Xarelto

Medical Indications

Xarelto is an anticoagulant medication used to prevent and treat various conditions related to blood clots. It is commonly prescribed for the following purposes:

• Treating and Preventing DVT and PE: It treats deep vein thrombosis (clots in the legs) and pulmonary embolism (clots in the lungs). It is also used to reduce the risk of these clots happening again.
• Stroke Prevention: It is used to lower the risk of stroke and systemic embolism in people with nonvalvular atrial fibrillation, a type of irregular heartbeat.
• Post-Surgical Care: It helps prevent blood clots in patients who have had hip or knee replacement surgery.
• Cardiovascular Protection: In combination with aspirin, it is used to reduce the risk of serious heart problems, such as heart attack or stroke, in adults with chronic coronary artery disease or peripheral artery disease.
• Pediatric Use: It is used in children from birth to less than 18 years of age to treat and prevent the recurrence of blood clots.

How Xarelto Works

Xarelto is a type of medicine called a selective Factor Xa inhibitor. It works by interfering with the body's natural blood-clotting process to help prevent dangerous clots from forming.

Blood clotting involves a sequence of steps known as the coagulation cascade. During this process, various proteins called clotting factors are activated one after another. Factor Xa is a critical protein in this chain. Its primary job is to help create thrombin, which is the enzyme that ultimately turns blood into a solid clot.

When Xarelto enters the bloodstream, it binds directly to Factor Xa and blocks its activity. By stopping Factor Xa, the medication prevents the production of thrombin. Without enough thrombin, the blood cannot easily form the fibrin mesh needed to create a stable clot.

This mechanism helps to:

• Prevent new blood clots from forming in the veins or arteries.
• Stop existing blood clots from getting any larger, allowing the body to naturally break them down over time.
• Reduce the risk of stroke by preventing clots from forming in the heart and traveling to the brain.

Common Side Effects

The most frequently reported side effect of Xarelto is bleeding. Other common side effects may include:

• Easy bruising or minor bleeding, such as nosebleeds or bleeding gums
• Back pain
• Dizziness or fainting
• Muscle spasms
• Pain in the arms or legs
• Itching or skin rash
• Stomach pain or indigestion

Serious Side Effects

Some side effects can be severe and require immediate medical care. Seek help right away if you experience:

• Signs of serious bleeding: This includes bleeding that will not stop, coughing up blood, vomit that looks like coffee grounds, or stools that are black, tarry, or bright red.
• Internal bleeding symptoms: Pink or brown urine, or unusually heavy menstrual bleeding.
• Neurological symptoms: Numbness, tingling, or muscle weakness, especially in the legs or feet.
• Allergic reactions: Symptoms such as hives, skin rash, swelling of the face or throat, and difficulty breathing.

This is not a complete list of all possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

Boxed Warnings

Premature Discontinuation: Stopping Xarelto earlier than recommended by a healthcare provider increases the risk of serious blood clots or stroke. If the medication must be stopped for a reason other than significant bleeding, another blood-thinning medication may be necessary to prevent clots from forming.

Spinal or Epidural Hematoma: When Xarelto is used during spinal anesthesia or a spinal puncture, there is a risk of developing a blood clot around the spine (hematoma). This can cause permanent paralysis. The risk is higher for those with indwelling epidural catheters, those taking other medications that affect blood clotting like NSAIDs, or those with a history of spinal surgery or deformity.

Risk of Bleeding

Xarelto can cause serious and sometimes fatal bleeding because it prevents blood from clotting. The risk of bleeding is higher when taken with other medications such as aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs), or certain antidepressants. Medical attention should be sought immediately for signs of internal bleeding, such as:

• Unexpected or prolonged bleeding or bruising.
• Red, pink, or brown urine.
• Bright red or black, tarry stools.
• Coughing up blood or vomit that looks like coffee grounds.
• Headaches, dizziness, or weakness.

Other Precautions

Artificial Heart Valves: Xarelto is not recommended for people with prosthetic (artificial) heart valves, as its safety and effectiveness have not been established for this group.

Antiphospholipid Syndrome: This medication is generally not recommended for patients with triple-positive antiphospholipid syndrome (APS) due to an increased risk of recurrent blood clots compared to other treatments.

Kidney and Liver Problems: The use of Xarelto may need to be adjusted or avoided in individuals with significant kidney or liver disease, as these conditions can affect how the body processes the drug. It is generally avoided in patients with moderate to severe liver impairment associated with blood clotting disorders.

Pregnancy

There is limited information regarding the safety of Xarelto during pregnancy. Using this medication while pregnant may increase the risk of severe bleeding for both the mother and the unborn baby. Healthcare providers typically only prescribe Xarelto during pregnancy if the potential benefit justifies the potential risk to the fetus.

If you are pregnant or planning to become pregnant, talk to your doctor about the risks and benefits of using Xarelto. It is important to notify your healthcare provider immediately if you become pregnant while taking this medication.

Breastfeeding

It is currently unknown whether Xarelto passes into human breast milk or how it might affect a nursing infant. Because of the potential for serious adverse reactions in a breastfed child, breastfeeding is generally not recommended while taking this medication. Consult with a healthcare professional to determine the best way to feed your baby while undergoing treatment.

Dosage Forms

Xarelto is available in two primary forms for oral administration:

• Oral Tablets: These are the standard form of the medication and are taken by mouth.
• Oral Suspension: This is a liquid form of the medication. It is often used for children or for adults who are unable to swallow tablets.

The appropriate form is determined by a healthcare provider based on the patient's age, weight, and the condition being treated.

FDA Approval and Indications

Xarelto (rivaroxaban) is approved by the U.S. Food and Drug Administration (FDA) for several conditions related to blood clotting. It is indicated for the treatment and prevention of deep vein thrombosis (DVT) and pulmonary embolism (PE), and to reduce the risk of stroke and systemic embolism in patients with nonvalvular atrial fibrillation. It is also used for clot prevention following hip or knee replacement surgery and to reduce the risk of major cardiovascular events in patients with chronic coronary or peripheral artery disease.

In 2021, the FDA expanded the drug's approval to include pediatric patients from birth to less than 18 years old. It is used in this population to treat venous blood clots and reduce the risk of clots recurring after at least five days of initial blood thinner treatment.

Boxed Warnings

The FDA has issued boxed warnings for Xarelto regarding two significant safety risks:

• Premature Discontinuation: Stopping Xarelto earlier than instructed by a healthcare provider increases the risk of serious blood clots and stroke. If the medication must be stopped for reasons other than bleeding, another anticoagulant may be necessary.
• Spinal or Epidural Hematoma: Patients who receive spinal anesthesia or undergo a spinal puncture while taking Xarelto are at risk of developing a blood clot near the spine. These hematomas can cause long-term or permanent paralysis.

Factors Influencing Cost

The amount you pay for Xarelto can vary based on the following:

• Insurance Coverage: Your out-of-pocket costs are largely determined by your health insurance plan's formulary, deductible, and copay requirements.
• Dosage and Treatment Duration: The strength of the tablets and the length of your prescription will impact the total price.
• Pharmacy Selection: Prices may differ between local retail pharmacies and mail-order pharmacy services.

Generic Availability

The FDA has approved generic versions of rivaroxaban (the active ingredient in Xarelto). However, these generics may not be widely available in all pharmacies yet due to patent protections and legal agreements. Generic medications are typically less expensive than brand-name drugs.

Financial Assistance

Patients who have difficulty affording their medication may have access to various support options:

• Manufacturer Savings: The drug manufacturer may offer savings cards or coupons for eligible patients with commercial insurance to help reduce copayments.
• Patient Assistance Programs: Programs may be available to provide the medication at a lower cost or for free to individuals who are uninsured or meet specific income guidelines.