Flu Season 2025: Get Tested & Treated Fast at Monarch Medicine Urgent Care

Fall and winter in Carmel bring more than cooler temperatures—they usher in flu season alongside surges in COVID-19, strep throat, and RSV. At Monarch Medicine, our rapid diagnostic testing delivers results in minutes so you receive the right treatment before symptoms worsen. Walk-ins are always welcome—no appointment needed.

What Is Flu Season and When Does It Peak?

According to the CDC’s FluView surveillance system, flu activity typically begins increasing in October, peaks between December and February, and can persist as late as May. In Indiana, cold winters and close indoor contact during the holidays accelerate spread—making early testing and treatment critical for faster recovery.

In our Carmel clinic, we begin seeing a meaningful increase in flu cases by late October each year. Dr. Clay recommends patients not wait to see if symptoms resolve on their own—the window for antiviral treatment is narrow.

Why Rapid Testing Matters This Flu Season

Flu, COVID-19, strep throat, and RSV share overlapping symptoms. Guessing won’t get you the right treatment—and delayed treatment has real consequences. Research cited by the CDC shows that antiviral medications like Tamiflu (oseltamivir) reduce flu duration and lower complication risk by up to 44% when started within 48 hours of symptom onset.

At Monarch Medicine, we offer comprehensive on-site rapid testing with results in minutes:

• Influenza A & B — Results in 15 minutes; Tamiflu prescribed on-site when indicated
• COVID-19 Antigen — Fast, accurate; see our dedicated COVID-19 testing page for details
• Rapid Strep Test — Antibiotics started immediately if positive
• RSV — Especially critical for infants under 12 months and adults over 60
• Mononucleosis (Mono) — For teens and young adults with persistent fatigue and sore throat

In our experience treating patients in Carmel, running a panel—rather than testing for a single illness—is often the most efficient path to the right diagnosis, especially when symptoms overlap.

Flu Symptoms vs. COVID-19 vs. Strep Throat vs. RSV

The table below reflects what Dr. Clay uses in practice to quickly differentiate these illnesses during an initial evaluation:

Per the CDC’s flu vs. cold comparison, flu almost always involves fever and body aches—which are rare with a common cold. If you’re questioning which illness you have, testing is the definitive answer.

When to Seek Urgent Care for Flu or Respiratory Illness

You should visit Monarch Medicine if you experience any of the following:

• Fever lasting more than 3 days
• Symptoms that improve then suddenly worsen
• Difficulty swallowing or severe sore throat
• Persistent vomiting or signs of dehydration
• Chest pain or persistent cough (may warrant an X-ray)
• High-risk status: pregnancy, asthma, diabetes, heart disease, or age 65+

Go directly to the ER if you have: Severe difficulty breathing, bluish lips or fingertips, confusion or inability to stay awake, or chest pain with shortness of breath. Call 911 for these symptoms—do not drive yourself.

How We Treat Flu and Respiratory Illness at Monarch Medicine

Once we identify what’s making you sick, our illness treatment services provide immediate, comprehensive care under physician supervision. Treatment options include:

• Antiviral medications — Tamiflu for influenza when within the treatment window
• Antibiotics — For confirmed bacterial infections (strep, sinusitis, pneumonia)
• Nebulizer treatments — For wheezing or difficulty breathing
• IV hydration therapy — Severe flu can cause dangerous dehydration; our on-site medical treatment includes IV fluids, which most urgent care clinics cannot offer
• Chest X-ray — Persistent cough or chest pain? Our walk-in X-ray can rule out pneumonia on the same visit, with no referral needed

Based on our experience treating patients in Carmel, we’ve found that patients who come in within the first 24–36 hours of flu symptoms respond significantly better to antiviral treatment than those who wait. Dr. Clay emphasizes: if you feel like it might be the flu, get tested today.

Flu and RSV in Children: What Carmel Parents Should Know

The American Academy of Pediatrics identifies children under 5—particularly those under 2—as being at highest risk for serious flu complications. RSV is the leading cause of infant hospitalization in the U.S. Early evaluation matters.

Our pediatric urgent care treats patients from infancy through adolescence. Dr. Clay’s family medicine background means she’s trained specifically for pediatric presentations—including recognizing when a child looks “okay” but is showing early signs of respiratory distress.

If your child is breathing rapidly, wheezing, unable to keep fluids down, or has had fever for more than 3 days, bring them in. Walk-ins always welcome.

Flu Prevention: What You Can Do Right Now

The CDC recommends annual flu vaccination for everyone 6 months and older. When well-matched to circulating strains, the flu vaccine reduces illness by 40–60% and dramatically lowers the risk of hospitalization in high-risk groups.

We offer flu shots at Monarch Medicine with no appointment needed. Walk in during any open hours and our staff can vaccinate you in minutes.

Beyond vaccination: wash hands for at least 20 seconds, avoid close contact with sick individuals, stay home if you’re symptomatic, cover coughs with your elbow, and disinfect high-touch surfaces regularly.

Why Choose Monarch Medicine for Flu Season Care

Monarch Medicine is physician-led—Dr. Lisa Clay, MD, FAAFP brings nearly two decades of clinical experience to every patient encounter. Unlike urgent care chains staffed primarily by nurse practitioners, you’re seen by a board-certified family physician who can handle complex presentations, manage high-risk patients, and make nuanced treatment decisions on the spot.

We’re open 7 days a week, offer transparent self-pay pricing (~$150 for new patients), accept most major insurance plans, and have on-site X-ray, IV hydration, and a full rapid test panel under one roof.

Walk In Today — No Appointment Needed

Don’t let flu season slow you down. Check in online to reduce your wait, or simply walk in. We’re located at 90 Executive Drive, Suite A, Carmel, IN 46032.

Hours: Mon–Fri 8am–6pm · Sat–Sun 9am–12pm
Phone: (317) 804-4203

Frequently Asked Questions

Can I get tested for flu and COVID at the same visit?

Yes. We can run flu A/B, COVID-19, strep, RSV, and mono testing in a single visit. This is the most efficient way to get a confirmed diagnosis and start the right treatment.

How effective is the flu vaccine?

When well-matched to circulating strains, the CDC estimates 40–60% effectiveness at preventing illness. Even when it doesn’t fully prevent infection, it significantly reduces severity and the risk of hospitalization.

What happens if I wait too long to treat the flu?

Serious complications include pneumonia, bronchitis, sinus infections, dehydration, and worsening of chronic conditions like asthma or heart disease. High-risk patients can deteriorate quickly—early evaluation is always the right call.

Is urgent care or the ER better for flu symptoms?

For the vast majority of flu and respiratory illness cases, urgent care is faster, more affordable, and clinically appropriate. Reserve the ER for life-threatening emergencies: severe breathing difficulty, chest pain, or altered mental status.

Does Monarch Medicine treat children with the flu?

Yes—we treat patients from infancy through adulthood. Our physician has specific family medicine training in pediatric respiratory illness evaluation and treatment.

Feeling sick? Visit our cold & flu treatment page for walk-in rapid flu testing and same-day care.

Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider for diagnosis and treatment of medical conditions. If you are experiencing a medical emergency, call 911 immediately.

Last medically reviewed by Dr. Lisa Clay, MD, FAAFP on February 19, 2026.