Principen vs. Amoxil (amoxicillin)

• Are Principen and Amoxil (amoxicillin) the Same Thing?
• What Are Possible Side Effects of Principen?
• What Are Possible Side Effects of Amoxil (amoxicillin)?
• What Is Principen?
• What Is Amoxil (amoxicillin)?
• What Drugs Interact with Principen?
• What Drugs Interact with Amoxil (amoxicillin)?
• How Should Principen Be Taken?
• How Should Amoxil (amoxicillin) Be Taken?

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.

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.

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).

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.

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.

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.

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.

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.

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