Strep throat is treated with antibiotics, and the two recommended options are penicillin and amoxicillin. These remain the go-to choices because group A strep bacteria have never developed resistance to them. Most people start feeling better within a few days of their first dose, but the full course of treatment lasts 10 days.
Penicillin and Amoxicillin: The First Choice
Both penicillin and amoxicillin work equally well against strep throat. Amoxicillin is often preferred for children simply because it tastes better in liquid form and can be taken once or twice a day, making it easier to stick with. Adults are typically prescribed penicillin taken twice daily. Either way, the standard treatment course is 10 days of oral antibiotics.
There’s also a one-shot option. A single injection of penicillin G clears the infection without requiring a 10-day pill regimen. This can be helpful if there’s concern about someone not finishing the full course of oral antibiotics, which is one of the most common reasons treatment fails.
If You’re Allergic to Penicillin
Penicillin allergies are common, and alternatives exist, but the options are narrowing. Doctors may prescribe a cephalosporin-type antibiotic (a related class that most people with penicillin allergies can still tolerate) or a macrolide antibiotic like azithromycin. However, the CDC reports that roughly 1 in 3 invasive group A strep infections now involve bacteria resistant to erythromycin and clindamycin, two antibiotics that have traditionally served as backups. If you have a penicillin allergy, it’s worth discussing with your provider whether you’ve ever been formally tested for the allergy, since many people who were labeled allergic as children actually tolerate penicillin just fine.
Why 10 Days Matters
You’ll likely feel significantly better within two to three days of starting antibiotics. That improvement tempts a lot of people to stop taking their medication early. Don’t. The 10-day course isn’t just about clearing your symptoms. It’s about fully eliminating the bacteria from your throat so the infection doesn’t come back or lead to complications.
Strep throat that isn’t properly treated can trigger rheumatic fever, which typically develops one to five weeks after the initial infection. Rheumatic fever causes inflammation that can permanently damage heart valves. In severe cases, it requires heart surgery and can be fatal. It can also cause a type of kidney inflammation. These complications are rare precisely because antibiotics are so effective when taken as prescribed.
When You Stop Being Contagious
Once you’ve taken your first dose of antibiotics, you become non-contagious surprisingly fast. Most public health guidelines consider you safe to return to work or school after just 12 hours of antibiotic treatment. Without antibiotics, you can remain contagious for two to three weeks even after symptoms start to fade. This is one of the practical reasons treatment matters beyond just feeling better.
Managing Pain While Antibiotics Work
Antibiotics kill the bacteria, but they don’t directly relieve the sore throat, fever, or headache that make strep so miserable in the first couple of days. Over-the-counter pain relievers fill that gap. Ibuprofen and acetaminophen both work well to reduce throat pain and bring down a fever. You can alternate between the two if one alone isn’t enough.
For children and teenagers, avoid aspirin entirely. Aspirin has been linked to Reye’s syndrome, a rare but serious condition that can cause liver and brain swelling, particularly in young people recovering from infections. Stick with ibuprofen or acetaminophen for anyone under 18.
Beyond medication, simple comfort measures help. Warm liquids, cold treats like popsicles, and saltwater gargles can all soothe an inflamed throat while you wait for the antibiotics to do their work. Staying hydrated is especially important when swallowing is painful, since people tend to drink less and can become mildly dehydrated without realizing it.
What Doesn’t Treat Strep Throat
Strep throat is a bacterial infection, so it will not respond to home remedies, honey, herbal teas, or “natural” antibacterials on their own. These can ease discomfort, but they won’t eliminate group A strep from your throat or prevent complications. Viral sore throats often resolve without treatment, which leads some people to assume strep will too. It sometimes does clear on its own, but the risk of rheumatic fever and prolonged contagiousness makes that a gamble not worth taking.
Antibiotics also need to be the right ones. Leftover antibiotics from a previous illness, or antibiotics prescribed for a different type of infection, may not be effective against strep and can contribute to resistance in other bacteria. A confirmed strep diagnosis through a rapid test or throat culture, followed by the correct prescription, is the straightforward path to recovery.