Strep throat requires antibiotics to fully clear the infection. Unlike a regular sore throat caused by a virus, strep is a bacterial infection that won’t resolve reliably on its own, and leaving it untreated carries real risks. The good news: most people feel noticeably better within one to two days of starting medication, and you stop being contagious after just 24 hours on antibiotics.
Antibiotics Are the Primary Treatment
Amoxicillin and penicillin are the first-choice antibiotics for strep throat. Both are inexpensive, effective, and well-tolerated. The standard course is 10 days, and finishing every dose matters even after you feel better. Stopping early gives surviving bacteria a chance to rebound, which can lead to a harder-to-treat recurrence or, in rare cases, complications.
If you’re allergic to penicillin, your doctor has several alternatives. These include certain antibiotics in the cephalosporin family (a related but often tolerated class) as well as options like azithromycin, which uses a shorter five-day course, or clindamycin, which runs the full 10 days. Your doctor will choose based on the type of allergy you have, since some penicillin allergies rule out the cephalosporin options too.
In some situations, particularly when a person is unlikely to finish a full oral course, a single injection of penicillin can treat the infection in one visit. This is more common in children or in clinical settings where follow-through is a concern.
Pain Relief While You Wait for Antibiotics to Work
Antibiotics kill the bacteria, but they don’t do much for the raw, swollen feeling in your throat during the first day or two. Over-the-counter pain relievers bridge that gap effectively. Ibuprofen is particularly useful because it reduces both pain and inflammation. In adults, studies show it can cut throat pain by 32 to 80% within two to four hours, and by about 70% at six hours. Acetaminophen (Tylenol) also helps with pain and fever, though it doesn’t target inflammation the way ibuprofen does. Either is a reasonable choice, and you can alternate between the two if one alone isn’t enough.
Beyond medication, a few simple habits make a noticeable difference. Warm liquids like broth or tea with honey soothe irritated tissue. Cold items like ice pops or cold water can numb the throat temporarily. Saltwater gargles (about half a teaspoon of salt in a cup of warm water) reduce swelling in the short term. Staying hydrated is important because fever and reduced appetite can quietly push you toward dehydration, which makes throat pain feel worse.
How Doctors Confirm It’s Strep
Not every painful sore throat is strep. In fact, most sore throats are caused by viruses and don’t need antibiotics at all. Doctors look for a specific cluster of signs to decide whether testing is warranted: a fever of 38°C (100.4°F) or higher, swollen or pus-covered tonsils, tender lymph nodes at the front of the neck, and the absence of a cough. The more of these you have, the more likely strep becomes. A score of three or four out of four typically triggers a rapid strep test or throat culture.
The rapid test takes about five to ten minutes and catches most cases. If it comes back negative but your doctor still suspects strep, a throat culture (which takes one to two days) provides a more definitive answer. This step is especially common in children, where missing a strep diagnosis carries greater long-term risk.
When You Can Return to Normal Activities
You’re contagious from the time symptoms start until you’ve been on antibiotics for at least 24 hours. After that window, you can return to work or school as long as you feel up to it. Most people notice a significant drop in fever and throat pain within 48 to 72 hours of starting treatment, though mild soreness can linger for a few more days.
If you’re not improving after two to three days on antibiotics, contact your doctor. It could mean the particular strain is resistant to your medication, or it could indicate a different diagnosis altogether, like a peritonsillar abscess (a pocket of infection near the tonsil that needs separate treatment).
What Happens If Strep Goes Untreated
Most untreated strep infections do eventually clear on their own, but leaving them to run their course introduces unnecessary risk. Rheumatic fever, a condition that can damage the heart valves, is the most serious potential complication. It’s rare in developed countries thanks to widespread antibiotic use, but it still occurs. A kidney condition called post-streptococcal glomerulonephritis can develop about 10 days after strep symptoms begin. Most people who develop it recover within a few weeks, though in rare cases, particularly in adults, it can cause lasting kidney damage.
These complications are the core reason doctors treat strep aggressively even when symptoms seem manageable. Antibiotics don’t just speed up your recovery. They dramatically reduce the chance of these downstream problems.
Recurring Strep Throat
Some people get strep repeatedly, sometimes multiple times a year. Recurrence can happen because the bacteria persist in the tonsils despite treatment, because of reinfection from a close contact (a family member or partner who carries the bacteria without symptoms), or because of incomplete antibiotic courses.
If recurrence becomes a pattern, your doctor may test household members for asymptomatic carriage or try a different antibiotic. Tonsillectomy becomes a consideration when infections hit a specific threshold: seven or more documented episodes in one year, five or more per year for two consecutive years, or three or more per year for three consecutive years. At those levels, surgery is highly effective at breaking the cycle. Below those thresholds, the risks of surgery generally outweigh the benefits, and medical management remains the better approach.
Preventing Spread at Home
Strep spreads through respiratory droplets and direct contact. While you’re in the contagious window, a few practical steps protect the people around you. Don’t share drinking glasses, utensils, or towels. Replace your toothbrush once you’ve been on antibiotics for 24 hours, since bacteria can linger on the bristles. Wash your hands frequently, especially after coughing or sneezing. If someone in your household develops a sore throat with fever after your diagnosis, they should be tested rather than assumed to have a virus.