Drug and Supplements

Amoxicillin

Written by
Dr. Sneha Kannan
and medically reviewed by Dr. C Elanchezhian

Published on May 17, 2019 and last reviewed on Jun 08, 2019   -  4 min read

Abstract

Abstract

Amoxicillin is a penicillin-type antibiotic used to treat a wide range of bacterial infections. It is a broad-spectrum semisynthetic antibiotic similar to Ampicillin, except the resistance to gastric acids.

Amoxicillin

Amoxicillin is a penicillin-type antibiotic used to treat a wide range of bacterial infections. It is a broad-spectrum semisynthetic antibiotic similar to Ampicillin, except the resistance to gastric acids. This medicine works by killing and preventing the growth of bacteria. It only works on infections caused by bacteria and not viral infections like cold and flu. It is also used with other medications like Clarithromycin and Lansoprazole to treat H.pylori infection. Amoxicillin is commonly prescribed with Clavulanic acid (a beta-lactamase inhibitor), as it is susceptible to beta-lactamase degradation.

Always use Amoxicillin or any other antibiotic only when your doctor prescribes it. Indiscriminate use and using it when you do not have a bacterial infection decreases the effectiveness of the medicine when you actually need it.

What Is Amoxicillin Used For?

This medicine is used to treat the following bacterial infections:

How to Use Amoxicillin?

Take antibiotics or any other medicine only if your healthcare provider prescribes them. Avoid buying over-the-counter medicines and self-medication. Take the tablet for as many days prescribed by your doctor, even if your symptoms have reduced. Stopping the antibiotic without finishing the course might increase the risk of the bacteria developing a resistance to the antibiotic, and the infection could recur.

Amoxicillin is available as:

  • A dry tablet or capsule - Tablets and capsules should be taken with water.

  • A chewable tablet - Chewable tablets should be properly and completely chewed before swallowing.

  • A suspension - Oral suspensions have to be mixed with water before consuming them.

  • Syrup - The syrup bottle should be shaken properly before taking. Shaking distributes the medicine evenly throughout the liquid.

What Is the Dosage of Amoxicillin?

The strength and duration of this medicine will be different for different patients, as it depends on the severity of the infection. The average doses used for a bacterial infection are:

  • Adult - 250 to 500 mg every 8 hours or 500 to 875 mg every 12 hours.

  • Children - 20 to 40 mg/kg per day.

  • Infants 3 months or younger - 30 mg/kg per day.

What to Do If You Miss a Dose of Amoxicillin?

Depending on the severity of infection, Amoxicillin is generally taken twice or thrice a day, that is every 12 or 8 hours. If you somehow miss a tablet, then take it as soon as you remember. But if it is almost time for the next dose, then skip the missed tablet, and never take a double dose.

What Are the Common Side Effects of Amoxicillin?

Some of the common side effects of Amoxicillin are:

  • Severe allergic reaction to penicillin (Anaphylactic shock).

  • Skin rashes or hives.

  • Seizures.

  • Dark-colored or bloody urine.

  • Yellowish discoloration of eyes and skin.

  • Easy bruising.

  • Unusual bleeding.

  • Tiredness.

  • Diarrhea.

  • Swelling around the eyes.

  • Clay-colored stools.

  • Stomach cramps.

  • Fungal infections like candidiasis.

What Are the Signs and Symptoms of an Allergic Reaction?

The signs and symptoms of an allergic reaction to Amoxicillin are:

And the signs of anaphylaxis are:

  • Difficulty breathing.

  • Nausea or abdominal cramps.

  • Dizziness.

  • Weak and rapid pulse.

  • Seizures.

  • Loss of consciousness.

  • Low blood pressure.

As soon as you notice signs of an allergic reaction, do not take more Amoxicillin and consult your physician immediately. A severe allergic reaction can also be fatal.

What Are the Drugs That Amoxicillin Can Interact With?

When a doctor prescribes Amoxicillin, always inform him or her about all the medicines that you are currently taking for any other illness. This will help the doctor analyze if it is safe to prescribe this antibiotic, and will prevent unwanted drug interactions.

Amoxicillin might increase or reduce the effectiveness of other drugs that you might be taking or increase the risk of side effects by reducing the excretion of the drug. Some of the drug interactions to look out for are:

  • Anticoagulant drugs (Warfarin, Heparin).

  • Antibiotics (Tetracycline, Sulfonamides, Chloramphenicol).

  • Chemotherapy (Methotrexate).

  • Muscle relaxants (Carisoprodol, Cyclobenzaprine).

  • Cholera vaccine.

  • Birth control pills.

  • Gout treatment (Allopurinol).

Amoxicillin use could lead to false positive results in urine glucose tests.

Does Amoxicillin Reduce the Effectiveness of Birth Control Measures?

Yes, Amoxicillin reduces the effectiveness of all birth control methods like birth control pills, vaginal rings, patches, etc. So, during the course of the antibiotic treatment, use barrier birth control methods like condoms.

For more information on the uses and side effects of Amoxicillin, consult a doctor online through phone or real-time video consultation.

Frequently Asked Questions


1.

What does Amoxicillin treat?

Amoxicillin is an antibiotic that is used to treat bacterial infections of the ear, nose, throat, skin, genitourinary tract, respiratory tract, and gastrointestinal tract. Some of the common infections that can be treated are ear infectiosn, bronchitis, gonorrhea, Lyme disease, tonsillitis, and pneumonia

2.

How long does Amoxicillin stay in your system?

The half-life, that is the duration of action of a drug, of Amoxicillin is 61.3 minutes. Around 60 % of medicine taken orally is excreted in the urine within 6 to 8 hours. It can be detected in the blood for up to 8 hours

3.

What do Amoxicillin and Clavulanate treat?

The combination of Amoxicillin and Clavulanate is used to treat various bacterial infections. Clavulanate is a beta-lactamase inhibitor, which works by preventing bacteria from destroying Amoxicillin. And Amoxicillin stops the growth of bacteria

4.

How long does it take for Amoxicillin to work?

You might feel better in a couple of days after starting Amoxicillin. Do not stop taking the medicine before the prescribed number of days. It is usually prescribed for 7 to 14 days

5.

How long can Amoxicillin be taken?

Always take any medicine only if prescribed by a healthcare professional. Depending on the severity of the infection, Amoxicillin is prescribed for 7 to 14 days. If your doctor feels that you need to take it longer, he or she will prescribe it. Never self-medicate

6.

How fast does Amoxicillin work for tooth infection?

For tooth infection, Amoxicillin is usually given thrice or twice daily for 5 to 7 days. Your dentist will know if you need antibiotics for your tooth infection

7.

What are the allergic reactions to Amoxicillin?

Generally, Amoxicillin causes a mild skin rash, which is not serious. But if you experience other allergic reactions like itching, swelling of face or tongue, difficulty breathing or swallowing, and dizziness, get immediate medical help

8.

Can you take Amoxicillin with other medicines?

Amoxicillin is usually prescribed with other antibiotics, painkillers, clavulanic acid, etc. But some of the medicines that should not be taken with Amoxicillin are Methotrexate, Warfarin, Heparin, Tetracycline, Sulfonamides, birth control pills, Allopurinol, Chloramphenicol, and Azithromycin

9.

How fast does Amoxicillin work for UTI?

For UTI (urinary tract infection), Amoxicillin is generally prescribed for 1 to 3 days. Depending on the severity of your symptoms and medical history, a longer course might be needed

10.

Is Amoxicillin a strong antibiotic?

Yes, Amoxicillin is a strong antibiotic as it treats a wide range of bacterial infection.

11.

Can Amoxicillin be used for bronchitis?

Amoxicillin is primarily used to treat respiratory tract infection like pneumonia. For bronchitis, it is used only for allergic patients or patients who are intolerant to macrolides

Last reviewed at:
08 Jun 2019  -  4 min read

RATING

15

Tags:

Related Questions & Answers


After tooth removal, is it safe to take extra dose of Panadeine?

Query: Hi doctor, Before 25 years, I had root canal treatment on my lower second molar. As I had a broken canal on the same tooth, it was surgically removed a few days ago. The stitches have healed, but still I have pain. The medication reduces pain, but I am worried as if I am taking an extra dose of Pa...  Read Full >>


Answer: Hi, Welcome to icliniq.com. I suggest you to take only prescribed dosage not beyond it. If still pain occurs, then I suggest Augmentin Duo 625 mg (Amoxicillin and Clavulanic acid) and Acuvin (Paracetamol) twice in a day at the interval of 12 hours for five days. Consult your doctor, discuss with h...  Read Full

Can you take Tylenol with Amoxicillin?

Query: Hi doctor, Yesterday, I had my wisdom tooth extracted. I received a prescription for Tylenol 3 (equivalent to Acetaminophen 300 mg and Codeine 30 mg) for pain and Amoxicillin (500 mg) to prevent infection. I immediately took one Amoxicillin as I walked out of the dental office and for the rest of th...  Read Full >>


Dr. Pooja Pardhi
Internal Medicine Physician

Answer: Hi. Welcome to icliniq.com. I have gone through your query and can understand your health concern. The allergic reaction can be due to Amoxicillin only, because Acetaminophen and Codeine will not cause any allergic reaction. I suggest you to stop Amoxicillin. You can use any of the Cephalosporin ins...  Read Full

Popular Articles Most Popular Articles

Do you have a question on Amoxicillin or Dosage Of Amoxicillin?

Ask a Doctor Online

* guaranteed answer within 4 hours.
Enter Your Health Query
You can upload files and images in the next step.

Fee:  

 


Disclaimer: All health articles published on this website is not intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek the advice from your physician or other qualified health-care providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website.