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Prevpac Oral

Generic Name: LANSOPRAZOLE/AMOXICILLIN/CLARITHROMYCIN - ORAL
Pronounced: (lan-SO-pruh-zole/uh-mox-eh-SILL-in/kluh-RITH-row-MY-sin)

Prevpac Oral Side Effects

Diarrhea, headache, nausea, vomiting, and abnormal taste may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these rare but very serious side effects occur:

  • muscle weakness
  • change in the amount of urine
  • dark urine
  • yellowing eyes/skin
  • easy bruising/bleeding
  • signs of infection (such as fever, persistent sore throat)
  • mental/mood changes (such as agitation, confusion)


Seek immediate medical attention if any of these rare but very serious side effects occur:

  • severe dizziness
  • fainting
  • fast/irregular heartbeat


This medication may rarely cause a severe intestinal condition (Clostridium difficile-associated diarrhea) due to a type of resistant bacteria. This condition may occur during treatment or weeks to months after treatment has stopped. Do not use anti-diarrhea products or narcotic pain medications if you have any of the following symptoms because these products may make them worse. Tell your doctor immediately if you develop:

  • persistent diarrhea
  • abdominal or stomach pain/cramping
  • blood/mucus in your stool


Use of this medication for prolonged or repeated periods may result in oral thrush or a new yeast infection. Contact your doctor if you notice white patches in your mouth, a change in vaginal discharge, or other new symptoms.

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including:

  • rash
  • itching/swelling (especially of the face/tongue/throat)
  • severe dizziness
  • trouble breathing


Amoxicillin can commonly cause a mild rash that is usually not serious. However, you may not be able to tell it apart from a rare rash that could be a sign of a severe allergic reaction. Therefore, seek immediate medical attention if you develop any rash.

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