Ampen capsules


  • Active Ingredient: Ampicillin
  • 500 mg, 250 mg
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What is Ampen?

The active ingredient of Ampen brand is ampicillin. Ampicillin is a penicillin antibiotic that fights bacteria. The molecular formula is C16H18N3NaO4S, and the molecular weight is 371.39. The pH range of the reconstituted solution is 8 to 10.

Used for

Ampen is used to treat diseases such as: Bacteremia, Bacterial Endocarditis Prevention, Bacterial Infection, Bronchitis, Endocarditis, Gastroenteritis, Intraabdominal Infection, Kidney Infections, Leptospirosis, Meningitis, Otitis Media, Peritonitis, Pharyngitis, Pneumonia, Prevention of Perinatal Group B Streptococcal Disease, Septicemia, Shigellosis, Sinusitis, Skin or Soft Tissue Infection, Surgical Prophylaxis, Typhoid Fever, Upper Respiratory Tract Infection, Urinary Tract Infection.

Side Effect

Possible side effects of Ampen include: ; ; ; ; ; .

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Why is this medication prescribed?

Ampen is used to treat certain infections that are caused by bacteria such as meningitis (infection of the membranes that surround the brain and spinal cord); and infections of the throat, sinuses, lungs, reproductive organs, urinary tract, and gastrointestinal tract. Ampen is in a class of medications called penicillins. It works by killing bacteria.

Antibiotics such as Ampen will not work for colds, flu, or other viral infections. Taking antibiotics when they are not needed increases your risk of getting an infection later that resists antibiotic treatment.

What is Ampen (Omnipen, Principen, Totacillin)?

Ampen is a penicillin antibiotic that is used to treat or prevent many different types of infections such as bladder infections, pneumonia, gonorrhea, meningitis, or infections of the stomach or intestines.

Ampen may also be used for purposes not listed in this medication guide.

What is Ampen?

Ampen is an antibiotic used for treating bacterial infections.

Generic Name: Ampen (oral) (am pi SIL in)Brand Name:

Medically reviewed by on May 2, 2019 – Written by Cerner Multum

GENERIC NAME(S): Ampen Sodium

OTHER NAME(S): Ampen Sodium Solution, Reconstituted (Recon Soln)

Ampen 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.

How should this medicine be used?

Ampen comes as a capsule and a suspension (liquid) to take by mouth. It is usually taken three to four times a day, either half an hour before or two hours after meals. The length of your treatment depends on the type of infection that you have. Take Ampen at around the same times every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take Ampen exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Shake the suspension well before each use to mix the medication evenly.

The medication should be taken with a full glass of water.

You should begin to feel better during the first few days of treatment with Ampen. If your symptoms do not improve or get worse, call your doctor.

Take Ampen until you finish the prescription, even if you feel better. If you stop taking Ampen too soon or skip doses, your infection may not be completely treated and the bacteria may become resistant to antibiotics.

Some side effects can be serious. If you experience any of the following symptoms, stop taking Ampen and call your doctor immediately or get emergency medical treatment:

  • rash
  • itching
  • hives
  • difficulty breathing or swallowing
  • wheezing
  • severe diarrhea (watery or bloody stools) that may occur with or without fever and stomach cramps (may occur up to 2 months or more after your treatment)
  • a return of fever, cough, sore throat, chills, and other signs of infection

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online ( or by phone (1-800-332-1088).

Before taking this medicine

You should not use Ampen if you are allergic to Ampen or any similar antibiotic, such as amoxicillin (Amoxil, Augmentin, Moxatag, and others), dicloxacillin, nafcillin, or penicillin.

Tell your doctor if you have ever had:

kidney disease; or

an allergy to a cephalosporin antibiotic.

Tell your doctor if you are pregnant.

Ampen can make birth control pills less effective. Ask your doctor about using non hormonal birth control (condom, diaphragm with spermicide) to prevent pregnancy.

You should not breast-feed while using Ampen.

Do not give this medicine to a child without medical advice.

Ampen, drug used in the treatment of various infections, including otitis media (middle ear infection), sinusitis, and acute bacterial cystitis. Ampen (or alpha-aminobenzylpenicillin) is a semisynthetic penicillin, one of the first such antibiotics developed. Similar in action to penicillin G but more effective against gram-negative bacteria, Ampen is more stable in stomach acids and therefore may be given orally.

The potential s > allergic reactions ranging from skin rashes and hives to life-threatening anaphylactic shock (very rare). People who are allergic to other drugs in this family are also likely to react to Ampen. The incidence of skin rash is higher with Ampen than with other penicillins, a factor that suggests a possible toxic reaction as well as a truly allergic response.


PRINCIPEN Capsules (Ampen Capsules) and PRINCIPEN for Oral Suspension (Ampen for Oral Suspension) are indicated in the treatment of infections caused by susceptible strains of the designated organism listed below;

Infections of the Genitourinary Tract Including Gonorrhea: E. coli, P. mirabilis , enterococci, Shigella, S. typhosa and other Salmonella, and nonpenicillinase-producing N. gononhoeae .

Infections of the Respiratory Tract: Nonpenicillinase-producing H. influenzae and staphylococci, and streptococci including streptococcus pneumoniae .

Infections of the Gastrointestinal Tract: Shigella, S. typhosa and other Salmonella, E. coli, P. mirabilis , and enterococci.

Bacteriology studies to determine the causative organisms and their sensetivity to Ampen should be performed. Therapy may be instituted prior to the results of susceptibility testing.

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