Topiramate and dosage: An overview

Approved uses

Topiramate is approved by the Food and Drug Administration (FDA) to help prevent migraine headaches and help manage epileptic seizures in certain people. Specifically, it’s used to:

• Treat partial-onset or primary generalized tonic-clonic seizures in people ages 2 years and older. Topiramate can be used alone (as monotherapy) for these conditions.
• Treat partial-onset seizures, primary generalized tonic-clonic seizures, or seizures associated with Lennox-Gastaut syndrome (LGS) in people ages 2 years and older. Topiramate can be combined with other medications (as adjunctive therapy) for these conditions.
• Prevent migraine headaches in people ages 12 years and older.

Off-label uses

While not FDA-approved for these conditions, topiramate is sometimes prescribed off-label by healthcare professionals for conditions such as alcohol dependence, binge eating disorder, essential tremor, weight loss, and certain psychiatric disorders like bipolar disorder or PTSD-related nightmares. (With off-label use, a drug is prescribed for a condition it hasn’t been approved to treat.)

Note: Because off-label uses aren’t FDA approved, there is no dosage information given for them in the drug’s prescribing information. If your doctor prescribes topiramate off-label, they will determine your particular dosage.

Dosage and titration

Dosage of topiramate is highly personalized. It’s based on the condition being treated, as well as the person’s age and — in certain children — body weight. Dosage is given in milligrams (mg) in adults and in milligrams per kilogram of body weight (mg/kg) in certain children.

Dosage for epilepsy (monotherapy)

• Adults and children ages 10 years and older:
  • The recommended target dosage is 400 mg/day, administered in two divided doses.
  • Titration usually begins at 50 mg daily (25 mg morning and evening) for the first week, increasing by 50 mg/day each week until the target dose is reached over the course of 6 weeks.
• Children ages 2 to 9 years: Dosing is based on body weight. It starts at 25 mg nightly for the first week, with weekly increases of 25 to 50 mg. Target daily doses typically range from 150 mg to 400 mg depending on the child’s weight.

Dosage for epilepsy (adjunctive therapy)

• People ages 17 years and older:
  • For partial-onset seizures or LGS, the target dose is 200 to 400 mg/day.
  • For primary generalized tonic-clonic seizures, the target dose is 400 mg/day.
  • Titration typically starts at 25 to 50 mg nightly, increasing by 25 to 50 mg weekly.
• Children ages 2 through 16 years: The recommended total daily dose is approximately 5 to 9 mg/kg per day, administered in two divided doses.

Dosage for migraine prevention

• People ages 12 years and older: The recommended total daily dose is 100 mg in two divided doses.
• The typical 4-week titration (dosage increase) is as follows:
  • week 1: 25 mg nightly
  • week 2: 25 mg in the morning and 25 mg in the evening (50 mg total)
  • week 3: 25 mg in the morning and 50 mg in the evening (75 mg total)
  • week 4: 50 mg in the morning and 50 mg in the evening (100 mg total)

Administration and use

The following is important information about taking topiramate.

• Method: Due to their bitter taste, tablets should be swallowed whole. They should not be broken or crushed. If you have difficulty swallowing tablets, ask your doctor or pharmacist for suggestions, or check out these tips for swallowing pills.
• Food: Topiramate can be taken with or without food.
• Discontinuation: This medication should never be stopped abruptly. Doing so can increase the risk of rebound seizures. Your doctor will likely taper your dose gradually over several weeks if you need to stop taking this medication.