Strep throat is treated with antibiotics, most commonly amoxicillin or penicillin, taken for 10 days. Over-the-counter pain relievers like ibuprofen and acetaminophen can manage the throat pain and fever while the antibiotics work. Most people start feeling better within two to three days of starting treatment, though finishing the full course is essential.
Antibiotics: The Primary Treatment
Strep throat is a bacterial infection, which means antibiotics are the only medicines that actually eliminate it. Penicillin and amoxicillin are the first-choice antibiotics recommended by the CDC. Group A Streptococcus bacteria have not developed resistance to these drugs, so they remain highly effective decades after they were first used for this purpose.
Amoxicillin is often preferred for children because it tastes better in liquid form and can be taken just once or twice a day. Adults are typically prescribed either amoxicillin or penicillin V, taken twice daily for 10 days. For people who have trouble completing a full course of pills, a single injection of penicillin G is an alternative that delivers the entire treatment in one visit.
The 10-day duration matters. Even though symptoms usually improve within a few days, stopping early allows surviving bacteria to rebound. This can lead to a return of symptoms and increases the risk of complications like rheumatic fever, a serious inflammatory condition that can damage the heart. Rheumatic fever typically develops one to five weeks after an untreated or incompletely treated strep infection. In roughly one-third of cases, it follows infections where no medical treatment was ever sought.
Options If You’re Allergic to Penicillin
If you have a penicillin allergy, your doctor will choose from a few alternative classes of antibiotics. First-generation cephalosporins (like cephalexin) are commonly used for people whose penicillin allergy is mild, such as a rash. These drugs are structurally related to penicillin, so they’re generally avoided in people who’ve had a severe allergic reaction like throat swelling or anaphylaxis.
For serious penicillin allergies, macrolide antibiotics (like azithromycin) or clindamycin are typical alternatives. These work through completely different mechanisms and carry no cross-reactivity risk. Your doctor will select the best option based on your allergy history, and the treatment course may vary slightly from the standard 10 days.
Over-the-Counter Pain and Fever Relief
Antibiotics kill the bacteria but don’t do much for the immediate pain. That’s where over-the-counter options come in. Ibuprofen and acetaminophen are the two main choices, and both are effective at reducing throat pain and fever. You can use them individually or, for adults and children 12 and older, in combination. A common combination tablet contains 250 mg of acetaminophen and 125 mg of ibuprofen, taken every eight hours as needed, with a maximum of six tablets per day.
If you’re using acetaminophen alone, stay under 4,000 mg in a 24-hour period to avoid liver damage. Ibuprofen also reduces inflammation, which can make swallowing more comfortable. For children under 12, dosing of either medication should be based on the child’s weight, and a pharmacist can help you calculate the right amount.
Throat lozenges containing menthol or benzocaine can provide short-term numbing relief between doses of pain medication. They won’t speed recovery, but they can make the worst days more bearable.
Corticosteroids for Severe Pain
When throat pain is especially intense, some doctors prescribe a single dose of a corticosteroid (typically dexamethasone) alongside the antibiotic. A BMJ clinical practice guideline found that a single dose of corticosteroids increases the chance of complete pain resolution at both 24 and 48 hours and may shorten the overall duration of pain by about one day. The benefit is modest but real for people in significant discomfort.
A single dose is unlikely to cause serious side effects. That said, it doesn’t reduce the number of days missed from work or school, so it’s primarily a comfort measure. Not every case warrants it, and the decision usually depends on how severe the pain is at the time of diagnosis.
Supportive Home Remedies
Several home measures can ease symptoms while you wait for antibiotics to take full effect. Salt water gargles are one of the most studied: the Mayo Clinic recommends mixing one-quarter to one-half teaspoon of table salt into eight ounces of warm water. A randomized trial of hypertonic saline gargling found it reduced the duration of upper respiratory illness by nearly two days compared to no gargling. While that study looked at viral infections broadly, the mechanism of drawing fluid out of swollen tissue applies to strep-related throat swelling as well.
Cold liquids, popsicles, and ice chips can numb the throat temporarily. Warm liquids like broth or tea with honey (for anyone over age one) soothe irritation differently but are equally popular. Staying well hydrated is genuinely important because fever and reduced eating both contribute to dehydration, which can make you feel worse overall. A cool-mist humidifier in the bedroom helps prevent the dry air that makes throat pain spike overnight.
How Quickly You’ll Feel Better
Most people notice improvement within 48 to 72 hours of starting antibiotics. Fever often breaks within the first day or two. You’re generally considered no longer contagious after 12 to 24 hours on antibiotics, which is the standard threshold for returning to school or work. Without antibiotics, strep throat can remain contagious for two to three weeks, even after symptoms fade.
If your symptoms haven’t improved after three days on antibiotics, or if they get worse at any point, that’s worth a follow-up visit. Occasionally the initial antibiotic choice doesn’t work, or the diagnosis turns out to be something else entirely, like a peritonsillar abscess that requires different treatment.