Strep throat is treated with antibiotics, typically a 10-day course of penicillin or amoxicillin. Unlike a viral sore throat, strep is a bacterial infection that won’t resolve on its own and can lead to serious complications if left untreated. The good news: most people start feeling noticeably better within two to three days of their first antibiotic dose.
Getting the Right Diagnosis First
Not every sore throat is strep. In fact, most sore throats are caused by viruses, which antibiotics can’t treat. The hallmarks of strep include sudden, severe throat pain, fever, swollen lymph nodes in the neck, and white patches or redness on the tonsils. Strep typically does not come with a cough, runny nose, or hoarseness, which point more toward a viral cause.
Doctors use a rapid strep test (a quick throat swab) to confirm the diagnosis. These tests catch about 86% of true strep cases and are correct when positive about 96% of the time. If a rapid test comes back negative but your symptoms strongly suggest strep, your provider may send a throat culture, which takes one to two days but is more reliable. Starting antibiotics before culture results come back is sometimes appropriate based on the clinical picture.
Antibiotics: The Core Treatment
Penicillin and amoxicillin remain the first-choice antibiotics for strep throat. Group A Streptococcus, the bacterium that causes the infection, has never developed resistance to penicillin, making it consistently effective. A standard course lasts 10 days. Even though you’ll feel better much sooner, finishing the entire course matters. Stopping early increases the chance of the infection coming back and raises the risk of complications.
If you have a penicillin allergy, your provider has several alternatives. For mild allergies (a rash, for example), certain first-generation antibiotics in a related drug class can be used safely. For more severe allergies, options include clindamycin or macrolide antibiotics like azithromycin or clarithromycin. One important caveat: resistance to macrolides and clindamycin has been climbing. Among invasive Group A Strep samples tested in 2023, roughly 27% were resistant to macrolides and 26% to clindamycin. That doesn’t mean these drugs won’t work for a typical throat infection, but it’s worth knowing that your provider may choose one option over another based on local resistance patterns.
What to Expect During Recovery
Most people notice real improvement within 48 to 72 hours of starting antibiotics. Fever typically breaks first, followed by gradual improvement in throat pain and swelling. You’re generally no longer contagious after the first 24 to 48 hours of treatment, and you can return to work or school once you’ve been fever-free for at least 24 hours after your first dose.
If your symptoms haven’t improved at all after three days of antibiotics, contact your provider. This could signal a resistant strain, an incorrect diagnosis, or a complication like a peritonsillar abscess.
Managing Pain While Antibiotics Work
Antibiotics kill the bacteria, but they don’t provide immediate pain relief. Over-the-counter pain relievers like ibuprofen and acetaminophen are effective for both throat pain and fever. Avoid giving aspirin to children or teenagers, as it has been linked to Reye’s syndrome, a rare but dangerous condition.
Several simple home strategies also help:
- Salt water gargle. Mix about 1/4 teaspoon of table salt in 8 ounces of warm water and gargle several times a day. This reduces swelling and loosens mucus.
- Cold foods. Frozen yogurt, sherbet, and ice pops soothe inflamed tissue and make eating less painful.
- Plenty of fluids. Staying hydrated keeps the throat moist and makes swallowing easier. Warm broths, water, and herbal teas all work well.
- Rest. Sleep gives your immune system the energy it needs to fight the infection alongside antibiotics.
Avoid orange juice and other acidic or spicy foods, which can intensify throat pain. Cigarette smoke and strong fumes from paint or cleaning products can also irritate already inflamed tissue.
Why Treatment Matters: Possible Complications
Left untreated, strep throat can trigger rheumatic fever, an inflammatory condition that can develop one to five weeks after the initial infection. Rheumatic fever can damage the heart valves permanently if it isn’t caught and treated promptly. It can also cause joint pain, skin rashes, and involuntary movements. Another possible complication is post-streptococcal kidney inflammation, which usually appears one to two weeks after the throat infection.
These complications are uncommon in people who receive proper antibiotic treatment, which is the main reason strep throat requires a prescription rather than just home care. Antibiotics shorten the illness, reduce the spread to others, and dramatically lower the risk of these serious downstream problems.
Dealing With Recurring Strep Infections
Some people, especially children, seem to get strep throat repeatedly. A few practical steps can reduce reinfection: replace your toothbrush after you start antibiotics, avoid sharing cups and utensils, and wash hands frequently during strep season (late fall through early spring).
If infections keep coming back despite these precautions, tonsil removal may become an option. The general thresholds providers use are seven or more episodes in a single year, five or more per year for two consecutive years, or three or more per year for three consecutive years. Tonsillectomy doesn’t guarantee strep will never return (the bacteria can still infect other throat tissue), but it significantly reduces the frequency and severity of episodes in people who meet these criteria.