Medications and Drugs
Brand Names: Principen
Generic Name: ampicillin (Pronunciation: am pi SIL in)
What is ampicillin (Principen)?
Ampicillin is an antibiotic in the penicillin group of drugs. It fights bacteria in your body.
Ampicillin may also be used for purposes not listed in this medication guide.
Ampicillin 250 mg-STA
blue/gray, imprinted with WC 402
Ampicillin 250 mg-TEV
blue/white, imprinted with AMP, 250
Ampicillin 500 mg-STA
blue/gray, imprinted with WC 404
Ampicillin 500 mg-TEV
blue/white, imprinted with AMP, 500
Principen 250 mg
gray/red, imprinted with BRISTOL 7992
Principen 500 mg
gray/red, imprinted with BRISTOL 7993
What are the possible side effects of ampicillin (Principen)?
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:
Less serious side effects may include
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is the most important information I should know about ampicillin (Principen)?
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.
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.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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