Strep throat is treated with antibiotics, most commonly penicillin or amoxicillin, taken for 10 days. These remain the first-line treatment because group A strep bacteria have never developed resistance to them. While antibiotics clear the infection, over-the-counter pain relievers like ibuprofen can significantly reduce throat pain within hours.
Antibiotics: The Primary Treatment
Penicillin and amoxicillin are the standard antibiotics prescribed for strep throat in both children and adults. Amoxicillin is often preferred for kids because it comes in a chewable tablet and liquid form that taste better, and it can be taken just once or twice a day. Both are taken for a full 10-day course.
For people who can’t take pills reliably or are unlikely to finish a 10-day course, a single injection of penicillin is an option. One shot treats the entire infection with no follow-up doses needed.
You should start feeling noticeably better within one to three days of starting antibiotics. Once you’ve been on them for 24 hours and have no fever, you’re generally no longer contagious and can return to work, school, or daycare. Even though symptoms improve quickly, finishing the full 10 days matters. Stopping early increases the risk of the infection coming back and of complications like rheumatic fever.
If You’re Allergic to Penicillin
A penicillin allergy doesn’t mean strep throat can’t be treated effectively. Your doctor has several alternatives. Certain types of cephalosporins (a related class of antibiotic) are safe for most people with a penicillin allergy, unless the allergy involved a severe reaction like anaphylaxis. Macrolide antibiotics and clindamycin are other common substitutes. Your doctor will choose based on the type of allergic reaction you’ve had in the past.
Managing Pain While Antibiotics Work
Antibiotics kill the bacteria, but they don’t provide immediate pain relief. That’s where over-the-counter options come in. Ibuprofen is particularly effective for sore throat pain, reducing it by 32 to 80% within two to four hours in adults and by about 70% at six hours. In children, ibuprofen works more slowly, with about a 25% reduction after two hours, but by two days, 56% fewer children still have a sore throat compared to placebo.
Acetaminophen also helps with throat pain, though studies suggest it may not act quite as fast as ibuprofen. Both are effective for short-term and longer-term relief. You can alternate between the two if one alone isn’t enough.
In cases of severe throat pain, especially with visibly swollen or pus-covered tonsils, some doctors prescribe a single dose of a steroid alongside antibiotics. Research in children shows this can cut the time to first pain relief roughly in half, from about 18 hours down to 9 hours, and shorten total sore throat duration from around 44 hours to 30 hours. For children with the most severe symptoms, the effect is even more dramatic, reducing total pain duration from roughly 71 hours to 38 hours. This isn’t standard for every strep case, but it’s an option your doctor may consider if pain is particularly intense.
How Strep Throat Is Confirmed
Before prescribing antibiotics, your doctor needs to confirm that bacteria, not a virus, are causing your sore throat. Most offices use a rapid strep test, which involves swabbing the back of your throat and getting results in minutes. These tests correctly identify strep about 86% of the time when it’s present, and they’re accurate 96% of the time when they say you don’t have it.
Because the rapid test misses roughly 14% of true strep cases, some doctors send a backup throat culture when the rapid test is negative, particularly in children. A throat culture takes one to two days for results but catches cases the rapid test misses. In adults, a backup culture is less commonly needed because strep complications are rarer in that age group.
Why Treatment Matters: Complications of Untreated Strep
Most sore throats are viral and resolve on their own, but strep is different. Left untreated, group A strep can trigger rheumatic fever, a serious inflammatory condition that can damage the heart valves. Rheumatic fever typically develops one to five weeks after the initial throat infection. In about a third of cases, it follows infections that were so mild the person never sought medical attention, which is one reason testing matters even when symptoms seem manageable.
Untreated strep can also lead to a kidney condition called post-streptococcal glomerulonephritis, as well as more immediate problems like peritonsillar abscess, where a pocket of pus forms near the tonsil. Antibiotic treatment dramatically reduces these risks.
Recurrent Strep Infections
Some people, especially school-age children, seem to get strep throat repeatedly. There are a few possible explanations. The initial antibiotic course may not have fully cleared the bacteria, the person may be getting reinfected by a close contact, or they may be a strep carrier, someone who harbors the bacteria in their throat without symptoms and then tests positive whenever they catch a regular viral sore throat.
For truly recurrent infections, doctors sometimes switch to a different antibiotic class or recommend tonsillectomy if episodes are frequent enough (typically seven or more in a single year, or five per year over two years). Carriers generally don’t need treatment because they’re at very low risk for complications and rarely spread the bacteria to others.
Home Care Alongside Treatment
While antibiotics and pain relievers do the heavy lifting, a few simple measures can make the days of recovery more comfortable. Warm liquids like broth or tea with honey soothe an inflamed throat. Cold foods like popsicles or ice chips can numb pain temporarily. Gargling with warm salt water (about half a teaspoon of salt in a cup of water) reduces swelling. Staying hydrated is especially important because pain often makes people drink less, and dehydration can make you feel worse overall.
Humidifying the air in your bedroom can also help if dry air is irritating your throat, and getting extra rest supports your immune system while antibiotics do their work.