Strep throat is treated with antibiotics, most commonly penicillin or amoxicillin, taken for 10 days. These remain the go-to options because the bacteria that cause strep throat have never developed resistance to them. While you wait for the antibiotics to kick in, over-the-counter pain relievers and simple home remedies can make the sore throat much more bearable.
First-Line Antibiotics
Penicillin and amoxicillin are the standard treatment for strep throat. The bacteria responsible (group A Streptococcus) are universally susceptible to these drugs, meaning they work virtually every time. Most courses last 10 days. Amoxicillin is often preferred for children because it comes in a flavored liquid and tastes better than penicillin suspension.
It’s important to finish the entire course even though you’ll feel significantly better within a day or two. Stopping early doesn’t just risk a relapse. It also leaves the door open to more serious complications.
Options if You’re Allergic to Penicillin
If you have a penicillin allergy, your provider has several alternatives. Cephalosporin-class antibiotics (like cephalexin) are a common substitute and also work for 10 days. However, if your allergy is severe, specifically the type that causes hives, swelling, or breathing difficulty, cephalosporins aren’t safe either.
In those cases, the usual alternatives are azithromycin (a 5-day course) or clindamycin (10 days). One thing worth knowing: about 27% of strep isolates now show resistance to azithromycin, and 26% resist clindamycin, based on 2023 data from the CDC. That doesn’t mean these drugs won’t work for you, but it does explain why penicillin and amoxicillin remain the first choice whenever possible.
How Quickly Antibiotics Work
Most people notice improvement within one to two days of starting antibiotics. The timeline that matters most for others around you: you’re generally no longer contagious within 12 hours of your first dose. Schools and daycares typically follow this same rule, allowing children to return after 12 hours on antibiotics as long as they feel well enough.
Even though symptoms fade fast, the full 10-day course (or 5 days for azithromycin) is necessary to fully clear the infection and prevent complications.
Managing Pain and Fever While You Recover
Antibiotics kill the bacteria, but they don’t do much for the sore throat pain itself in the first day or so. Over-the-counter pain relievers fill that gap well. Ibuprofen (Advil, Motrin) both reduces inflammation and eases pain, making it particularly helpful for the swollen, raw feeling in your throat. Acetaminophen (Tylenol) is another solid option for pain and fever.
One caution for parents: never give aspirin to children or teenagers. It has been linked to Reye’s syndrome, a rare but potentially life-threatening condition, especially in kids recovering from infections.
Home Remedies That Help
Several simple strategies can ease throat pain alongside your antibiotics:
- Salt water gargle. Dissolve half a teaspoon of salt in a glass of warm water and gargle every three hours. This reduces swelling and loosens mucus.
- Warm or cold liquids. Warm tea, broth, or cold ice water all soothe the throat. There’s no wrong temperature; go with whatever feels better.
- Honey. It coats and calms irritated throat tissue, and it has mild antibacterial properties. Stir it into tea, take a spoonful on its own, or use honey-based lozenges. Do not give honey to children under 1 year old.
- Frozen treats. Popsicles, ice chips, and sorbet numb the throat and keep you hydrated at the same time.
- Steam and humidity. A hot shower or a humidifier prevents your throat from drying out, which can make the pain worse, especially if you’re breathing through your mouth.
- Medicated lozenges and throat sprays. These keep the throat moist and provide a mild numbing effect. Products containing benzocaine shouldn’t be used more than four times a day.
Rest matters more than people expect. Talking and even whispering strain an already inflamed throat. Propping yourself up with extra pillows at night can also help, since lying flat increases pressure on the back of the throat and may worsen swelling.
What Happens if Strep Goes Untreated
Strep throat does sometimes improve on its own, but leaving it untreated carries real risks. The most concerning is rheumatic fever, which can develop one to five weeks after an untreated strep infection. Rheumatic fever causes inflammation throughout the body, and if it isn’t caught quickly, it can permanently damage the heart valves. Severe rheumatic heart disease may require surgery and can be fatal.
Other possible complications of untreated strep include kidney inflammation and abscesses around the tonsils. These are uncommon with proper antibiotic treatment, which is the main reason a confirmed strep diagnosis always calls for a prescription rather than a wait-and-see approach.
Getting the Right Diagnosis
Not every sore throat is strep. In fact, most sore throats are caused by viruses, which antibiotics can’t help. Strep throat is confirmed with a rapid strep test or a throat culture, both done with a quick swab at a clinic. Antibiotics should only be started after a positive test. Taking antibiotics for a viral sore throat won’t speed recovery and contributes to antibiotic resistance over time.