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Common Brand Name(s): Ampilean
This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs.
Ampicillin is used to treat a wide variety of bacterial infections. It is a penicillin-type antibiotic. It works by stopping the growth of bacteria.
This antibiotic treats only bacterial infections. It will not work for viral infections (such as common cold, flu). Using any antibiotic when it is not needed can cause it to not work for future infections.
This medication is given by injection into a vein (intravenously-IV) or into a muscle (intramuscularly-IM) by a healthcare professional as directed by your doctor. If you are giving the injection yourself, learn all preparation and usage instructions from your healthcare professional. Follow all instructions for proper mixing and dilution with the correct IV fluids. Direct injections into the vein should be done slowly (over at least 10-15 minutes) to avoid the risk of seizures. If you have questions regarding the use of this medication, consult your pharmacist.
Before using this product, check it visually for particles or discoloration. If either is present, do not use this product.
Learn how to store and discard needles and medical supplies safely. Consult your pharmacist for more details.
The dosage is based on your medical condition, response to therapy, and weight.
For the best effect, use this antibiotic at evenly spaced times. To help you remember, use this medication at the same time(s) every day.
Continue to use this medication until the full-prescribed amount is finished even if symptoms disappear after a few days. Stopping the medication too early may allow bacteria to continue to grow, which may result in a relapse of the infection.
Inform your doctor if your condition persists or worsens.
Nausea, vomiting, or diarrhea may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.
Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including:
This medication may rarely cause a severe intestinal condition due to a bacteria called C. difficile. This condition may occur during treatment or weeks to months after treatment has stopped. Tell your doctor right away if you develop:
If you have these symptoms, do not use anti-diarrhea or opioid products because they may make symptoms worse.
Use of this medication for prolonged or repeated periods may result in oral thrush or a new vaginal yeast infection (oral or vaginal fungal infection). Contact your doctor if you notice white patches in your mouth, a change in vaginal discharge or other new symptoms.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including:
Ampicillin can commonly cause a mild rash that is usually not serious. However, you may not be able to tell it apart from a rare rash that could be a sign of a severe allergic reaction. Seek immediate medical attention if you develop any rash.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before using ampicillin, tell your doctor or pharmacist if you are allergic to it; or to penicillin or cephalosporin antibiotics; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of:
Ampicillin may cause live bacterial vaccines (such as typhoid vaccine) to not work well. Tell your health care professional that you are using ampicillin before having any immunizations/vaccinations.
Kidney function declines as you grow older. This medication is removed by the kidneys. Elderly people may be more sensitive to this drug.
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
Ampicillin passes into breast milk. Consult your doctor before breast-feeding.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with this drug include:
Ampicillin may cause false positive results with certain diabetic urine testing products (cupric sulfate-type). This drug may also affect the results of certain lab tests. Make sure laboratory personnel and your doctors know you use this drug.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Alberta residents can call PADIS (Poison and Drug Information Service) 24 hours a day at 1-800-332-1414. Canada residents can call a provincial poison control center. Symptoms of overdose may include: severe vomiting, persistent diarrhea, unusual change in the amount of urine, or seizures.
Do not share this medication with others.
This medication has been prescribed for your current condition only. Do not use it later for another infection unless your doctor tells you to.
With prolonged treatment, laboratory and/or medical tests (such as kidney and liver function, complete blood counts) should be performed periodically to monitor your progress or check for side effects. Consult the doctor for more details.
If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Use your next dose at the regular time. Do not double the dose to catch up.
If you have questions about missing a dose or you don't have more medication, contact your healthcare provider or pharmacist.
This medication must be stored properly. Review storage instructions with your pharmacist. Store mixed intravenous ampicillin bags in the refrigerator. Let a refrigerated bag sit at room temperature at least one hour before using. Check the expiration date before using. Store vials at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised December 2021.
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