Health Guide
Drug Guide

Amoxicillin (Oral route)

Pronunciation:

a-mox-i-SIL-in

Brand Names:

Dosage Forms:

Classifications:

Therapeutic

Antibiotic

Pharmacologic

Penicillin, Aminopenicillin

Uses of This Medicine:

Amoxicillin is used to treat bacterial infections in many different parts of the body. It is also used with other medicines (e.g., clarithromycin, lansoprazole) to treat H. pylori infection and duodenal ulcers.

Amoxicillin belongs to the group of medicines known as penicillin antibiotics. It works by killing the bacteria and preventing their growth. However, this medicine will not work for colds, flu, or other virus infections.

This medicine is available only with your doctor's prescription.

Before Using This Medicine:

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Children

Appropriate studies performed to date have not demonstrated pediatric-specific problems that would limit the usefulness of amoxicillin in children. However, newborns and infants 3 months of age and younger have incompletely developed kidney functions, which may need a lower dose of this medicine.

Older adults

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of amoxicillin in the elderly. However, elderly patients are more likely to have age-related kidney problems, which may require caution and an adjustment in the dose for patients receiving amoxicillin.

Pregnancy

Pregnancy CategoryExplanation
All TrimestersBAnimal studies have revealed no evidence of harm to the fetus, however, there are no adequate studies in pregnant women OR animal studies have shown an adverse effect, but adequate studies in pregnant women have failed to demonstrate a risk to the fetus.

Breast-feeding

Studies in women suggest that this medication poses minimal risk to the infant when used during breastfeeding.

Other medicines

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

Other interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other medical problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

Proper Use of This Medicine:

Take this medicine only as directed by your doctor. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered.

You may take this medicine with or without food.

For patients using the oral liquid:

Keep using this medicine for the full treatment time, even if you feel better after the first few doses. Your infection may not clear up if you stop using the medicine too soon.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

Missed dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

You may store the oral liquid in the refrigerator. Throw away any unused medicine after 14 days. Do not freeze.

Precautions While Using This Medicine:

If your or your child's symptoms do not improve within a few days, or if they become worse, check with your doctor.

This medicine may cause a serious allergic reaction called anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Call your doctor right away if you have a skin rash; itching; shortness of breath; trouble with breathing; trouble with swallowing; or any swelling of your hands, face, mouth, or throat after you or your child receive this medicine.

Amoxicillin may cause diarrhea, and in some cases it can be severe. It may occur 2 months or more after you stop taking this medicine. Do not take any medicine or give medicine to your child to treat diarrhea without first checking with your doctor. Diarrhea medicines may make the diarrhea worse or make it last longer. If you have any questions about this or if mild diarrhea continues or gets worse, check with your doctor.

Before you have any medical tests, tell the doctor in charge that you or your child are taking this medicine. The results of some tests may be affected by this medicine.

In some young patients, tooth discoloration may occur while using this medicine. The teeth may appear to have brown, yellow, or gray stains. To help prevent this, brush and floss your teeth regularly or have a dentist clean your teeth.

Birth control pills may not work while you are using this medicine. To keep from getting pregnant, use another form of birth control along with your birth control pills. Other forms include a condom, a diaphragm, or a contraceptive foam or jelly.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Side Effects of This Medicine:

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

Incidence not known
Abdominal or stomach cramps or tenderness
back, leg, or stomach pains
black, tarry stools
bleeding gums
blistering, peeling, or loosening of the skin
bloating
blood in the urine
bloody nose
chest pain
chills
clay-colored stools
cough
dark urine
diarrhea
diarrhea, watery and severe, which may also be bloody
difficulty with breathing
difficulty with swallowing
dizziness
fast heartbeat
feeling of discomfort
fever
general body swelling
headache
heavier menstrual periods
hives or welts
increased thirst
inflammation of the joints
itching
joint or muscle pain
loss of appetite
muscle aches
nausea or vomiting
nosebleeds
pain
pain in the lower back
pain or burning while urinating
painful or difficult urination
pale skin
pinpoint red spots on the skin
puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
rash
red, irritated eyes
redness, soreness, or itching skin
shortness of breath
sore throat
sores, ulcers, or white spots in the mouth or on the lips
sores, welting, or blisters
sudden decrease in the amount of urine
swollen, lymph glands
tenderness
tightness in the chest
unpleasant breath odor
unusual bleeding or bruising
unusual tiredness or weakness
unusual weight loss
vomiting of blood
watery or bloody diarrhea
wheezing
yellow eyes or skin

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common
Bad, unusual, or unpleasant (after) taste
change in taste
Incidence not known
Agitation
black, hairy tongue
changes in behavior
confusion
convulsions
discoloration of the tooth (brown, yellow, or gray staining)
dizziness
sleeplessness
trouble with sleeping
unable to sleep
white patches in the mouth or throat or on the tongue
white patches with diaper rash

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.


Last Updated: 9/15/2016

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