneumonia.
- Check SpO₂ on room air, sitting and walking if able — exertional desaturation is often the first clue.
- Heart failure mimic: consider when cough is worse lying down, with leg swelling or recent weight gain. Check BNP if available.
- Aspiration: ask about cough with meals, voice change, weight loss, or recent stroke — refer for swallow evaluation.
- Medication-induced cough: ACE inhibitors (any time after starting), inhaled steroids without rinsing (thrush).
- Antiviral candidacy is broader: oseltamivir for any adult 65+ with suspected influenza regardless of symptom duration; nirmatrelvir-ritonavir for COVID within 5 days.
- Beers-aware: avoid first-generation antihistamines (diphenhydramine) and codeine-containing cough syrups — sedation, delirium, and falls.
- Beta-blockers blunt tachycardia — a "normal" HR does not reassure.
Educational guidance for clinicians. Not a substitute for clinical judgment. Always individualize to the patient and your local resources.
Evidence sources
- · IDSA Influenza Guidelines 2018
- · CDC URI antimicrobial stewardship
- · AGS Beers Criteria
- · AGS Geriatric ED Guidelines
Review status
Last reviewed: 2026-04
Reviewed by the MyClinicianGuide editorial team. Cadence: annual.
Educational reference for licensed clinicians (NP, PA, MD, DO). Not a substitute for clinical judgment, institutional protocols, or specialty consultation. Apply in context of the full clinical picture, patient goals, and current standards of care. See About AI guidance for AI-related limitations.
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