Same-Day Care
Flu Treatment in Berkeley Heights, NJ
Body aches, fever, exhaustion — flu hits fast. We test, diagnose, and start treatment in a single visit. Antivirals work best within 48 hours of symptoms.
Get treated today, not next week
Influenza is one of the most common reasons people visit urgent care in winter. The hallmark — sudden fever, body aches, exhaustion, headache, cough — usually develops within hours rather than days, and many patients describe feeling fine in the morning and bedridden by evening. Early treatment matters because antiviral medications like oseltamivir (Tamiflu) work best when started within 48 hours of the first symptom.
At Sage Urgent Care we test for flu on-site with a rapid molecular swab, evaluate your symptoms, screen for complications like pneumonia or dehydration, and start treatment in the same visit. Most patients are in and out in under an hour.
When to come in for flu symptoms
- Sudden fever (often 101°F or higher) with body aches
- Severe fatigue and weakness — feeling like you can't get out of bed
- Dry cough that started suddenly
- Headache, sore throat, and chills
- Symptoms within the first 48 hours — antivirals are most effective early
- You're in a higher-risk group (over 65, pregnant, asthma, diabetes, immunocompromised)
- You need a doctor's note for work or school
What flu treatment looks like
- Rapid flu test. A nasal swab that returns results in about 15 minutes. We can also test for COVID-19 and RSV from the same swab if your symptoms could fit any of them.
- Antiviral medication when appropriate. Tamiflu (oseltamivir) reduces the duration and severity of flu by about a day on average when started within 48 hours. It's prescribed based on your symptom timing, age, and risk factors.
- Symptom management. Prescription-strength options for cough, congestion, and fever when over-the-counter medications aren't enough.
- Hydration support. If you're dehydrated, we can give IV fluids on-site rather than sending you to the ER.
- Return-to-work or school note. Signed documentation for employers and schools.
What happens at your visit
- Quick intake. When did symptoms start? Are you in a high-risk group? Any chronic conditions?
- Provider evaluation. Vitals, lung exam, oxygen check, and assessment for complications.
- Rapid testing. A short nasal swab. Results in about 15 minutes — often before the exam is even finished.
- Treatment plan. If positive and within the antiviral window, you'll get a Tamiflu prescription sent to your pharmacy. We discuss isolation, hydration, and warning signs to watch for.
- Documentation. Work or school note provided on request.
Why Sage for flu treatment
Rapid same-visit testing
Results in 15 minutes for flu, COVID, and RSV — often from the same swab. No follow-up trip required.
Antivirals when they help
Our providers prescribe Tamiflu based on current clinical guidelines and your individual risk — not by default for everyone, but when it will actually reduce your symptoms.
Open 7 days, 8 AM to 8 PM
Flu doesn't time itself to office hours. Walk in any day, including weekends.
Faster and cheaper than the ER
For routine flu, an ER visit costs ten times more and takes three times longer. Urgent care is purpose-built for exactly this.
Flu Treatment FAQs
Without testing, it's almost impossible to tell — the symptoms overlap heavily. We offer a combined respiratory swab that tests for all three at once, so you get a clear answer in about 15 minutes.
It depends on when your symptoms started, your age, and whether you're in a high-risk group. Tamiflu is most effective within 48 hours of symptom onset. After that window, the benefit drops significantly. Our provider will recommend it if it's likely to help you, and explain why if it isn't.
Adults are typically contagious from the day before symptoms start until about 5–7 days after. Children and people with weak immune systems may shed virus longer. Stay home until you've been fever-free for 24 hours without medication.
No. Flu treatment at Sage Urgent Care is walk-in, 7 days a week, 8 AM to 8 PM. Same-day care, no scheduling required.
Yes. We accept Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, Horizon BCBS NJ, Medicare, NJ FamilyCare, Humana, and Oxford. Most plans cover urgent care visits with a copay. Self-pay rates are available and transparent.
A flu shot is given before you're exposed to help prevent infection. Flu treatment is what you need when you already have symptoms. We offer both — the shot in the fall before flu season ramps up, and treatment year-round when patients come in sick.
Yes. Oseltamivir is approved for children 2 weeks and older and is available as a liquid suspension for those who can't swallow pills. Our pediatric-experienced providers will weigh whether it makes sense for your child based on age, symptom timing, and risk factors.
A negative flu test doesn't mean you're not sick — it could be COVID, RSV, another virus, or a bacterial infection. Our provider will examine you, consider your full picture, and recommend the right next step. We won't send you out the door without a plan.
Yes. Just let our staff know at check-in. We'll provide signed documentation with the days you should stay home.
Related care at Sage
Other services frequently relevant for patients here:
We also serve patients from Millburn, Mountainside, Scotch Plains, Short Hills, Springfield, Stirling, and other surrounding towns.
Feel awful? Walk in today
Sage Urgent Care is open every day, 8 AM to 8 PM. Walk in for same-day flu testing and treatment — antivirals work best when started early.
This article is for general information only and is not a substitute for professional medical advice. If you have concerns about a medical condition, see a qualified healthcare provider.
Authoritative sources: CDC: Flu Treatment, CDC: Influenza Antiviral Drugs.