When Antibiotics Help — and When They Don’t: Adult Urgent Care Guide

Are you dealing with a fever, sore throat, sinus pressure, or a lingering cough? One of the most common questions adults ask is: Do I need antibiotics?

The answer depends on the cause of your illness. Antibiotics treat bacterial infections, but they won’t help viral illnesses like colds, Covid, or the flu. According to the Centers for Disease Control and Prevention, unnecessary antibiotic use contributes to growing antibiotic resistance and avoidable side effects.

Understanding when antibiotics are needed can help you recover faster—and avoid unnecessary treatment. At TrustCare Adult Urgent Care, we make it easy to get the right diagnosis quickly.

Viral vs. Bacterial Infections in Adults

Most illnesses fall into two categories:

1. Viral Infections (Do NOT Require Antibiotics)

• Common cold
• Influenza (flu)
• Most bronchitis
• Most sore throats
• Most sinus infections

Antibiotics do not work on viruses. The Mayo Clinic recommends rest, hydration, and symptom management for viral illnesses.

2. Bacterial Infections (May Require Antibiotics)

• Strep throat
• Certain sinus infections
• Urinary tract infections (UTIs)
• Bacterial pneumonia
• Skin infections like cellulitis

Because symptoms often overlap, accurate diagnosis is essential—especially in urgent care settings.

The Problem: Why Antibiotics Are Often Overprescribed

Antibiotics are sometimes prescribed “just in case” because it’s difficult to quickly determine the cause of infection. The truth is that it’s almost completely indistinguishable. Both can give you fever, sore throat, body aches ,etc. The result: millions of prescriptions written for infections that antibiotics simply can’t treat. Traditional testing methods can be:

• Slow to deliver results
• Inconclusive
• Unable to detect certain pathogens
• Limited depending on infection location

The World Health Organization identifies antibiotic resistance as one of the biggest global health threats—often driven by misuse and overprescribing.

But antibiotics are safe, aren’t they?

Antibiotics are one of medicine’s greatest discoveries of our century. Penicillin, was the first antibiotic discovered in 1928 by Dr. Alexander Fleming and was a pivotal breakthrough. But even in his 1940 Nobel prize speech, he warned that misuse of this wonderful tool will lead to resistance. And he was right.

Antibiotic resistance(AMR) affects nearly 2.8 million Americans annually and that number continues to rise. Resistance to an antibiotic means long hospital stays and can even lead to death. A Lancet study published in 2024 predicts that AMR will affect 170 billion lives by 2050 if we don’t make a change today.

How does unnecessary antibiotic use lead to resistance?

When you take an antibiotic unnecessarily, it doesn't just fail to help — it reduces the beneficial bacteria your body depends on, allowing resistant strains to survive and multiply. These good bacteria help keep your body balanced and protect you from harmful germs. When those helpful bacteria are reduced, stronger bacteria that survive the antibiotic can grow and multiply. Over time, this makes antibiotics less effective when you truly need them.

Fun Fact: your gut bacteria also help control how your body uses food. When they’re out of balance, your body may store more fat and feel hungrier!

Exclusive to TrustCare: Rapid MeMed BV® Testing

TrustCare is the only provider in the area offering MeMed BV® testing—a breakthrough diagnostic used by leading institutions such as Johns Hopkins and Texas Childen’s Hospital.

MeMed BV® is an FDA-cleared rapid diagnostic test that uses your body’s immune response to identify infection type.

How It Works

• Small blood sample
• Measures 3 biomarkers: TRAIL, IP-10, and CRP
• Uses machine learning to analyze immune responses
• Provides a clear result: bacterial or viral in just 15 minutes

No waiting. No guessing. Just fast, accurate answers when treatment decisions matter most. So TrustCare providers prescribe antibiotics only when they are truly needed.

Why MeMed BV® Matters for Your Care

Whether you're dealing with a fever, sore throat, sinus infection, or respiratory illness, TrustCare providers use MeMed BV® to take the guesswork out of your diagnosis — and get you the right treatment faster.

Fever in Adults: When to Seek Urgent Care

Fever is a natural immune response. Mild fevers can often be treated at home.

Visit urgent care if you experience:

• Fever of 102°F or higher
• Fever lasting more than 3 days
• Shortness of breath, confusion, or dehydration
• Severe or worsening symptoms