Ampicillin is an antibiotic in the penicillin group of drugs. It fights bacteria in your body. Ampicillin is used to treat many different types of infections caused by bacteria, such as ear infections, bladder infections, pneumonia, gonorrhea, and E. coli or salmonella infection. Ampicillin may also be used for purposes not listed in this medication guide.
The health and medical information provided here is for general purposes only and is not a substitute for the expertise and judgment of your physician, or other health care professional. It should not be understood to indicate that the use of this medicine is safe, appropriate or effective for you. Always consult your health care professional before using this, or any other, drug.
Do not use this medication if you are allergic to ampicillin or to any other penicillin antibiotic, such as amoxicillin (Amoxil), carbenicillin (Geocillin), dicloxacillin (Dycill, Dynapen), oxacillin (Bactocill), penicillin (Beepen-VK, Ledercillin VK, Pen-V, Pen-Vee K, Pfizerpen, V-Cillin K, Veetids), and others.
Before using ampicillin, tell your doctor if you are allergic to cephalosporins such as Ceclor, Ceftin, Duricef, Keflex, and others, or if you have asthma, kidney disease, a bleeding or blood clotting disorder, mononucleosis (also called "mono"), or a history of any type of allergy.
Ampicillin can make birth control pills less effective, which may result in pregnancy. Before taking ampicillin, tell your doctor if you use birth control pills. Take this medication for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Ampicillin will not treat a viral infection such as the common cold or flu. Do not share this medication with another person, even if they have the same symptoms you have.
Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you have diarrhea that is watery or bloody, stop taking ampicillin and call your doctor. Do not use anti-diarrhea medicine unless your doctor tells you to.
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have a serious side effect such as:
fever, sore throat, and headache with a severe blistering, peeling, and red skin rash;
diarrhea that is watery or bloody;
fever, chills, body aches, flu symptoms;
easy bruising or bleeding, unusual weakness;
urinating less than usual or not at all;
agitation, confusion, unusual thoughts or behavior; or
seizure (black-out or convulsions).
Less serious side effects may include
nausea, vomiting, stomach pain;
vaginal itching or discharge;
swollen, black, or "hairy" tongue; or
thrush (white patches or inside your mouth or throat).
Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label.
Take the medicine with a full glass of water. Ampicillin should be taken on an empty stomach, at least 1 hour before or 2 hours after eating a meal.
To be sure this medicine is helping your condition, your blood will need to be tested often. Your liver and kidney function may also need to be tested. Visit your doctor regularly.
If you are being treated for gonorrhea, your doctor may also have you tested for syphilis, another sexually transmitted disease.
Take this medication for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Ampicillin will not treat a viral infection such as the common cold or flu. Do not share this medication with another person, even if they have the same symptoms you have.
This medication can cause unusual results with certain medical tests. Tell any doctor who treats you that you are using ampicillin.
Store at room temperature away from moisture, heat, and light.