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Principen vs. Amoxil (amoxicillin)

Reviewed on 1/24/2019

Are Principen and Amoxil (amoxicillin) the Same Thing?

Principen (ampicillin) and Amoxil (amoxicillin) are penicillin-type antibiotics used to treat many different types of infections caused by bacteria.

Side effects of Principen and Amoxil (amoxicillin) that are similar include nausea, vomiting, stomach pain, diarrhea, vaginal itching or discharge, headache, or swollen, black, or "hairy" tongue.

Side effects of Principen that are different from Amoxil (amoxicillin) include mouth/tongue sores or oral thrush (white patches inside your mouth or throat).

Side effects of Amoxil (amoxicillin) that are different from Principen include rash.

What Are Possible Side Effects of Principen?

Common side effects of Principen include:

  • nausea,
  • vomiting,
  • stomach pain,
  • diarrhea,
  • vaginal itching or discharge,
  • headache,
  • mouth/tongue sores,
  • thrush (white patches inside your mouth or throat), or
  • swollen, black, or "hairy" tongue.

Tell your doctor if you have rare but very serious side effects of Principen including:

  • dark urine,
  • persistent nausea or vomiting,
  • yellowing eyes or skin,
  • easy bruising or bleeding, or
  • persistent sore throat or fever.

What Are Possible Side Effects of Amoxil (amoxicillin)?

Common side effects of Amoxil (amoxicillin) include:

  • mild headache (not a migraine),
  • pain or chest tightness,
  • pressure or heavy feeling in any part of your body,
  • weakness,
  • feeling hot or cold,
  • dizziness,
  • spinning sensation,
  • drowsiness,
  • nausea,
  • vomiting,
  • drooling,
  • unusual taste in your mouth after using nasal spray,
  • burning/numbness/pain/irritation in your nose or throat after using nasal spray, or
  • flushing (warmth, redness, or tingling under the skin).

What Is Principen?

Principen (ampicillin) is a penicillin-type antibiotic 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. Principen is available in generic form.

What Is Amoxil (amoxicillin)?

Amoxil (amoxicillin) is a penicillin-type antibiotic used to treat infections caused by bacteria that are B-lactamase negative (B-lactamase positive bacteria are usually resistant to Amoxil (amoxicillin)); these infections usually occur in the skin, lungs, urinary tract and eye, ears, nose, and throat. Amoxil (amoxicillin) is available as a generic drug termed amoxicillin. Amoxil (amoxicillin) may be combined with other drugs (for example, clavulanic acid [Augmentin]), to make the antibiotic more effective.

QUESTION

Bowel regularity means a bowel movement every day. See Answer

What Drugs Interact With Principen?

Principen may interact with allopurinol, methotrexate, sulfa drugs, or tetracycline antibiotics. Tell your doctor all medications you are taking. Principen should be used only when prescribed during pregnancy. This medication passes into breast milk. Consult your doctor before breastfeeding.

What Drugs Interact With Amoxil (amoxicillin)?

Amoxil (amoxicillin) may interact with probenecid, blood thinners, other antibiotics, or sulfa drugs. Tell your doctor all medications and supplements you use. Treatment in pregnant women and women who are breastfeeding should be done with caution.

How Should Principen Be Taken?

The usual oral dose range of Principen for most infections is 250 to 500 mg 4 times daily for 7-14 days. To treat gonorrhea, a single 3.5 g dose is administered along with probenecid.

How Should Amoxil (amoxicillin) Be Taken?

Amoxil (amoxicillin) is available in many preparations (capsules, tablets, chewable tablets, powder for oral suspension and pediatric oral suspension).

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References
SOURCE:

DailyMed. Principen (ampicillin) Product Information.

https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=da8da9c0-fa46-40d3-82c6-1a18ffa1b585

DailyMed. Amoxil (amoxicillin) Product Information.

https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=375cdfd0-7996-5a42-e054-00144ff88e88
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