topiramate

How long does Topiramate stay in your body?

The elimination half-life of topiramate is about 21 hours — the time it takes the body to clear about half of it. As a rule of thumb, a medicine is mostly gone after roughly 4 to 5 half-lives, though this varies from person to person with age and kidney or liver function. Linear, dose-proportional kinetics — no active metabolite outlasts the parent (topiramate is largely excreted unchanged in urine, ~70%) and it is not a prodrug. Steady-state is reached in about 4 days with normal renal function. The half-life is prolonged in kidney impairment: plasma clearance falls ~42% in moderate renal impairment (and dose is halved for creatinine clearance <70 mL/min), so the drug clears more slowly. It is modestly longer in older adults (half-life ~13% longer, clearance ~20% lower), and clearance drops ~26% in moderate-to-severe hepatic impairment.

This is general information, not medical advice. It doesn’t tell you when a drug test would read negative (tests detect substances for different, often longer, windows) or when it’s safe to take another dose — ask your pharmacist or prescriber. Source: Topiramate tablets — FDA label (DailyMed), Clinical Pharmacology 12.3.

Frequently asked questions

What does Topiramate treat?

Topiramate (Topiramate) may be used to treat bipolar disorder, partial epilepsies, tonic-clonic epilepsy, pain, infantile spasms, lennox gastaut syndrome, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.

How much does Topiramate cost?

Nobody can tell you what you will pay — your price is set by your insurer's formulary, your deductible and the pharmacy's markup, and none of those are published. What IS published is what the pharmacy paid to acquire it: about $3.20 for 30, per the CMS NADAC survey. Treat that as the floor, not the quote — ask the pharmacist for the cash price as well as your copay, because for cheap generics the cash price often wins.

Is there a coupon or discount for Topiramate?

pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Topiramate. To pay less, Topiramate is already a generic — usually the lowest-cost version — so the main levers are comparing cash prices between pharmacies and using a pharmacy discount-card service. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.

Who makes Topiramate?

Topiramate is marketed by Chartwell Rx. You can see Chartwell Rx's full profile, rating, and other products on pharmaranks.

Is Topiramate a brand-name or generic drug?

Topiramate is a generic medication; its active ingredient is Topiramate. Generics contain the same active ingredient as the brand-name original and are usually lower cost.

Is Topiramate available over the counter?

No. Topiramate is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.

What forms does Topiramate come in?

Topiramate is currently marketed as capsule, capsule, extended release, solution and tablet, per the FDA's National Drug Code Directory.

Is Topiramate FDA-registered?

Topiramate is on record with the U.S. FDA under application number ANDA079206. You can verify this on its official FDA label.