Trokendi XR

Seizure Treatment

Trokendi XR is approved to treat several types of epilepsy in adults and children 6 years of age and older. It may be used alone or in combination with other seizure medications. Specific conditions it treats include:

• Partial-onset seizures: Seizures that start in one specific area of the brain.
• Primary generalized tonic-clonic seizures: Seizures that affect the entire brain.
• Lennox-Gastaut syndrome: A severe form of epilepsy that begins in childhood and causes multiple types of seizures.

Migraine Prevention

This medication is also used to prevent migraine headaches in adults and adolescents 12 years of age and older. It is intended to reduce how often migraines occur rather than treating a headache that has already started. It is not used for the immediate relief of a migraine attack once it has begun.

Mechanism of Action

Trokendi XR contains topiramate, a type of medication known as an anticonvulsant. While the exact way it works is not fully understood, researchers believe it helps manage conditions like epilepsy and migraines by affecting several different processes in the brain.

The medication is thought to work in the following ways:

• Calming nerve activity: It enhances the activity of gamma-aminobutyric acid (GABA), a chemical messenger that helps calm overactive nerves.
• Blocking excitatory signals: It blocks certain receptors for glutamate, a chemical that normally sends excited signals between nerve cells.
• Regulating electrical signals: It affects the movement of sodium into nerve cells, which helps prevent the rapid, repetitive electrical firing that can lead to seizures.

Extended-Release Delivery

Unlike immediate-release versions of topiramate, Trokendi XR is designed to release the medication slowly into the bloodstream over a 24-hour period. This provides a steady level of the drug in the body, which helps maintain its effectiveness throughout the day and night.

For migraine prevention, the medication is used to reduce the frequency of attacks rather than treating a migraine once it has already started. It may take several weeks of consistent use before the full effects on migraine frequency are noticed.

Common Side Effects

Many people taking Trokendi XR experience mild to moderate side effects. These may include:

• Tingling or "pins and needles" sensations in the arms and legs
• Dizziness, drowsiness, or fatigue
• Loss of appetite and weight loss
• Nausea, diarrhea, or stomach pain
• Changes in the way food tastes
• Nervousness or difficulty concentrating
• Slowed thinking or speech problems

Serious Side Effects

Some side effects require immediate medical attention. Serious risks associated with this medication include:

• Vision problems: Sudden blurred vision, eye pain, or redness, which may indicate secondary angle-closure glaucoma.
• Metabolic acidosis: An increase in acid levels in the blood, which can cause rapid breathing, fatigue, or irregular heartbeat.
• Hyperthermia: Decreased sweating and increased body temperature, which can be dangerous, especially in hot weather.
• Kidney stones: Severe pain in the back or side, or blood in the urine.
• Cognitive impairment: Significant confusion, memory problems, or difficulty with coordination.
• Mood changes: New or worsening depression, anxiety, or suicidal thoughts and behaviors.
• High ammonia levels: Increased ammonia in the blood, which may cause mental status changes or vomiting, particularly if taken with certain other medications.

Vision and Eye Problems

Trokendi XR can cause serious eye issues, including a sudden decrease in vision with or without eye pain and redness. This may be caused by secondary angle-closure glaucoma, which can lead to permanent vision loss if not treated promptly.

Metabolic Acidosis

This medication can increase the level of acid in the blood, a condition known as metabolic acidosis. If left untreated, it may cause brittle or soft bones, kidney stones, or slowed growth in children. Healthcare providers typically monitor blood chemistry before and during treatment.

Suicidal Thoughts and Behavior

Like other antiepileptic drugs, Trokendi XR may increase the risk of suicidal thoughts or actions in a small number of people. Monitoring for new or worsening depression, anxiety, or any unusual changes in mood or behavior is important.

Cognitive and Nervous System Effects

Patients may experience confusion, difficulty concentrating, memory problems, or speech and language issues. Dizziness and loss of coordination are also common side effects that can affect daily activities.

Decreased Sweating and Hyperthermia

Trokendi XR can cause decreased sweating and an increase in body temperature (fever). This is especially concerning in hot weather and for children, as it can lead to heat-related illness or hospitalization.

Pregnancy and Fetal Harm

Taking Trokendi XR during pregnancy can cause fetal harm, specifically increasing the risk of cleft lip or cleft palate. Individuals of childbearing potential should discuss effective birth control options with a healthcare provider.

Alcohol Interaction

Alcohol must not be consumed within 6 hours before or 6 hours after taking a dose of Trokendi XR. Alcohol can cause the medication to be released into the bloodstream too quickly, increasing the risk of side effects.

Kidney Stones

There is an increased risk of developing kidney stones while taking this medication. Maintaining high fluid intake is generally recommended to help prevent stone formation.

High Ammonia Levels

High levels of ammonia in the blood can occur, which may lead to mental status changes or low body temperature. This risk is higher when Trokendi XR is taken with valproic acid.

Pregnancy

Taking Trokendi XR during pregnancy increases the risk of major birth defects, particularly oral clefts such as cleft lip or cleft palate. These defects can occur early in the first trimester, sometimes before a person knows they are pregnant. Research also indicates that infants exposed to topiramate in the womb may be born smaller than expected for their gestational age.

Healthcare providers generally recommend using effective birth control while taking this medication. It is important to be aware that Trokendi XR can make some hormonal contraceptives, such as birth control pills, less effective. Discussing the most reliable forms of contraception with a clinician is advised.

If pregnancy occurs while taking Trokendi XR, it is important to contact a healthcare provider immediately. Patients should not stop taking the medication without medical guidance, as stopping suddenly can cause seizures to return or worsen. There is a North American Antiepileptic Drug Pregnancy Registry that monitors outcomes for individuals who take this medication during pregnancy.

Breastfeeding

The active ingredient in Trokendi XR passes into breast milk. While the impact on a nursing infant is not fully established, potential side effects such as diarrhea, drowsiness, or inadequate weight gain may occur. The decision to breastfeed while using this medication involves weighing the benefits of breastfeeding against the potential risks to the infant and the necessity of the drug for the mother's health.

Dosage Forms

Trokendi XR is available in the following form:

• Extended-release capsules: These are oral capsules designed to release the medication slowly. They must be swallowed whole and should not be crushed, chewed, or opened.

FDA Approval and Indications

Trokendi XR is approved by the U.S. Food and Drug Administration (FDA) as a once-daily extended-release capsule. It is indicated for the following uses:

• Epilepsy: It is used as monotherapy or adjunctive therapy for partial-onset seizures or primary generalized tonic-clonic seizures in patients 6 years of age and older. It is also approved as adjunctive therapy for seizures associated with Lennox-Gastaut syndrome in patients 6 years and older.
• Migraine Prevention: It is indicated for the preventive treatment of migraine headaches in patients 12 years of age and older.

Regulatory Safety Monitoring

The FDA monitors the safety profile of Trokendi XR through the FDA Adverse Event Reporting System (FAERS). This program identifies potential signals of serious risks or new safety information that may lead to labeling changes or further regulatory action.

Major Safety Warnings

Although Trokendi XR does not have a boxed warning, the FDA-approved labeling includes several significant warnings regarding its use:

• Fetal Toxicity: Use during pregnancy is associated with an increased risk of major congenital malformations, specifically cleft lip and cleft palate.
• Ocular Effects: The medication is associated with risks of acute myopia and secondary angle-closure glaucoma.
• Metabolic Acidosis: It can cause hyperchloremic, non-anion gap metabolic acidosis (decreased serum bicarbonate).
• Suicidal Behavior: Like other antiepileptic drugs, Trokendi XR carries a warning regarding an increased risk of suicidal thoughts or behavior.

Risks of Sudden Discontinuation

It is important not to stop taking Trokendi XR without consulting a healthcare professional. Abruptly ending treatment can cause seizures to return or occur more frequently. In some cases, stopping the medication suddenly can lead to status epilepticus, a serious condition where seizures do not stop.

Gradual Tapering

To safely discontinue Trokendi XR, doctors typically recommend a gradual reduction in dosage over several weeks or months. This tapering process helps the body adjust and minimizes the risk of withdrawal-related complications.

Considerations for Migraine Patients

Even if you are taking Trokendi XR for migraine prevention rather than epilepsy, stopping the medication suddenly still carries a risk of triggered seizures. Always follow a medically supervised schedule when ending treatment to ensure safety.