Last reviewed 2026-04-23 · How we verify

topiramate, propranolol

Topiramate is an anticonvulsant that blocks voltage-dependent sodium channels and enhances the activity of GABA at the GABA_A receptor.

Topiramate is an anticonvulsant that blocks voltage-dependent sodium channels and enhances the activity of GABA at the GABA_A receptor. Used for Seizure prevention in patients with epilepsy, Migraine prevention.

At a glance

Mechanism of action

Topiramate's mechanism of action is complex and multifaceted, involving the blockade of voltage-dependent sodium channels, which reduces the frequency of action potentials in neurons. Additionally, topiramate enhances the activity of GABA at the GABA_A receptor, which is the primary inhibitory neurotransmitter in the brain. This dual mechanism of action contributes to its anticonvulsant and neuroprotective effects.

Approved indications

• Seizure prevention in patients with epilepsy
• Migraine prevention

Common side effects

• Dizziness
• Headache
• Fatigue
• Nausea
• Drowsiness

Key clinical trials

• Comparative Effectiveness of Migraine Preventive Medications: The APT Comparison Study (PHASE4)
• ACT Therapy for HF Migraine (NA)
• Chinese Real-world Study of Treatment of Vestibular Migraine
• Quality Improvement and Practice Based Research in Neurology Using the EMR (PHASE4)
• Study of Human Non-Shivering Thermogenesis and Basal Metabolic Rate (PHASE2)
• Comparison of the Effectiveness of First-line Preventive Treatment of Migraine in Primary Care (PHASE4)
• Cognitive Side Effects of Commonly Prescribed Medications in Pediatric Migraine (NA)
• An Efficacy and Tolerability Study of Topiramate in Participants With Migraine (PHASE4)

Primary sources

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