Amoxicillin is the first-line antibiotic for middle ear infections in children, while amoxicillin-clavulanate is preferred for adults. The “best” antibiotic depends on which type of ear infection you’re dealing with, your age, allergy history, and how severe the symptoms are. Not every ear infection even needs antibiotics.
Middle Ear Infections in Children
Most ear infections in kids are acute otitis media, an infection behind the eardrum. High-dose amoxicillin (80 to 90 mg per kilogram of body weight per day) is the standard first choice. It works well against the most common bacteria involved, it’s inexpensive, and kids generally tolerate it. The liquid form makes dosing easy for young children.
If a child has taken antibiotics in the past 30 days, has recurring ear infections, or also has pink eye (which often signals a different bacterial strain), amoxicillin-clavulanate is typically used instead. The clavulanate component helps overcome bacteria that have developed resistance to plain amoxicillin by producing enzymes that break it down.
How long the course lasts depends on age. Children under 2 usually take antibiotics for 10 days. Kids aged 2 to 5 take a 7-day course. Children 6 and older often need only 5 days.
When Antibiotics Can Wait
Not every ear infection in a child requires immediate antibiotics. For mild, one-sided infections in children 6 months and older, a “watch and wait” approach is reasonable. This means managing pain for 48 to 72 hours and starting antibiotics only if symptoms worsen or don’t improve. Severe symptoms change the picture: a fever of 102.2°F or higher in the past 48 hours, moderate to severe ear pain, pain lasting more than 48 hours, or drainage from a ruptured eardrum all call for antibiotics right away.
In nonverbal children who can’t describe their pain, holding, tugging, or rubbing the ear are common signs. A diagnosis requires visible fluid behind the eardrum, not just redness or fussiness.
Middle Ear Infections in Adults
Adults get middle ear infections less often, but they happen. The preferred first-line treatment for adults is amoxicillin-clavulanate rather than plain amoxicillin. The standard adult dose is 875 mg of amoxicillin with 125 mg of clavulanate, taken twice daily.
Adults at higher risk for resistant bacteria may need a stronger dose. This includes people over 65, those with weakened immune systems, anyone who used antibiotics in the past month, or people living in areas where antibiotic-resistant bacteria are more common. In those cases, an extended-release formulation with a higher amoxicillin component is used.
Swimmer’s Ear Needs a Different Approach
Outer ear infections (swimmer’s ear) are treated with antibiotic ear drops, not oral antibiotics. The infection sits in the ear canal rather than behind the eardrum, so drops deliver medication directly where it’s needed.
Ciprofloxacin or ofloxacin drops are the standard choices. Older combination drops containing neomycin are no longer recommended because the neomycin component frequently causes allergic skin reactions. For more severe outer ear infections where the canal is very swollen, a small sponge wick may be placed in the ear to help deliver the drops deeper into the canal.
The most common side effects from antibiotic ear drops are mild: itching, redness, or swelling around the ear that wasn’t there before treatment. Stinging or burning in the ear canal can happen but is uncommon.
Options if You’re Allergic to Penicillin
Since amoxicillin belongs to the penicillin family, allergies are a real consideration. For mild penicillin allergies (a rash but no breathing problems or swelling), several alternatives work well. Cefdinir, cefuroxime, and cefpodoxime are all oral options from a related antibiotic class that most people with mild penicillin allergies can still take safely.
For severe penicillin allergies involving anaphylaxis or significant swelling, those related antibiotics aren’t safe either. In children with severe allergies, levofloxacin may be considered. Your prescriber will weigh the risks carefully since this class of antibiotic is generally reserved for situations where safer options aren’t available.
Why the “Best” Antibiotic Varies
There’s no single best antibiotic for every ear infection. The choice depends on several overlapping factors: the type of infection (middle ear vs. outer ear), whether the patient is a child or adult, severity of symptoms, recent antibiotic use, allergy history, and local patterns of bacterial resistance. An antibiotic that works perfectly for one person may be the wrong choice for another.
What stays consistent is the principle of using the narrowest effective antibiotic first. Plain amoxicillin covers most childhood ear infections. Jumping to broader antibiotics unnecessarily contributes to resistance, making those drugs less effective when they’re truly needed. If a first-line antibiotic doesn’t improve symptoms within 48 to 72 hours, that’s typically when a prescriber will switch to a broader option like amoxicillin-clavulanate or a cephalosporin alternative.