tiagabine vs valproate
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Side-by-side comparison of tiagabine and valproate. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Carbamazepine, phenytoin, primidone, and phenobarbital are generally classified as enzyme inducers; valproate and gabapentin are not. Valproate: Tiagabine causes a slight decrease (about 10%) in steady-state valproate concentrations. Valproate: The addition of tiagabine to patients taking valproate chronically had no effect on tiagabine pharmacokinetics, but valproate significantly decreased tiagabine binding in vitro from 96.3 to 94.8%, which resulted in an increase of approximately 40% in the free tiagabine concentration.
Tiagabine is a medicine used with other medicines to treat partial seizures. It helps to control seizures by affecting certain chemicals in the brain.
Valproate sodium injection is used when you cannot take valproate pills. It helps control seizures.
Tiagabine is used to treat partial seizures in adults and children 12 years and older. It is used along with other seizure medicines. Partial seizures affect only one part of the brain.
This medicine treats certain types of seizures. It can be used alone or with other medicines to treat complex partial seizures. It also treats simple and complex absence seizures, and multiple seizure types that include absence seizures.
Tiagabine works by increasing the amount of a chemical called GABA in the brain. GABA helps to calm the brain and reduce seizures. Tiagabine blocks the reuptake of GABA, which means more GABA is available in the brain.
Valproate affects the levels of certain chemicals in your brain. These chemicals help to control seizures. This medicine helps to reduce the frequency of seizures.
- • Dizziness
- • Lack of energy
- • Sleepiness
- • Nausea
- • Nervousness or irritability
- • Headache
- • Dizziness
- • Nausea
- • Pain at the injection site
- Encephalopathy 16
- Myoclonus 14
- Dizziness 6
- Feeling Abnormal 5
- Seizure 5
- Drug Interaction 1,185
- Foetal Exposure During Pregnancy 1,043
- Somnolence 950
- Epilepsy 813
- Toxicity To Various Agents 757
This medicine may cause serious side effects. Tell your doctor right away if you have any changes in mood or behavior, or any suicidal thoughts.
Valproate can cause life-threatening liver problems, especially in the first 6 months of treatment. Children under 2 and people with mitochondrial disorders have a higher risk. Valproate can also harm an unborn baby, causing birth defects and lower IQ. It can also cause pancreatitis, which can be fatal.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if tiagabine will harm your unborn baby. Talk to your doctor about the risks and benefits of taking tiagabine during pregnancy.
Valproate can cause serious birth defects if taken during pregnancy. Do not take this medicine if you are pregnant or plan to become pregnant unless other medicines don't work for you. There is a pregnancy registry for women who take valproate during pregnancy; call 1-888-233-2334 to enroll.
How to Read This tiagabine vs valproate Comparison
tiagabine is classified in the Anticonvulsant (GABA Reuptake Inhibitor) drug class, while valproate sits within the Anticonvulsant / Mood Stabilizer class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, tiagabine has 46 submissions while valproate has 4,748. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to valproate pushes tiagabine off blood proteins, which increases the amount of active tiagabine in the body. tiagabine also slightly lowers the levels of valproate.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for tiagabine or valproate.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.