Bismuth subcitrate potassium, metronidazole, and tetracycline

Generic name: Bismuth Subcitrate Potassium, Metronidazole, And Tetracycline
Brand names: Pylera
Dosage form: oral capsule (140 mg-125 mg-125 mg)
Drug class: H. pylori eradication agents

Usage of Bismuth subcitrate potassium, metronidazole, and tetracycline

Bismuth suBCitrate potassium, metronidazole, and tetracycline (Pylera) is a combination medicine used to treat peptic ulcer (duodenal ulcer) with Helicobacter pylori infection. Pylera is usually given together with omeprazole (Prilosec).

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

Bismuth subcitrate potassium, metronidazole, and tetracycline side effects

Stop taking Pylera and get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).

Bismuth subcitrate potassium, metronidazole, and tetracycline may cause serious side effects. Call your doctor at once if you have:

  • severe stomach pain, diarrhea that is watery or bloody (even if it occurs months after your last dose);
  • dizziness, problems with speech or coordination;
  • fever, neck stiffness, increased sensitivity to light, nausea, vomiting.
  • a seizure;
  • vaginal itching or discharge;
  • numbness or tingling in your arms and legs; or
  • increased pressure inside the skull--severe headaches, ringing in your ears, dizziness, nausea, vision problems, pain behind your eyes.
  • If you have Cockayne syndrome, stop taking Pylera and call your doctor right away if you have signs of liver problems such as stomach pain, nausea, clay-colored stools, or yellowing of your skin or eyes.

    Pylera may cause your tongue to become darker in color. It may also cause your stools to appear black in color. These are harmless and temporary side effects.

    Common side effects of bismuth subcitrate potassium, metronidazole, and tetracycline may include:

  • diarrhea or other changes in your stools;
  • nausea; or
  • headache.
  • This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

    Before taking Bismuth subcitrate potassium, metronidazole, and tetracycline

    You should not use Pylera if you are allergic to bismuth subcitrate potassium, metronidazole, or tetracycline, or if:

  • you have severe kidney disease;
  • you drink alcohol daily;
  • you regularly consume foods or medicines that contain propylene glycol;
  • you took disulfiram (Antabuse) within the past 14 days; or
  • you also use methoxyflurane.
  • Tell your doctor if you have ever had:

  • kidney disease;
  • liver disease;
  • Cockayne syndrome (a rare genetic disorder);
  • a blood cell disorder; or
  • any type of infection.
  • Metronidazole has caused cancer in animal studies. It is not known whether this would occur in humans taking Pylera. Ask your doctor about your risk.

    Do not use Pylera if you are pregnant. Tetracycline can cause permanent tooth discoloration and affect growth in the baby.

    Pylera can make birth control pills less effective. Ask your doctor about other birth control options such as an injection, implant, skin patch, vaginal ring, condom, diaphragm, cervical cap, or contraceptive sponge.

    You should not breastfeed within 2 days after using Pylera. If you use a breast pump during this time, throw out any milk you collect. Do not feed it to your baby.

    Not approved for use by anyone younger than 18 years old.

    Relate drugs

    How to use Bismuth subcitrate potassium, metronidazole, and tetracycline

    Usual Adult Dose for Helicobacter pylori Infection:

    Bismuth subcitrate potassium 420 mg-metronidazole 375 mg-tetracycline 375 mg orally 4 times a day (after meals and at bedtime)-Duration of therapy: 10 daysComments:-Omeprazole 20 mg should be given orally 2 times a day during treatment (after morning and evening meals).-Helicobacter pylori eradication has been shown to reduce duodenal ulcer recurrence risk.Use: Eradication of H pylori infection in patients with active or a history (e.g., within 5 years) of duodenal ulcer infection and/or disease


    Do not drink alcohol or consume foods or medicines that contain propylene glycol while you are taking Pylera and for at least 3 days after you stop taking it.

    Metronidazole has caused cancer in animal studies. It is not known whether this would occur in humans taking Pylera.

    What other drugs will affect Bismuth subcitrate potassium, metronidazole, and tetracycline

    Sometimes it is not safe to use certain medicines at the same time. Some drugs can affect your blood levels of other drugs you use, which may increase side effects or make the medicines less effective.

    Tell your doctor about all your current medicines. Many drugs can affect Pylera, especially:

  • cimetidine;
  • an antidepressant;
  • asthma medication;
  • Busulfan or other cancer medicine;
  • heart or blood pressure medication;
  • lithium or other antipsychotic medicine;
  • medicine to treat malaria, HIV, or other infection;
  • a blood thinner--warfarin, Coumadin, Jantoven; or
  • seizure medicine--phenytoin or phenobarbital.
  • This list is not complete and many other drugs may affect Pylera. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.


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    The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. does not assume any responsibility for any aspect of healthcare administered with the aid of information provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

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