Amoxicillin: Uses, Side Effects, Warnings, Precautions, and Patient Information

What Is Amoxicillin?

Amoxicillin is a prescription antibiotic belonging to the penicillin class of antibiotics. It is widely used to treat a variety of bacterial infections affecting the ears, nose, throat, lungs, skin, urinary tract, and other parts of the body. Amoxicillin works by stopping the growth of bacteria and is effective only against bacterial infections. It does not work against viral infections such as the common cold or influenza.

Healthcare providers may prescribe amoxicillin alone or in combination with other medications to treat specific infections, including Helicobacter pylori (H. pylori) infection associated with stomach ulcers.

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Drug Information

• Generic Name: Amoxicillin
• Common Brand Names (USA): Amoxil, Moxatag (extended-release), Trimox (discontinued in many markets), Generic Amoxicillin
• Common Brand Names (India): Novamox, Mox, Amoxycillin Capsules IP, Amoxyclav (combination with clavulanic acid), Almox, Amoxil, Moxikind, Amoxicap, Amoxycillin DT
• Drug Class: Penicillin Antibiotic (Aminopenicillin)
• Prescription Required: Yes
• Controlled Substance: No
• Dosage Forms: Capsules, Tablets, Chewable Tablets, Extended-Release Tablets, Oral Suspension, Powder for Oral Suspension
• Route of Administration: Oral
• Original Manufacturer (Amoxil): Beecham (now part of GSK)

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Active Ingredient

Each dosage form contains:

• Amoxicillin (usually as amoxicillin trihydrate)

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Available Strengths

Capsules

• 250 mg
• 500 mg

Tablets

• 500 mg
• 875 mg

Chewable Tablets

• 125 mg
• 250 mg

Extended-Release Tablets (Moxatag)

• 775 mg

Oral Suspension

• 125 mg/5 mL
• 200 mg/5 mL
• 250 mg/5 mL
• 400 mg/5 mL

Availability may vary depending on the manufacturer and country.

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Brand Names

United States

• Amoxil
• Moxatag
• Generic Amoxicillin

India

• Novamox
• Mox
• Almox
• Moxikind
• Amoxil
• Amoxicap
• Amoxyclav (combination product)
• Amoxycillin DT
• Generic Amoxicillin

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Uses of Amoxicillin

Amoxicillin is prescribed to treat susceptible bacterial infections, including:

Ear, Nose, and Throat Infections

• Ear infections (otitis media)
• Sinus infections (sinusitis)
• Strep throat (streptococcal pharyngitis)
• Tonsillitis

Respiratory Tract Infections

• Bronchitis
• Pneumonia
• Other susceptible lower respiratory tract infections

Urinary Tract Infections (UTIs)

• Certain uncomplicated urinary tract infections caused by susceptible bacteria

Skin and Soft Tissue Infections

• Cellulitis
• Wound infections
• Skin abscesses (when appropriate)

Dental Infections

• Tooth abscess
• Gum infections
• Dental procedure-related infections when prescribed

Helicobacter pylori Infection

• Used in combination with other medications to help eradicate H. pylori and reduce the risk of stomach ulcers.

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How Amoxicillin Works

Amoxicillin kills susceptible bacteria by interfering with the formation of their cell walls. Without a properly formed cell wall, bacteria cannot survive and multiply, allowing the body's immune system to clear the infection.

It begins working soon after the first dose, but symptoms may take a few days to improve. It is important to complete the full course of treatment even if you start feeling better.

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General Dosage

The appropriate dose depends on:

• Age
• Body weight (especially in children)
• Type and severity of infection
• Kidney function
• Overall health

Your healthcare provider will determine the correct dose and duration of treatment. Do not take more or less than prescribed, and do not stop treatment early unless advised by your healthcare provider.

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How to Take Amoxicillin

• Take exactly as prescribed.
• May be taken with or without food.
• Swallow capsules or tablets with water.
• Shake the oral suspension well before each use.
• Measure liquid doses with a proper dosing device.
• Space doses evenly throughout the day if taking multiple daily doses.
• Complete the entire prescribed course, even if symptoms improve.

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Common Side Effects

Common side effects may include:

• Nausea
• Vomiting
• Diarrhea
• Mild stomach upset
• Rash
• Headache
• Changes in taste
• Oral or vaginal yeast infection

Most side effects are mild and temporary.

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Serious Side Effects

Seek immediate medical attention if you experience:

• Severe allergic reaction
• Difficulty breathing
• Swelling of the face, lips, tongue, or throat
• Severe or persistent diarrhea
• Bloody stools
• Severe skin rash or blistering
• Yellowing of the skin or eyes
• Unusual bruising or bleeding
• Seizures (rare)

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Warnings and Precautions

Tell your healthcare provider before taking amoxicillin if you have:

• Allergy to penicillin or cephalosporin antibiotics
• Kidney disease
• Infectious mononucleosis
• Asthma
• History of severe allergies
• Previous antibiotic-associated diarrhea

Using antibiotics when they are not needed may contribute to antibiotic resistance.

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Contraindications

Do not take amoxicillin if you:

• Are allergic to amoxicillin, penicillin, or any ingredient in the medication.
• Have had a serious allergic reaction to another penicillin antibiotic.

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Drug Interactions

Amoxicillin may interact with:

• Warfarin
• Methotrexate
• Probenecid
• Allopurinol
• Certain oral contraceptives (effect may be reduced in some situations)
• Other antibiotics

Always tell your healthcare provider about all prescription medicines, over-the-counter medicines, vitamins, and herbal supplements you are taking.

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Food and Alcohol

Amoxicillin may be taken with or without food.

There is no known direct interaction between amoxicillin and alcohol, but excessive alcohol consumption may worsen side effects or delay recovery from infection.

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Pregnancy

Amoxicillin is generally considered safe during pregnancy when prescribed by a healthcare provider. It should be used only when clearly needed.

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Breastfeeding

Small amounts of amoxicillin pass into breast milk. It is generally considered compatible with breastfeeding, but infants should be monitored for diarrhea, rash, or yeast infection.

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Missed Dose

If you miss a dose:

• Take it as soon as you remember.
• Skip the missed dose if it is almost time for your next scheduled dose.
• Do not take two doses at the same time.

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Overdose

Symptoms of overdose may include:

• Severe nausea
• Vomiting
• Persistent diarrhea
• Crystalluria (crystals in urine)
• Kidney problems
• Seizures (rare)

Seek emergency medical attention if an overdose is suspected.

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Storage

Store amoxicillin:

• Tablets and capsules at room temperature between 20°C and 25°C (68°F to 77°F).
• Keep away from heat, moisture, and direct sunlight.
• Refrigerate the oral suspension if recommended by the manufacturer and discard any unused suspension after the recommended period.
• Keep out of reach of children and pets.

Disclaimer

This information is intended for educational purposes only and should not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. Do not use antibiotics without a prescription or share them with others.