PrevPac combines lansoprazole, a proton pump inhibitor, as a delayed-release capsule, with amoxicillin, a penicillin class antibacterial, in capsule form, and clarithromycin, a macrolide antimicrobial, as a tablet. It is available in a daily administration card containing two lansoprazole 30 mg capsules, four amoxicillin 500 mg capsules, and two clarithromycin 500 mg tablets for oral use. Lansoprazole is intended to reduce stomach acid, while amoxicillin and clarithromycin are intended to address infections caused by bacteria.

How should I use this medication?

Take these medications by mouth with a full glass of water. Each dose should be taken twice per day before eating. Follow the directions on the prescription label. Do not crush or chew. Take your doses at regular intervals. Do not take your medication more often than directed. Do not skip doses or stop your medication early even if you feel better. Do not stop taking except on your care team's advice.

Talk to your care team about the use of this medication in children. Special care may be needed.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

Where should I keep my medication?

Keep out of the reach of children and pets.

Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F). Protect from light and moisture. Throw away any unused medication after the expiration date.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible:

• Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
• Heart rhythm changes—fast or irregular heartbeat, dizziness, feeling faint or lightheaded, chest pain, trouble breathing
• Kidney injury—decrease in the amount of urine, swelling of the ankles, hands, or feet
• Liver injury—right upper belly pain, loss of appetite, nausea, light-colored stool, dark yellow or brown urine, yellowing skin or eyes, unusual weakness or fatigue
• Low magnesium level—muscle pain or cramps, unusual weakness or fatigue, fast or irregular heartbeat, tremors
• Lupus-like syndrome—joint pain, swelling, or stiffness, butterfly-shaped rash on the face, rashes that get worse in the sun, fever, unusual weakness or fatigue
• Rash, fever, and swollen lymph nodes
• Severe diarrhea, fever
• Severe or prolonged vomiting or diarrhea
• Unusual vaginal discharge, itching, or odor

Side effects that usually do not require medical attention (report these to your care team if they continue or are bothersome):

• Change in taste
• Diarrhea
• Headache

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What should I tell my care team before I take this medication?

They need to know if you have any of these conditions:

• Heart disease
• History of irregular heartbeat
• Kidney disease
• Liver disease
• Lupus
• Myasthenia gravis
• An unusual or allergic reaction to lansoprazole, amoxicillin, clarithromycin, other antibiotics, other medications, foods, dyes, or preservatives
• Pregnant or trying to get pregnant
• Breast-feeding

What may interact with this medication?

Do not take this medication with any of the following:

• Certain medications for cholesterol, such as cerivastatin, lovastatin, simvastatin
• Certain medications for HIV or AIDS, such as atazanavir, nelfinavir, rilpivirine, saquinavir
• Cisapride
• Conivaptan
• Dihydroergotamine, ergotamine
• Dofetilide
• Dronedarone
• Eletriptan
• Eplerenone
• Ergot alkaloids like dihydroergotamine, ergonovine, ergotamine, methylergonovine
• Flibanserin
• Ivabradine
• Lomitapide
• Lurasidone
• Naloxegol
• Pimozide
• Posaconazole
• Ranolazine
• Red yeast rice
• Silodosin
• Tolvaptan
• Thioridazine
• Ziprasidone

This medication may also interact with the following:

• Alfentanil
• Bromocriptine
• Certain medications for anxiety or sleep
• Certain medications for blood pressure
• Certain medications for diabetes
• Certain medications for erectile dysfunction
• Certain medications for fungal infections
• Certain medications for irregular heartbeat
• Certain medications for seizures
• Certain medications that treat or prevent blood clots, such as warfarin
• Cilostazol
• Colchicine
• Cyclosporine
• Digoxin
• Disopyramide
• Erlotinib
• Estrogen or progestin hormones
• Iron supplements
• Methotrexate
• Methylprednisolone
• Mycophenolate
• Other medications for cholesterol
• Other medications for HIV or AIDS
• Other medications for infections
• Other medications that cause heart rhythm changes
• St. John's Wort
• Sucralfate
• Tacrolimus
• Theophylline
• Tolterodine
• Vinblastine

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

Visit your care team for regular check-ups. Tell your care team if your symptoms do not improve or if they get worse.

This medication may cause serious skin reactions. They can happen weeks to months after starting the medication. Contact your care team right away if you notice fevers or flu-like symptoms with a rash. The rash may be red or purple and then turn into blisters or peeling of the skin. Or, you might notice a red rash with swelling of the face, lips or lymph nodes in your neck or under your arms.

Call your care team as soon as you can if you get a fever, watery diarrhea, stomach pain, or vomiting. These could be symptoms of a more serious illness. Do not treat yourself. Call your care team for advice.

Estrogen and/or progestin hormones may not work as well while you are taking this medication. A barrier contraceptive, such as a condom or diaphragm, is recommended if you are using these hormones for contraception. Talk to your care team about other forms of contraception.

If you are diabetic you may get a false-positive result for sugar in your urine. Talk to your care team.

This medication may cause a decrease in vitamin B12. You should make sure that you get enough vitamin B12 while you are taking this medication. Discuss the foods you eat and the vitamins you take with your care team.