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- What is topiramate, and how does it work (mechanism of action)?
- What brand names are available for topiramate?
- Is topiramate available as a generic drug?
- Do I need a prescription for topiramate?
- What are the side effects of topiramate?
- What is the dosage for topiramate?
- Which drugs or supplements interact with topiramate?
- Is topiramate safe to take if I'm pregnant or breastfeeding?
- What else should I know about topiramate?
What is topiramate, and how does it work (mechanism of action)?
Topiramate is an oral drug that is used to prevent the seizures of epilepsy. It is an anti-epileptic or anti-seizure drug. It is used primarily among patients who are not controlled by other anti-epileptic drugs. About 1 in 4 Americans diagnosed with epilepsy has seizures that resist treatment with other anti-epileptic drugs. Topiramate also prevents migraine headaches.
Seizures are due to the abnormal activity ("firing") of nerves in the brain, and the abnormal activity spreads to smaller or larger portions of the brain. Although topiramate's exact mechanism of action is unknown, scientific studies suggest that it may alter neurotransmitters within the brain. Neurotransmitters are chemicals that nerves manufacture and use to communicate with other nearby nerves. By altering the production or action of the neurotransmitters, topiramate may suppress the abnormal activity of the nerves in the brain that cause the seizures or may prevent the abnormal activity from spreading to other nerves. Other studies suggest that topiramate may suppress the nerves directly (i.e., not by altering neurotransmitters) and make them less likely to fire. The FDA approved topiramate as a tablet in 1997. The sprinkle capsules were approved in October 1998.
What brand names are available for topiramate?
Topamax, Qudexy XR, Topamax Sprinkle, Topiragen, Trokendi XR
What are the side effects of topiramate?
The most common side effects of topiramate are:
- coordination problems,
- weight loss,
- speech problems,
- changes in vision or
- double vision,
- tingling or prickling sensation in hands and feet,
- difficulty with memory, and
- sensory distortion.
Other important side effects include:
Quick GuideMigraine or Headache? Migraine Symptoms, Triggers, Treatment
What is the dosage for topiramate?
- Most commonly, topiramate immediate release tablets and sprinkles are started in low doses, 25 or 50 mg per day, and then increased slowly by 25 to 50 mg per week until an effective daily dose is reached for treatment of seizures. For children 10 years or older and adults the dose may be increased by 100 mg in week 5 and 6 when topiramate is used alone. This slow approach to treatment reduces side effects. The recommended final adult dose is 200-400 mg administered as two divided doses daily.
- In children, the starting dose is up to 25 mg (1 to 3 mg/kg/day), taken nightly for the first week. The dose is then increased at 1 or 2 week intervals by 1 to 3 mg/kg/day administered in two divided doses. The target dose is 5 to 9 mg/kg per day in two divided doses.
- Migraine is treated 25 mg nightly for the first week then increased by 25 mg weekly up to a maximum dose of 100 mg administered in two divided doses.
- Patients should maintain an adequate fluid intake in order to minimize the risk of kidney stones.
- The recommended dose for extended release capsules is 200-400 mg once daily.
Which drugs or supplements interact with topiramate?
: The following medications, when taken with topiramate, increase the risk of kidney stones and metabolic acidosis: acetazolamide (Diamox), dorzolamide (Trusopt), methazolamide (Neptazane), dichlorphenamide (Daranide).
Carbamazepine (Tegretol) and phenytoin (Dilantin) markedly decrease the amount of topiramate in the body by increasing its elimination from the body. As a result, topiramate may lose effectiveness unless doses are increased.
Patients with seizure disorders taking anticonvulsant medications, including topiramate, may develop nerve toxicity from a chemical, 4'-O-methylpyridoxine, found as a contaminant in some ginkgo preparations.
Is topiramate safe to take if I'm pregnant or breastfeeding?
Topiramate is excreted in human milk at levels 10% to 20% the levels in the mother's blood.
What else should I know about topiramate?
What preparations of topiramate are available?
- Tablets: 25, 50, 100, 200 mg
- Sprinkle capsules: 15 and 25 mg
- Capsule (Extended Release): 25, 50, 100, 150, 200 mg
How should I keep topiramate stored?
- Topiramate tablets should be stored at room temperature, 15 C to 30 C (59F to 86 F).
- Sprinkle capsules should be stored at or below 25 C (77 F).
Reference: FDA Prescribing Information
Quick GuideMigraine or Headache? Migraine Symptoms, Triggers, Treatment
Topiramate (Topomax, Qudexy XR, Topamax Sprinkle, Topiragen, Trokendi XR) is a drug prescribed for the prevention of the seizures of epilepsy and prevention of migraine headaches. Side effects, drug interactions, pregnancy safety, and warnings and precautions should be reviewed prior to taking this medication.
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Top topiramate Related ArticlesComplete List
Binge Eating DisorderCharacteristics of binge eating disorder include eating more quickly than usual, eating until uncomfortably full, eating a lot of food despite not being hungry, eating alone due to embarrassment, and feeling disgusted by overeating.
Bipolar DisorderBipolar disorder (or manic depression) is a mental illness characterized by depression, mania, and severe mood swings. Treatment may incorporate mood-stabilizer medications, antidepressants, and psychotherapy.
Bipolar Disorder QuizWho is at risk for developing bipolar disorder? Are you? Take this Bipolar Disorder Quiz to learn more about bipolar disorder, if you're at risk, and what you can do about it.
Celebrities With MigrainesSee how celebrities cope with the pain caused by migraines. Learn their methods used to prevent and relieve migraine pain.
Cluster HeadachesThe term cluster headache is a type of headache that recurs over a period of time. There are episodes that last one to three times a day during a period of time, which may last from 2 weeks to 3 months. There are three main types of treatment:
- abortive medications,
- preventive medications,
- or surgery which involves blocking the trigeminal nerve.
Seizures QuizDo you know the difference between seizures and epilepsy? What are the types of seizures? Take the Epilepsy & Seizures Quiz to test your knowledge and learn about this complex disorder of the brain.
Epilepsy TreatmentEpileptic seizures mostly controlled through drug therapy, particularly anticonvulsant drugs. Types of treatment prescribed depends on several factors including the frequency and severity of the seizures as well as the person's age, overall health and medical history. Other forms of treatment options also exist including ketogenic diet and electrical stimulation.
Fragile X SyndromeFragile X syndrome is the most common inherited form of mental retardation. It's caused by a mutation on the X chromosome. People with Fragile X syndrome suffer from physical, social, emotional, speech, language, sensory, intelligence, and learning impairments. There is no definitive treatment for Fragile X, though there are ways to minimize the symptoms.
Gambling AddictionCompulsive gambling is a disorder that affects millions in the U.S. Symptoms and signs include a preoccupation with gambling, lying to family or loved ones to hide gambling, committing crimes to finance gambling, and risking importance relationships and employment due to gambling. Treatment may incorporate participation in Gamblers' Anonymous, psychotherapy, and medications like carbamazepine, topiramate, lithium, naltrexone, antidepressants, clomipramine, and fluvoxamine.
HeadacheHeadaches can be divided into two categories: primary headaches and secondary headaches. Migraine headaches, tension headaches, and cluster headaches are considered primary headaches. Secondary headaches are caused by disease. Headache symptoms vary with the headache type. Over-the-counter pain relievers provide short-term relief for most headaches.
Migraine TriggersPainful headaches can ruin your productivity and quality of life. But what triggers headaches and migraines? Learn some surprising causes of headaches and migraines plus how to find relief.
Headaches QuizIf you're plagued with headaches, our Headaches Quiz may help you identify causes, triggers, symptoms, and treatments for headache pain caused by different types of headaches such as migraines, sinus, cluster, tension, or stress.
Migraine headaches are severe headaches that are sensitive to light, sounds, and smells. Some people who suffer from migraines also have severe head pain. People also have symptoms of nausea and vomiting. Common migraine triggers may include:
- Certain foods
- Changes in barometric pressure
- Other phenomenon
They are diagnosed by a doctor if the headache pattern fits established migraine headache criteria. Over-the-counter (OTC) and prescription medications are sometime used to treat acute migraines. To prevent or reduce the frequency and severity of them doctors recommend supplements and prescription medications, for example:
- Blood pressure drugs
- Anti-seizure drugs
Lifestyle modification helps in migraine management. Many people who suffer from migraines get relief from their condition by keeping a headache diary, identifying and avoiding triggers, and taking appropriate medication.
Migraines SlideshowWhat does a migraine feel like? Discover the difference between headaches and migraines. Learn to spot migraine symptoms early, how to identify your triggers, and get more information on migraine medications and treatments.
Non-Drug Migraine HelpLearn about 14 non-drug treatments for migraines. Acupuncture, biofeedback and massage therapy are among this list of non-drug migraine treatments that may help ease pain.
SeizureEpilepsy is a brain disorder in which the person has seizures. There are two kinds of seizures, focal and generalized. There are many causes of epilepsy. Treatment of epilepsy (seizures) depends upon the cause and type of seizures experienced.
Seizures Symptoms and TypesSeizures are divided into two categories: generalized and partial. Generalized seizures are produced by electrical impulses from throughout the brain, while partial seizures are produced by electrical impulses in a small part of the brain. Seizure symptoms include unconsciousness, convulsions, and muscle rigidity.