Ticagrelor

Primary Uses

Ticagrelor is primarily prescribed to prevent serious or life-threatening problems with the heart and blood vessels. It is commonly used for the following conditions:

• Acute Coronary Syndrome (ACS): This includes people who have recently had a heart attack or severe chest pain (unstable angina).
• History of Heart Attack: It may be used long-term in patients who have a history of a heart attack to reduce the risk of having another one.
• Coronary Artery Disease (CAD): It is used in certain patients with CAD who are at high risk for a first heart attack or stroke.
• Stroke and TIA: It may be used in people who have had a certain type of stroke (acute ischemic stroke) or a "mini-stroke" (transient ischemic attack or TIA) to prevent a future stroke.

Stent Protection

Ticagrelor is also used to prevent blood clots from forming in stents, which are small tubes placed in the heart's arteries to keep them open after a medical procedure.

Combination Therapy

In most cases, this medication is used in combination with a low dose of aspirin to help keep blood flowing smoothly through the body and prevent platelets from sticking together.

Preventing Blood Clots

Ticagrelor belongs to a group of medicines known as antiplatelet agents. Its primary job is to keep platelets—tiny cells in your blood—from clumping together. While clotting is a normal process that helps stop bleeding after an injury, unwanted clots can form inside blood vessels that have been narrowed by heart disease.

How It Targets Platelets

To form a clot, platelets must receive chemical signals that tell them to stick to one another. Ticagrelor works by blocking a specific receptor on the surface of the platelets called the P2Y12 receptor. By sitting on this receptor, the medication prevents the chemical signals from activating the platelets.

When these signals are blocked:

• Platelets stay slippery: They are less likely to stick to each other or to the walls of blood vessels.
• Clot formation is reduced: This lowers the risk of a blood clot blocking blood flow to the heart, which could cause a heart attack, or to the brain, which could cause a stroke.
• Blood flows more freely: This is especially important for people who have recently had a heart attack or have had a stent placed in a coronary artery to keep it open.

Unlike some other antiplatelet medications that permanently disable the platelets they interact with, the effects of ticagrelor are reversible. This means that once the medication is stopped and cleared from the bloodstream, the platelets can eventually regain their ability to clump together normally.

Common Side Effects

Many people taking ticagrelor experience mild side effects as their body adjusts to the medication. Common side effects include:

• Shortness of breath (dyspnea)
• Easy bruising or minor bleeding, such as nosebleeds
• Dizziness or lightheadedness
• Headache
• Nausea
• Diarrhea

Serious Side Effects

Ticagrelor prevents blood from clotting, which increases the risk of serious bleeding. Seek medical attention immediately if you experience any of the following:

• Bleeding that will not stop
• Blood in the urine (pink, red, or brown)
• Bloody or black, tarry stools
• Coughing up blood or vomit that looks like coffee grounds
• Signs of a stroke, such as sudden numbness or weakness, confusion, or vision problems
• Fainting or an unusually slow heartbeat
• Severe allergic reactions, such as hives, swelling of the face or throat, or difficulty breathing

Bleeding Risk

Ticagrelor increases the risk of bleeding, which can be serious or fatal. Because it prevents blood from clotting, it may take longer than usual to stop bleeding from minor cuts or bruises. It is contraindicated in people with active pathological bleeding, such as a peptic ulcer, or a history of bleeding in the brain (intracranial hemorrhage).

Aspirin Dosage

A boxed warning indicates that maintenance doses of aspirin above 100 mg daily can reduce the effectiveness of ticagrelor. It is typically prescribed with a low-dose aspirin (75 mg to 100 mg) to maintain its efficacy.

Shortness of Breath

Shortness of breath (dyspnea) is a common side effect. While often mild and temporary, persistent or severe breathing difficulties should be reported to a healthcare provider. This symptom usually does not require stopping the medication.

Surgery and Procedures

To minimize the risk of excessive bleeding during surgery, healthcare providers usually recommend stopping ticagrelor five days before any planned surgical procedure. The medication should be restarted as soon as the risk of bleeding is managed.

Heart Rhythm Issues

Ticagrelor may cause a slow heart rate (bradyarrhythmia). Caution is advised for patients with a history of heart rhythm problems, such as sick sinus syndrome or certain types of heart block, unless they have a permanent pacemaker.

Other Precautions

• Liver Impairment: Use is generally avoided in patients with severe liver disease due to the increased risk of bleeding.
• Uric Acid Levels: Ticagrelor may increase uric acid levels in the blood, which could potentially trigger gout in susceptible individuals.
• Kidney Function: While no dose adjustment is typically needed for kidney disease, monitoring may be necessary in severe cases.

Pregnancy

There is limited information regarding the safety of ticagrelor in pregnant women, as adequate and well-controlled studies have not been conducted in humans. In animal studies, high doses of the medication were associated with fetal structural abnormalities and reduced birth weight. Ticagrelor should be used during pregnancy only if the potential benefit to the mother justifies the potential risk to the fetus.

If you are pregnant or planning to become pregnant, discuss the risks and benefits of this treatment with your healthcare provider.

Breastfeeding

It is unknown if ticagrelor or its metabolites are present in human breast milk. Research in animals has shown that the drug is excreted in milk. Because of the risk of serious adverse reactions in nursing infants, such as bleeding, a decision must be made whether to discontinue breastfeeding or discontinue the medication. This decision should take into account the importance of the drug to the mother's medical treatment.

Dosage Forms

Ticagrelor is available as an oral tablet. These tablets are designed to be swallowed whole. For patients who have difficulty swallowing, the tablets may be crushed and mixed with water, or administered through a nasogastric tube by a healthcare professional.

FDA Approval and Indications

Ticagrelor was approved by the U.S. Food and Drug Administration (FDA) to help prevent cardiovascular death, heart attack, and stroke in patients with acute coronary syndrome (ACS) or a history of heart attack. It is also indicated to reduce the risk of a first heart attack or stroke in high-risk patients with coronary artery disease and to reduce the risk of stroke in certain patients who have experienced an acute ischemic stroke or transient ischemic attack (TIA).

Boxed Warning

The FDA has issued a boxed warning for ticagrelor due to the following risks:

• Bleeding Risk: Like other antiplatelet agents, ticagrelor can cause significant, and sometimes fatal, bleeding. It should not be used in patients with active pathological bleeding or a history of intracranial hemorrhage.
• Aspirin Dosage: Maintenance doses of aspirin above 100 mg daily decrease the effectiveness of ticagrelor. For most patients, ticagrelor should be used with a daily maintenance dose of aspirin between 75 mg and 100 mg.
• Surgery: Ticagrelor should generally be discontinued five days prior to any surgery to reduce the risk of bleeding.

Contraindications

Ticagrelor is contraindicated in patients with a history of intracranial hemorrhage, active pathological bleeding (such as a peptic ulcer), or severe hepatic impairment due to the increased risk of bleeding.

Factors Affecting Cost

The price of ticagrelor can vary significantly based on several factors:

• Generic vs. Brand Name: Ticagrelor is available as a generic medication and as the brand-name drug Brilinta. Generic versions typically cost less than brand-name versions.
• Insurance Coverage: Most health insurance plans, including Medicare Part D, cover ticagrelor. However, your specific out-of-pocket costs will depend on your plan's formulary, copay tiers, and deductibles.
• Dosage and Quantity: Ticagrelor is usually taken twice daily. The total cost will depend on the strength prescribed (60 mg or 90 mg) and whether you purchase a 30-day or 90-day supply.
• Pharmacy Selection: Prices may differ between local retail pharmacies, mail-order pharmacies, and specialty pharmacies.

Financial Assistance Options

If you have difficulty affording your medication, there may be resources available to help manage the cost:

• Manufacturer Savings: For the brand-name version, the manufacturer may offer savings cards or coupons for patients with commercial insurance that can reduce copayments.
• Patient Assistance Programs: Some programs provide medications at a lower cost or for free to individuals who meet specific income requirements or do not have insurance.
• Generic Substitution: Choosing the generic version of ticagrelor is often the most effective way to lower the cost of the prescription.