Principen (Oral)

Questions | Reviews **~

use of principen 500mg. cap

At present I have a wound on my foot caused by a thisle. I have been using Corisoden on it. However in the last few days my foot has become extremely swollen. I have some principen 500mg capsules. Might they be helpful for the swelling and infection? ...
by Jane S Evans in Waynesburg, Pa 15370, 07/29/2006

Principen (Oral) Drug and Prescription Information

Principen (Oral)

Principen (Oral) Medication Classification


Principen (Oral) Brandname


Principen (Oral) is used for the Treatment

Ampicillin (am-pi-SILL-in) Treats infections. Belongs to a group of drugs called penicillin antibiotics.

When To Not Use Principen (Oral)

You should not use ampicillin if you have had an allergic reaction to any type of penicillin.

How Should You Use Principen (Oral)

Capsule, Liquid, Tablet

  • Your doctor will tell you how much to take and how often.
  • It is important that you keep taking the medicine for as long as your doctor tells you, even if you feel better.
  • Shake the oral liquid before each use.
  • Take the medicine on an empty stomach, 1 hour before or 2 hours after meals with a full glass of water.
  • Measure your medicine with a marked measuring spoon or medicine cup.
  • If a dose is missed:
  • Take the missed dose as soon as possible.
  • Take the rest of the doses for that day at regularly spaced times.
  • You should not use two doses at the same time.

Proper Principen (Oral) Storage

Store Principen (Oral) at room temperature away from sunlight and moisture unless otherwise stated by manufacturer's instructions or labelling. Keep Principen (Oral) and all medications out of the reach of children.

What To Avoid While Using Principen (Oral)

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • Make sure your doctor knows if you are taking estrogen, probenecid, blood thinners (such as Coumadin®), cholestyramine (Questran®), or colestipol (Colestid®).
  • Birth control pills may not work as well while taking penicillin. Use another kind of birth control while you are taking this medicine.
  • Ampicillin may cause incorrect results with some urine sugar tests used by people with diabetes.

Principen (Oral) Warnings

  • If you have severe diarrhea, check with your doctor before taking any medicine to stop the diarrhea.
  • Make sure your doctor knows if you have ever had an allergic reaction to any cephalosporin antibiotic such as Keflex® or Ceclor® before you take ampicillin.
  • If your symptoms do not improve in a few days or become worse, call your doctor.
  • If you are pregnant or breastfeeding, talk to your doctor before taking ampicillin.
  • Make sure your doctor knows if you have mononucleosis ("mono"), stomach or intestinal disease, asthma, liver disease, hay fever, or other allergies before you take this medicine.

Principen (Oral) Side Effects

Call your doctor right away if you notice any of these side effects:

  • Rash, hives, or blistering or peeling skin
  • Swelling of the face, throat, or lips
  • Wheezing or trouble breathing
  • Severe diarrhea (watery, possibly with blood)
  • If you notice these less serious side effects, talk with your doctor:
  • Mild diarrhea
  • Nausea
  • Sore mouth or tongue
  • Vaginal itching or discharge

Principen (Oral) Ratings

Overall Rating:



(based on 2 reviews)



Ease of Use:


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