Compare Neurontin vs. Topamax

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Neurontin
(gabapentin)

Qudexy Xr
(topiramate)

Treats tingling and burning nerve pain. Neurontin (Gabapentin) is an old seizure disorder medicine that's now used to treat nerve-related pain caused by different conditions.Prevents seizures and migraine headaches. Qudexy Xr (Topiramate) is useful for preventing seizures and migraines, and doesn't require blood tests while you're on it.
Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected
4.56Neurontin
Reviews for Neurontin
57%
of people (All ages) say Neurontin is worth it
40%
say it works well
19%
say it's a big hassle
620 reviews
Have you used Neurontin (gabapentin)?
Worth itNot sureNot worth it
Reviews for Topamax
52%
+5% better vs. Neurontin
50%
-10% worse vs. Neurontin
36%
+17% better vs. Neurontin
Have you used Qudexy Xr (topiramate)?
Worth itNot sureNot worth it
Side effects
NeurontinTopamax
  • Dizziness 21%
  • Drowsiness 16%
  • Leg or ankle swelling 6%
  • Muscle weakness 1%
  • Diarrhea 2%
  • Infection 2%
  • Dry mouth 3%
  • Constipation 2%
  • Accidental injury 2%
  • Vomiting 2%
More Neurontin side effects »
  • Ear, nose, or throat infection 16%
  • Diarrhea 8%
  • Weight decrease 7%
  • Difficulty with concentration/attention 7%
  • Inflammation inside the nose 5%
  • Tingling sensation 3%
  • Infection 3%
  • Infection viral 3%
  • Rash 3%
  • Fatigue 17%
More Topamax side effects »
How it works
NeurontinTopamax
Neurontin (Gabapentin) is an antiepileptic and nerve pain reliever. Researchers don't know exactly how it works, but it has a similar structure to GABA, a neurotransmitter that calms nerves in the brain and spinal cord.Qudexy Xr (Topiramate) is an antiepileptic. Researchers don't know exactly how it works, but it seems to affect multiple parts of the brain to control seizures and migraines.
Type of medication
NeurontinTopamax
Prescription onlyPrescription only
Available as
NeurontinTopamax
  • Pill
  • Oral solution
  • Pill
  • Extended release capsule
Used for
NeurontinTopamax
Risk factors for serious side effects
NeurontinTopamax
  • Children ages 3 to 12
  • Taking with alcohol or drugs
  • Stopping Neurontin (Gabapentin) suddenly
Detailed Neurontin (gabapentin) risks & warnings »
  • History of depression
  • Children
  • History of metabolic disorders
  • People also taking Depakote
  • Low-carb diet
Detailed Qudexy Xr (topiramate) risks & warnings »
Pregnancy

Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

Research studies with real people found harmful effects on unborn babies, but the benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

Food
NeurontinTopamax
  • Take the extended-release tablet with food.
No food related info.
Kidneys and liver
NeurontinTopamax
No kidneys and liver related info.
  • Qudexy Xr (Topiramate) may increase your risk for kidney stones. Stay well-hydrated to lower your risk.
  • A few people will get kidney stones.
Pain
NeurontinTopamax
  • Studies show it's most effective for nerve pain from diabetes, shingles, and fibromyalgia (a painful muscle condition).
No pain related info.
Sleep
NeurontinTopamax
  • Neurontin (Gabapentin) is likely to cause some side effects, including memory problems, drowsiness, dizziness, or confusion.
No sleep related info.
Weight
NeurontinTopamax
No weight related info.
  • Can cause sleepiness, speech problems, tingling sensations, and weight loss.
Upsides and benefits
NeurontinTopamax
  • Originally used to treat epilepsy (partial seizures), but now it primarily treats neuropathic pain that's caused by nerve stimulation or damage.
  • Studies show it's most effective for nerve pain from diabetes, shingles, and fibromyalgia (a painful muscle condition).
  • It's available as a generic, so it's less expensive than similar medications.
  • Used on its own or with other antiepileptic medicines to lower the frequency of seizures, especially for people with tonic-clonic or partial seizures, or Lennox-Gestaut syndrome.
  • Helpful in preventing frequent migraine headaches.
  • Doesn't need routine blood tests.
Downsides and risks
NeurontinTopamax
  • Neurontin (Gabapentin) is likely to cause some side effects, including memory problems, drowsiness, dizziness, or confusion.
  • You can't skip or miss doses since suddenly stopping Neurontin (Gabapentin) can cause seizures. This is even more likely if you drink alcohol, so it might not be the best medication for heavy drinkers.
  • Can cause sleepiness, speech problems, tingling sensations, and weight loss.
  • A few people will get kidney stones.
  • Not safe to use if you're pregnant.
Tips from our pharmacists for people taking the medication
NeurontinTopamax
  • Side effects are common, but usually manageable.
  • Don't drive while taking Neurontin (Gabapentin) until you know how the medication affects you.
  • Neurontin and generic forms of Gabapentin have the same ingredients as Gralise and Horizant, but are dosed differently. Make sure you know which form you're taking since they are used for different purposes.
  • Take the extended-release tablet with food.
  • Stop taking Neurontin (Gabapentin) slowly over at least one week to avoid getting withdrawal symptoms.
  • For the first week, avoid activities that require you to be alert.
  • Don't use if pregnant.
  • Can cause tingling skin sensations and reduced appetite.
  • Report any confusion, decreased sweating, fever, or changes in behavior or vision.
  • Takes 3 to 4 weeks to feel full effects on mood.
Learn more
More about NeurontinSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Neurontin (gabapentin)?
Worth itNot sureNot worth it
More about TopamaxSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Qudexy Xr (topiramate)?
Worth itNot sureNot worth it