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Gabapentin

Medication anticonvulsant / neuropathic agent otherpain & fever
Aka: Neurontin
Brands seen in Singapore: Neurontin, Neuran, Alpentin, Gabapin
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Prescribed for nerve pain and for seizures
When to take
With or without food · NHS: doses spaced through the day
Take with
Water or juice · NHS: capsules swallowed whole
Pros & cons
Pros
  • HealthHub: used for nerve pain and for seizures
  • HealthHub: may be taken with or without food
  • SG register: 100, 300 and 400 mg capsules
Cons
  • HealthHub: drowsiness, dizziness, swelling, fatigue
  • FDA: opioids — respiratory depression, deaths reported
  • NHS: stopping suddenly can bring withdrawal or fits
Sources
  1. HSA — Listing of Registered Therapeutic Products (data.gov.sg open dataset, 5,511 rows, filtered locally for gabapentin) · read 2026-08-27
    what it says
    “All 12 registered gabapentin products carry Forensicclassification 'Prescription Only', in 100, 300 and 400 mg capsules — SIN08303P NEURONTIN CAPSULE 300 mg; SIN15230P NEURAN CAPSULE 300MG; SIN16698P ALPENTIN CAPSULE 100MG; SIN16294P GABAPIN 100”
  2. HealthHub (Pharmaceutical Society of Singapore) — Gabapentin: what is this medication for · read 2026-08-27
    what it says
    “Gabapentin is used for treatment of neuropathic (nerve) pain ... Gabapentin may also be used in the treatment of seizures (fits).”
  3. HealthHub — Gabapentin: how should I take or use this medication · read 2026-08-27
    what it says
    “Gabapentin may be taken with or without food. For gabapentin capsules, swallow whole, do not crush or chew it. Do not stop taking your medication without checking with your healthcare professional.”
  4. HealthHub — Gabapentin: common side effects · read 2026-08-27
    what it says
    “Common side effects of gabapentin include: Nausea ... Drowsiness ... Dizziness ... Swelling of hands or legs; Fatigue (Feeling of tiredness); Muscle weakness”
  5. HealthHub — Gabapentin: rare but serious side effects · read 2026-08-27
    what it says
    “Other serious side effects include: Blurring of your vision or loss of vision; Worsening agitation, restlessness or violent behaviour”
  6. HealthHub — Gabapentin: what precautions should I take · read 2026-08-27
    what it says
    “You have a history of: Kidney condition; Myasthenia Gravis (an immune disease that causes muscle weakness); Mental health conditions; You are pregnant, planning to become pregnant, or breastfeeding”
  7. HealthHub — Gabapentin: what food or medication should I avoid · read 2026-08-27
    what it says
    “Avoid drinking alcohol while taking gabapentin as it can cause excessive drowsiness. Take antacids at least two hours apart from gabapentin, as they may reduce the amount of medication being taken up by your body.”
  8. NHS Medicines A-Z — Gabapentin: how and when to take it · read 2026-08-27
    what it says
    “Gabapentin is a prescription medicine ... Swallow gabapentin capsules and tablets whole with a drink of water or juice. Do not chew them ... Try to space your doses evenly through the day.”
  9. NHS Medicines A-Z — Gabapentin: dosage for nerve pain · read 2026-08-27
    what it says
    “The usual dose to treat nerve pain in adults is 900mg to 3,600mg a day, split into 3 doses.”
  10. NHS Medicines A-Z — Gabapentin: stopping gabapentin · read 2026-08-27
    what it says
    “Stopping gabapentin suddenly can cause seizures that will not stop ... you may have severe withdrawal symptoms, including: anxiety; difficulty sleeping; feeling sick; pain; sweating”
  11. US FDA label for NEURONTIN (gabapentin), section 2 Dosage and Administration, via openFDA drug/label.json (effective 2026-05-12) · read 2026-08-27
    what it says
    “The dose can subsequently be titrated up as needed for pain relief to a dose of 1800 mg/day ... Dosages up to 2400 mg/day have been administered in long-term clinical studies. Doses of 3600 mg/day have also been administered”
  12. NHS Medicines A-Z — Gabapentin: cautions with other medicines · read 2026-08-27
    what it says
    “strong painkillers, such as morphine – these can make you very tired and dizzy when you start taking gabapentin ... antidepressants, such as amitriptyline or fluoxetine ... antipsychotic medicines for mental health problems ...”
  13. NHS Medicines A-Z — Gabapentin: mixing gabapentin with herbal remedies or supplements · read 2026-08-27
    what it says
    “Taking herbal remedies and supplements that can make you feel dizzy or drowsy while you're taking gabapentin could make these side effects worse.”
  14. US FDA label for NEURONTIN (gabapentin), section 7.1 Opioids, via openFDA drug/label.json (effective 2026-05-12) · read 2026-08-27
    what it says
    “Respiratory depression and sedation, sometimes resulting in death, have been reported following coadministration of gabapentin with opioids (e.g., morphine, hydrocodone, oxycodone, buprenorphine)”
  15. US FDA label for NEURONTIN (gabapentin), section 5.8 Respiratory Depression, via openFDA drug/label.json (effective 2026-05-12) · read 2026-08-27
    what it says
    “There is evidence from case reports, human studies, and animal studies associating gabapentin with serious, life-threatening, or fatal respiratory depression when coadministered with CNS depressants, including opioids, or in the setting of underlying respiratory impairment.”
  16. US FDA label for NEURONTIN (gabapentin), section 9.2 Abuse, via openFDA drug/label.json (effective 2026-05-12) · read 2026-08-27
    what it says
    “Gabapentin misuse and abuse have been reported in the postmarketing setting and published literature. Most of the individuals described in these reports had a history of polysubstance abuse.”
  17. US FDA label for NEURONTIN (gabapentin), section 9.3 Dependence, via openFDA drug/label.json (effective 2026-05-12) · read 2026-08-27
    what it says
    “After discontinuation of short-term and long-term treatment with gabapentin, withdrawal symptoms have been observed in some patients. Withdrawal symptoms may occur shortly after discontinuation, usually within 48 hours.”
  18. US FDA label for NEURONTIN (gabapentin), section 9.1 Controlled Substance, via openFDA drug/label.json (effective 2026-05-12) — cited in verify_notes only, US federal scheduling, not SG · read 2026-08-27
    what it says
    “NEURONTIN contains gabapentin, which is not a controlled substance.”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.