Prevymis (letermovir)

What is Prevymis?

Prevymis (letermovir) is a prescription medication that helps prevent cytomegalovirus (CMV) infection and disease in transplant recipients.

CMV is a common virus that can cause serious health problems in people with weakened immune systems, such as those who have had a stem cell or kidney transplant.

Prevymis is used in adults and children at least six months old and weighing at least 6 kg (13.2 lbs) who have received an allogeneic hematopoietic stem cell transplant (HSCT). This type of transplant replaces damaged bone marrow with healthy stem cells from a donor, and patients with CMV are at a higher risk of complications.

Prevymis is prescribed for adults and children over 12 years old and weighing 40 kg (88.2 lbs) who received a kidney transplant from a CMV-positive donor.

How Does Prevymis Work?

Prevymis stops cytomegalovirus (CMV) from becoming active in the body. Although many people have CMV, it usually stays inactive unless the immune system is weak.

This can happen after a stem cell or kidney transplant when the body tries to accept the new organ or cells. Prevymis is an antiviral medication that targets CMV and prevents it from multiplying, reducing the risk of infection and disease.

Unlike some other CMV treatments, Prevymis does not harm the bone marrow, which is important for making healthy blood cells.

It is designed to be effective with fewer side effects, making it safer for patients recovering from transplants.

Dosing Information and Usage

Prevymis is available in various dosage forms, including tablets, oral pellets, and injections.

Prevymis dosing depends on the patient’s age and medical condition.

Dosage Form and Strengths of Prevymis

Prevymis is available in different strengths to suit various dosing needs. Prevymis dosing should follow medical recommendations.

• Tablets: 480 mg, 240 mg
• Oral Pellets: 120 mg per packet
• Injection: 240 mg/12 mL (20 mg/mL) in a single-dose vial

Prevymis Administration

Prevymis can be administered in different forms, each with specific instructions. Tablets should be taken orally, with or without food, and swallowed whole without crushing or chewing.

Oral pellets can be mixed with soft food or administered through a nasogastric (NG) or gastric (G) tube. Like tablets, oral pellets should not be crushed or chewed.

The Prevymis injection must be diluted before being used for intravenous administration. It should be administered through a sterile 0.2-micron or 0.22-micron polyethersulfone (PES) in-line filter via intravenous infusion over one hour.

It is important not to administer the injection as an intravenous bolus.

If you are taking Prevymis tablets:

• Swallow the tablet whole with or without food.
• Do not break, crush, or chew it.

If you are using Prevymis oral pellets:

• Mix the pellets with a small amount of soft food before consumption.
• Alternatively, administer them through a feeding tube (NG or G tube).
• Do not crush or chew the pellets.

For the Prevymis injection:

• Dilute the solution as instructed by your healthcare provider.
• Use a sterile in-line filter during administration.
• Infuse over 1 hour via IV. Do not administer as a rapid injection or IV bolus.

Prevymis Storage

• Keep Prevymis tablets in their original packaging to protect them from moisture. Store them at room temperature. Avoid placing them in humid or hot areas like bathrooms or near windows.
• Store the pellets in their original packets until you need to use them. Keep them at room temperature.
• Store the injection vials in their original cartons to shield them from light. Once diluted, the solution can be stored in the refrigerator for up to 24 hours at room temperature or up to 48 hours.

Remember, keep all medications out of children’s reach and dispose of unused or expired medication responsibly.

Prevymis Side Effects

Prevymis’s side effects can range from mild to severe. Common side effects include nausea, diarrhea, vomiting, headache, cough, swelling in the arms and legs, and tiredness. Some people may also experience stomach pain.

In kidney transplant patients, the most common side effect is diarrhea. Severe side effects, though less common, may include liver problems, allergic reactions, or abnormal heart rhythms.

If you notice any severe symptoms, seek medical help right away.

Common Side Effects

• Nausea
• Diarrhea
• Vomiting
• Headache
• Cough
• Swelling in the arms and legs
• Tiredness
• Stomach pain

Severe Side Effects

• Liver problems (yellowing skin or eyes, dark urine)
• Allergic reactions (rash, swelling, trouble breathing)
• Abnormal heart rhythm
• Severe diarrhea or dehydration
• Severe stomach pain

If you experience any severe Prevymis side effects, contact your doctor immediately.

Warnings and Precautions

Prevymis can cause serious side effects, including drug interactions that may lead to adverse reactions or make the medication less effective.

The intravenous (IV) form contains an ingredient that may build up in the body, especially in people with kidney problems.

Pregnant women should be cautious because animal studies have shown potential harm to unborn babies. Below are important warnings and precautions for using Prevymis:

• Taking Prevymis with certain other medications may cause harmful drug interactions or make either medication less effective.
• The IV form contains hydroxypropyl betadex, which can accumulate in people with kidney problems and may cause harm.
• Patients receiving the IV form should switch to oral Prevymis as soon as possible, and IV treatment should not exceed four weeks.
• Pregnant women should use caution, as animal studies have shown potential risks to the fetus.
• It is unknown if Prevymis passes into breast milk or if it affects nursing babies.
• Children under six months (for stem cell transplant patients) or under 12 years (for kidney transplant patients) should not use Prevymis.
• Older adults (65+) generally tolerate Prevymis well, with no major differences in safety or effectiveness.
• Patients with severe liver disease should avoid Prevymis, as its effects are unknown in these cases.
• Monitor patients with severe kidney disease or those on dialysis closely when they use the IV form, as hydroxypropyl betadex may build up in the body.

Drug Interactions With Other Medications

Prevymis (letermovir) can interact with various medications, affecting how they work or how other drugs work in the body.

Some interactions may require dosage adjustments or close monitoring, while other medications should be avoided altogether.

Below is a list of medications that may interact with Prevymis.

• Anti-arrhythmic agents (amiodarone)
• Antibiotics (nafcillin)
• Anticoagulants (warfarin)
• Anticonvulsants (carbamazepine, phenobarbital, phenytoin)
• Antidiabetic agents (glyburide, repaglinide, rosiglitazone)
• Antifungals (voriconazole)
• Antimycobacterials (rifabutin, rifampin)
• Antipsychotics (pimozide, thioridazine)
• Endothelin antagonists (bosentan)
• Ergot alkaloids (ergotamine, dihydroergotamine)
• Herbal products (St. John’s wort)
• HIV medications (efavirenz, etravirine, nevirapine)
• HMG-CoA reductase inhibitors (atorvastatin, pitavastatin, simvastatin, fluvastatin, lovastatin, pravastatin, rosuvastatin)
• Immunosuppressants (cyclosporine, sirolimus, tacrolimus)
• Proton pump inhibitors (omeprazole, pantoprazole)
• Wakefulness-promoting agents (modafinil)
• CYP3A substrates (alfentanil, fentanyl, midazolam, quinidine)

Prevymis Alternatives

If you are looking for alternatives to Prevymis, several medications that work for similar conditions, such as CMV prophylaxis, are available.

These alternatives to Prevymis may offer different benefits or be more suitable for specific patient needs.

Always consult with your doctor to choose the best option for you.

Here are some Prevymis alternatives:

• Valcyte (valganciclovir)
• Cytovene (ganciclovir)
• CytoGam (cytomegalovirus immune globulin)

Order Affordable Prevymis from Canada and Save

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How to Order Prevymis Online?

1. To order Prevymis, use the search bar to find and add it to your cart. If you need other medications, continue adding them.
2. At checkout, enter your contact, payment, and shipping details. New customers should create an account, and returning customers can log in. Use the Prevymis coupon code PGSAVE10 for a 10% discount on your first purchase. Submit your order, and you will receive a confirmation email.
3. Upload or send your prescription by email to info@pharmagiant.com or fax it to 1-888-562-8159. If no prescription is required, your order will be processed without it.

Frequently Asked Questions

Disclaimer

Pharma Giant provides medical information to help you better understand medications and medical conditions.This content is for informational use only and does not replace advice from a licensed medical practitioner. Consult your doctor or pharmacist before starting or changing any medication. All our partners follow strict safety standards set by their country’s health authorities to make sure you receive safe and high-quality medications.