Rx required in the US, UK, and Canada

Amoxicillin

Also called Amoxil, Moxatag. Penicillin-class antibiotic (aminopenicillin).

Susceptible bacterial infections, including confirmed strep throat and some ear, sinus, skin, and dental infections.

Last reviewed 2 November 2026. RxNorm 723. SNOMED CT substance 372687004.

What amoxicillin treats

Primary uses clinicians actually reach for this drug for. Local resistance and your own history can take a use off the list.

Confirmed strep throat, usually for about 10 days when a penicillin-class drug is chosen.
Some ear, sinus, and lower-respiratory infections caused by susceptible bacteria. Many short sinus illnesses are still viral.
Some skin infections, and combination therapy for H. pylori when other drugs are included.
Dental infections only as an adjunct to dental treatment. Amoxicillin does not drain an abscess.

Clinicians sometimes use it for infections that are not the headline use on the carton, when cultures or local patterns support it. Off-label does not mean optional, and it does not mean you may start it yourself.

What it does not treat

Colds and runny noses, including green mucus
Flu and COVID-19
Most bronchitis and most sore throats
A tooth abscess left untreated by a dentist
A kidney infection that has not been examined

Forms, dosing examples, and how to take it

Forms

Immediate-release capsules
Tablets and chewable tablets
Oral suspension, which must be measured with the pharmacy device
Moxatag was an extended-release brand. It is not the same schedule as immediate-release amoxicillin, and you cannot swap them.

Adult examples

Adult product labeling lists more than one schedule. Kidney function, the infection site, and the exact product decide which one is written. Do not pick a row and start.

Educational examples only. Not a dosing instruction for a named patient.
Situation	Example adults may see on a label or guideline	Limit
Many mild to moderate ear, nose, throat, skin, and urinary infections on adult labeling	500 mg every 12 hours, or 250 mg every 8 hours	Duration is part of the prescription, not a number you extend.
More severe infections of those sites, and many lower-respiratory infections on adult labeling	875 mg every 12 hours, or 500 mg every 8 hours	A worse-feeling illness is a reason to be seen, not a reason to jump to the higher row.
Confirmed strep throat in adults	Often 500 mg two or three times daily for about 10 days, depending on the product chosen	Shorter courses are sometimes studied. Only the prescriber shortens the plan.

Food, minerals, and administration

Immediate-release amoxicillin can usually be taken with or without food. If it upsets your stomach, take it with food.
Shake suspension and use the measuring device from the pharmacy. Kitchen spoons are the wrong volume.
Tell the clinician if you take methotrexate. Penicillins can raise methotrexate levels.
Most antibiotics, including amoxicillin, do not meaningfully reduce the effect of combined birth-control pills. Severe vomiting or diarrhea can. Rifampin-type antibiotics are the ones that reliably interact.

Augmentin is not the same prescription

Augmentin is amoxicillin plus clavulanate. The second ingredient blocks some bacterial enzymes. It is still a penicillin, it causes more diarrhea, and it carries a liver-injury warning, especially with longer use and in older adults.

Adult labeling commonly uses 875 mg/125 mg every 12 hours or 500 mg/125 mg every 8 hours. You cannot build that combination by taking extra amoxicillin. Take it at the start of a meal if the label says so.

Clinicians reach for it when beta-lactamase is likely: some bite wounds, some sinus and ear infections that actually need an antibiotic, and some skin infections. It is a poor choice for a chest cold.

Can an online doctor prescribe amoxicillin?

Yes only inside the narrow band below. The same visit is supposed to refuse the drug outside that band.

When a prescription is plausible

A licensed clinician can prescribe amoxicillin when the illness fits a susceptible bacterial infection they can assess, and when you have not had a serious penicillin reaction.
Same-day video visits sometimes cover confirmed or strongly suspected strep, sinus symptoms that meet bacterial criteria, and some skin infections that are not spreading fast.

What the visit should cover

Where you are located, because the clinician must be allowed to practice there.
The exact allergy history: hives, wheezing, swelling, and fainting are different from a childhood rash.
Pregnancy, kidney disease, methotrexate, and recent antibiotics.
Whether the story is viral, needs a test, or needs a dentist or an emergency department.

When the clinician should refuse

A cold, flu, COVID-19, or uncomplicated bronchitis.
A serious penicillin or amoxicillin reaction. The visit may still offer a different drug. It should not offer Augmentin.
Fever with back pain, vomiting, facial swelling, trouble breathing, or a rapidly spreading skin infection.
Any request to name the drug before the history is taken, or to skip the pharmacy.

How same-day e-prescriptions and local pickup work. If the drug is prescribed, use a pharmacy you can reach today. Mail order is the wrong speed for an acute infection.

Side effects, allergies, pregnancy, and alcohol

Often mild

Nausea
Loose stools
Yeast infection
Mild rash that still needs a call before the next dose

Get care

Hives, wheezing, swelling of the mouth, fainting
Severe watery diarrhea during treatment or in the following weeks
A widespread painful rash or mouth sores
Yellow skin, especially if Augmentin was the drug

Allergies and cross-reaction

Amoxicillin and Augmentin are both penicillins. A serious reaction to either rules out both. A rash during mononucleosis is common and is not always a lifelong allergy, but you do not retest that at home. After anaphylaxis, a cephalosporin such as cephalexin is not automatically safe. Cephalexin shares a side chain with amoxicillin, so the cross-reaction question is real and belongs to a clinician.

Pregnancy

Amoxicillin is often used in pregnancy when a bacterial infection needs treatment. The obstetric clinician still chooses the drug and the dose. Do not start a leftover bottle because a previous pregnancy used it.

Alcohol

Amoxicillin has no disulfiram-style reaction with alcohol. Alcohol can worsen dizziness, stomach upset, and dehydration while you are ill. It does not make a viral infection into a reason to take the drug.

Severe watery diarrhea during or after any antibiotic can be C. difficile. Mouth or throat swelling is an emergency: call 911 or 999.

Generic, coupon, and telehealth pickup

These are budgeting bands for a common U.S. generic fill, not a national average and not a GoodRx quote. Discount-card prices change by pharmacy and ZIP code, and a card usually cannot be combined with insurance on the same fill. A telehealth visit is a separate bill, often advertised around $29 to $129 in late October 2026. The medicine is extra. Ask the pharmacy for today’s cash price and today’s coupon price before you travel.

Average-style planning bands for budgeting. Confirm the live cash price and the live coupon.
Product	U.S. cash planning band	Discount-card band, GoodRx-type	Telehealth plus local pickup
Generic amoxicillin 500 mg, about 21 to 30 capsules	Often about $10–$30	Often about $4–$15	Visit fee plus this pharmacy price, picked up locally
Generic amoxicillin-clavulanate (Augmentin), a usual adult course	Often about $20–$60	Often about $15–$40	Same visit-plus-pharmacy math. It is a different prescription.
Brand Amoxil or Moxatag, if a pharmacy still stocks it	Usually much higher than generic	Coupons rarely make the brand the rational buy	Ask for the generic unless the prescriber required a specific release type.

Questions about amoxicillin

How fast does amoxicillin work?

When the bacteria are susceptible, many people feel better within one to three days. Fever from confirmed strep often starts to ease within about 48 hours. That is an expectation, not a promise. No improvement by about 48 to 72 hours, or any worsening, is a call to the prescriber. Feeling better is not a reason to save the rest.

Can I get amoxicillin online the same day?

Sometimes. A clinician licensed where you are can send an e-prescription the same day if amoxicillin fits and a local pharmacy has it. The visit can also end with no antibiotic. A website that sells capsules with no clinician is not a telehealth partner.

Is Augmentin just a stronger amoxicillin?

No. Augmentin adds clavulanate. The dose, the diarrhea risk, and the liver warning are different. A penicillin allergy applies to both.

What should I do if I miss a dose?

Take a missed dose when you remember unless it is close to the next dose. Skip it then. Do not take two doses at once. If you vomit soon after a dose, ask the pharmacist before you repeat it. The label and the pharmacist outrank this sentence.

Can I drink alcohol while taking amoxicillin?

There is no Flagyl-type reaction. Alcohol still makes side effects and dehydration more likely. It does not treat the infection and it does not justify starting the drug for a virus.

Labels: DailyMed. Stewardship: CDC. Pharmacy checks: FDA BeSafeRx. Codes were read from RxNav on 2 November 2026 for ingredient RxCUI 723.