Strep throat is treated with antibiotics, most commonly penicillin or amoxicillin, taken for 10 days. Antibiotics kill the bacteria, shorten the illness, reduce your contagiousness, and prevent serious complications. While you wait for the medication to work, over-the-counter pain relievers and simple home remedies can make the sore throat much more bearable.
Getting a Diagnosis First
Strep throat can look and feel a lot like a viral sore throat, so a test is needed before starting antibiotics. Your doctor will typically start with a rapid antigen detection test, a quick throat swab that returns results in minutes. This test is quite reliable when it comes back positive (about 90% specificity), but it misses roughly 1 in 5 true strep cases (around 79% sensitivity). If the rapid test is negative but your symptoms strongly suggest strep, your doctor may send a throat culture, which takes one to two days but catches infections the rapid test misses.
Classic strep symptoms include sudden, severe throat pain, painful swallowing, fever, swollen tonsils (sometimes with white patches), and tender lymph nodes in the front of the neck. Notably, cough, runny nose, and hoarseness usually point toward a virus rather than strep.
Antibiotic Treatment
Penicillin and amoxicillin are the preferred antibiotics for strep throat. They’re effective, inexpensive, and narrow-spectrum, meaning they target the bacteria without unnecessarily wiping out other helpful microbes. Amoxicillin is often chosen for children because it tastes better in liquid form. The standard course is 10 days of oral medication. For adults, a typical regimen is penicillin V 500 mg twice daily or amoxicillin 1,000 mg once daily. Children receive weight-based doses.
If swallowing pills for 10 days sounds difficult, or if completing the full course is a concern, there’s also a one-time injection option. A single shot of benzathine penicillin G eliminates the need for daily pills entirely.
Finishing the full course matters even after you feel better. Stopping early can leave bacteria alive, increasing the chance of relapse and the risk of complications.
If You’re Allergic to Penicillin
For a mild penicillin allergy (rash but no breathing problems or swelling), a first-generation cephalosporin is the usual alternative. If your allergy is severe, options include macrolide antibiotics like azithromycin or clarithromycin, or clindamycin. Azithromycin has the advantage of a shorter course, typically three to five days, because it stays active in the body longer than other antibiotics. All other alternatives follow the same 10-day schedule.
How Quickly Antibiotics Work
Most people start feeling noticeably better within one to two days of starting antibiotics. Fever often breaks within 24 hours. The more important milestone: you’re no longer contagious after just 12 hours on antibiotics. That’s the threshold schools and workplaces use for return. Before that 12-hour mark, strep spreads easily through respiratory droplets from coughing, sneezing, or sharing food and drinks.
Without antibiotics, strep throat will eventually resolve on its own in most cases, but you remain contagious for weeks, feel worse for longer, and face a real risk of complications.
Managing Pain and Fever at Home
Antibiotics treat the infection, but they don’t do much for pain in the first day or two. Over-the-counter pain relievers are the most effective option for throat pain and fever. Ibuprofen (Advil, Motrin) and acetaminophen (Tylenol) both work well. You can alternate them for more consistent relief. Avoid giving aspirin to children or teenagers, as it has been linked to Reye’s syndrome, a rare but dangerous condition, when used during certain infections.
Beyond medication, a few simple measures help:
- Warm saltwater gargle. About half a teaspoon of salt dissolved in a full glass of warm water, gargled and spit out, can temporarily soothe throat pain.
- Cold or soft foods. Ice pops, smoothies, broth, and warm (not hot) tea with honey are easier to swallow and feel good on inflamed tissue. Honey should not be given to children under one year old.
- Hydration. A sore throat discourages swallowing, but staying hydrated helps your body fight the infection and keeps throat tissue from drying out.
- Rest. Your body recovers faster when you’re not pushing through a normal schedule, especially in the first 48 hours.
Why Treatment Matters: Complications
The main reason doctors insist on antibiotic treatment for strep, unlike most sore throats, is the risk of rheumatic fever. This inflammatory condition can develop one to five weeks after an untreated or improperly treated strep infection and can cause permanent damage to the heart valves. Rheumatic fever is uncommon in developed countries today largely because strep is routinely treated with antibiotics.
Other potential complications of untreated strep include peritonsillar abscess (a painful pocket of pus behind the tonsil), kidney inflammation, and the spread of infection to the sinuses or ears. Proper antibiotic treatment dramatically reduces all of these risks.
Dealing With Recurring Strep Infections
Some people, especially children, seem to catch strep throat repeatedly. A single recurrence isn’t unusual, but a pattern of frequent infections may eventually warrant a conversation about tonsillectomy. The widely used clinical threshold, known as the Paradise criteria, suggests considering tonsil removal when a child has seven or more documented throat infections in a single year, five or more per year for two consecutive years, or three or more per year for three consecutive years.
For occasional recurrences, your doctor may try a different antibiotic or check whether someone in the household is an asymptomatic carrier, unknowingly harboring the bacteria and reinfecting family members. Replacing your toothbrush after starting antibiotics is a small but sensible step to avoid reintroducing bacteria to your own throat.