pregabalin vs topiramate
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Side-by-side comparison of pregabalin and topiramate. 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
Specifically, there are no pharmacokinetic interactions between pregabalin and the following antiepileptic drugs: carbamazepine, valproic acid, lamotrigine, phenytoin, phenobarbital, and topiramate.
Lyrica
Topamax
Pregabalin (Lyrica) is a medicine that can help manage nerve pain, fibromyalgia, and partial-onset seizures. It works by calming overactive nerves in your body.
Topiramate is a medicine that can help prevent seizures and migraines. It works by calming the brain.
This medicine is used to treat nerve pain caused by diabetes, shingles, or spinal cord injury. It can also help with fibromyalgia, a condition that causes widespread pain. Pregabalin can also be used with other medicines to treat partial-onset seizures in adults and children as young as 1 month old.
Topiramate can be used alone or with other medicines to treat certain types of seizures in people 2 years and older. These seizures include partial-onset seizures and primary generalized tonic-clonic seizures. It also treats seizures related to Lennox-Gastaut syndrome. Topiramate can also help prevent migraine headaches in people 12 years and older.
Pregabalin works by binding to certain areas in your brain and spinal cord. This action helps to reduce the release of chemicals that send pain signals. By reducing these signals, pregabalin can help to lessen pain and control seizures.
Topiramate works by reducing the excitability of brain cells. It also increases the activity of a brain chemical called GABA. These actions help to prevent seizures and migraines.
- • Dizziness
- • Sleepiness
- • Dry mouth
- • Swelling
- • Blurred vision
- • Tingling or numbness
- • Loss of appetite
- • Weight loss
- • Speech problems
- • Tiredness
- Pain 25,902
- Fatigue 15,112
- Dizziness 14,524
- Nausea 14,053
- Headache 12,683
- Headache 6,464
- Nausea 5,710
- Fatigue 5,293
- Pain 4,485
- Migraine 4,373
Pregabalin can cause swelling of the throat, head, and neck, which can be life-threatening. Get emergency help right away if this happens. This medicine can also increase the risk of suicidal thoughts or behavior. Watch for any changes in your mood or behavior. Pregabalin may cause dizziness and sleepiness, so be careful driving or operating machinery. Do not stop taking pregabalin suddenly, as this can cause increased seizures or other side effects.
Topiramate can cause serious side effects. It can cause vision problems, including sudden nearsightedness and glaucoma. It can decrease sweating and increase body temperature, especially in children. It can cause metabolic acidosis (too much acid in the blood). It may increase the risk of suicidal thoughts or actions. It can affect thinking and coordination. It can harm an unborn baby. It can decrease bone mineral density. It can slow growth in children. It can cause serious skin reactions. It can cause kidney stones. If you experience any of these, contact your doctor immediately.
Taking pregabalin during pregnancy may slightly increase the risk of birth defects. If you are pregnant or plan to become pregnant, talk to your doctor about the risks and benefits of taking this medicine. Breastfeeding while taking pregabalin is not recommended.
Topiramate can harm your unborn baby. It may cause birth defects like cleft lip or cleft palate. It can also cause the baby to be smaller than normal. If you are pregnant or plan to become pregnant, talk to your doctor about the risks and benefits of taking topiramate.
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How to Read This pregabalin vs topiramate Comparison
pregabalin is classified in the Anticonvulsant / Nerve Pain Agent drug class, while topiramate sits within the Anticonvulsant 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, pregabalin has 82,274 submissions while topiramate has 26,325. 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 these drugs do not change how the body processes or clears the other drug from your system.. 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 pregabalin or topiramate.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.