Drug & supplement interaction

Antineoplastons + Gabapentin

Gabapentin brand names: Neurontin, Gralise.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Antineoplastons and Gabapentin in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Antineoplastons and Gabapentin

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Gabapentin and Antineoplastons in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

Worth understanding: our licensed dataset holds no drug-interaction record for Antineoplastons at all — not against Gabapentin, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Antineoplastons safety at a glance

Antineoplastons overall Use caution Not FDA-approved; effectiveness is unproven and side effects can be serious, especially at high doses.
Pregnancy Avoid There is no reliable safety data, so use during pregnancy should be avoided.
Breastfeeding Avoid Safety while breastfeeding is unknown, so it should be avoided.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Gabapentin and Antineoplastons? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

No Interaction Found — But Data Suggests Antineoplastons and Gabapentin May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do.

  • Sore throat Additional detail

    Antineoplastons

    “Adverse effects to antineoplastons have been reported in several small clinical studies. It is not clear how common these reactions are, or if they occur more frequently than with placebo. Since many patients taking antineoplastons have been diagnosed with serious illnesses, such as advanced cancers, it is not clear if these effects resulted from the illnesses themselves or were caused by antineoplastons.”

    Antineoplastons · Natural Medicines adverse-effect record, reported in hypokalemia.

    5 sources cited
    1. 20101. Burzynski SR, Mohabbat MO, Burzynski B. Human toxicology studies on oral formulation of Antineoplaston A10. Drugs Exp Clin Res 1984;10(12):891-909.
    2. 25604. Tsuda H, Hara H, Eriguchi N, et al. Toxicological study on antineoplastons A-10 and AS2-1 in cancer patients. Kurume Med J 1995;42(4):241-249. PubMed
    3. 25620. Burzynski SR, Kubove E. Toxicology studies on antineoplaston A10 injections in cancer patients. Drugs Exp Clin Res 1986;12 Suppl 1:47-55.
    4. 25621. Burzynski SR, Kubove E. Initial clinical study with antineoplaston A2 injections in cancer patients with five years' follow-up. Drugs Exp Clin Res 1987;13 Suppl 1:1-11.
    5. 25603. Burzynski SR, Lewy RI, Weaver RA, et al. Phase II study of antineoplaston A10 and AS2-1 in patients with recurrent diffuse intrinsic brain stem glioma: a preliminary report. Drugs R D 2003;4(2):91-101. PubMed

    Gabapentin

    Listed in the ADVERSE REACTIONS section of the FDA label for Gabapentin. Read the label on DailyMed ›

  • Drowsiness / Dizziness / Headache reported in 5.0% of FDA reports for Gabapentin Additional detail

    Antineoplastons

    “Orally and intravenously, headache, fatigue, sleepiness, ringing in the ears, and numbness have been reported for patients treated with antineoplastons A10 and AS2-1. Dizziness has also been noted for some patients treated with oral antineoplaston A10 or intravenous antineoplaston A3.”

    Antineoplastons · Natural Medicines adverse-effect record, reported in cluster headache.

    6 sources cited
    1. 25593. Buckner JC, Malkin MG, Reed E, et al. Phase II study of antineoplastons A10 (NSC 648539) and AS2-1 (NSC 620261) in patients with recurrent glioma. Mayo Clin Proc 1999;74(2):137-145. PubMed
    2. 25601. Burzynski SR, Conde AB, Peters A, et al. A retrospective study of antineoplastons A10 and AS2-1 in primary brain tumors. Clin Drug Invest 1999;18(1):1-10.
    3. 25603. Burzynski SR, Lewy RI, Weaver RA, et al. Phase II study of antineoplaston A10 and AS2-1 in patients with recurrent diffuse intrinsic brain stem glioma: a preliminary report. Drugs R D 2003;4(2):91-101. PubMed
    4. 25610. Burzynski SR, Weaver RA, Lewy RI, et al. Phase II study of antineoplaston A10 and AS2-1 in children with recurrent and progressive multicentric glioma : a preliminary report. Drugs R D 2004;5(6):315-326. PubMed
    5. 25620. Burzynski SR, Kubove E. Toxicology studies on antineoplaston A10 injections in cancer patients. Drugs Exp Clin Res 1986;12 Suppl 1:47-55.
    6. 20101. Burzynski SR, Mohabbat MO, Burzynski B. Human toxicology studies on oral formulation of Antineoplaston A10. Drugs Exp Clin Res 1984;10(12):891-909.

    Gabapentin

    Listed in the ADVERSE REACTIONS section of the FDA label for Gabapentin, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

  • Stomach upset / Nausea / Vomiting reported in 6.3% of FDA reports for Gabapentin Additional detail

    Antineoplastons

    “Orally, nausea, vomiting, upset stomach, abdominal pain, and excessive flatulence has been reported for patients with neoplastic disease treated with antineoplaston A10 100-149 mg/kg/day for up to 149 days.”

    Antineoplastons · Natural Medicines adverse-effect record, reported in flatulence.

    2 sources cited
    1. 20101. Burzynski SR, Mohabbat MO, Burzynski B. Human toxicology studies on oral formulation of Antineoplaston A10. Drugs Exp Clin Res 1984;10(12):891-909.
    2. 25620. Burzynski SR, Kubove E. Toxicology studies on antineoplaston A10 injections in cancer patients. Drugs Exp Clin Res 1986;12 Suppl 1:47-55.

    Gabapentin

    Listed in the ADVERSE REACTIONS section of the FDA label for Gabapentin, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

  • Fever Additional detail

    Antineoplastons

    “Intravenously, fever has been reported in patients receiving 6 months of treatment with A10 (11.3 grams/kg daily) and AS2-1 (0.4 grams/kg daily).”

    Antineoplastons · Natural Medicines adverse-effect record, reported in fever.

    2 sources cited
    1. 25603. Burzynski SR, Lewy RI, Weaver RA, et al. Phase II study of antineoplaston A10 and AS2-1 in patients with recurrent diffuse intrinsic brain stem glioma: a preliminary report. Drugs R D 2003;4(2):91-101. PubMed
    2. 25619. Burzynski SR, Burzynski B, Mohabbat MO. Toxicology studies on antineoplaston AS2-1 injections in cancer patients. Drugs Exp Clin Res 1986;12 Suppl 1:25-35.

    Gabapentin

    Listed in the ADVERSE REACTIONS section of the FDA label for Gabapentin. Read the label on DailyMed ›

  • Tiredness reported in 6.9% of FDA reports for Gabapentin Additional detail

    Antineoplastons

    “Orally and intravenously, antineoplastons AS2-1 and A10 have been associated with peripheral edema. Swelling of joints, muscle and joint pain, muscle contractions in the throat, weakness, and fatigue have been reported for patients treated with antineoplastons A2, AS2-1, AS2-5, and/or A10.”

    Antineoplastons · Natural Medicines adverse-effect record, reported in fatigue.

    5 sources cited
    1. 25604. Tsuda H, Hara H, Eriguchi N, et al. Toxicological study on antineoplastons A-10 and AS2-1 in cancer patients. Kurume Med J 1995;42(4):241-249. PubMed
    2. 25624. Burzynski SR. Toxicology studies on antineoplaston AS2-5 injections in cancer patients. Drugs Exp Clin Res 1986;12 Suppl 1:17-24.
    3. 25603. Burzynski SR, Lewy RI, Weaver RA, et al. Phase II study of antineoplaston A10 and AS2-1 in patients with recurrent diffuse intrinsic brain stem glioma: a preliminary report. Drugs R D 2003;4(2):91-101. PubMed
    4. 25620. Burzynski SR, Kubove E. Toxicology studies on antineoplaston A10 injections in cancer patients. Drugs Exp Clin Res 1986;12 Suppl 1:47-55.
    5. 25621. Burzynski SR, Kubove E. Initial clinical study with antineoplaston A2 injections in cancer patients with five years' follow-up. Drugs Exp Clin Res 1987;13 Suppl 1:1-11.

    Gabapentin

    Listed in the ADVERSE REACTIONS section of the FDA label for Gabapentin, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

  • Swelling Additional detail

    Antineoplastons

    Recorded for Antineoplastons in the same Natural Medicines adverse-effect record shown under Tiredness above.

    Gabapentin

    Listed in the ADVERSE REACTIONS section of the FDA label for Gabapentin. Read the label on DailyMed ›

Reported for Antineoplastons but not commonly for Gabapentin: an irregular heartbeat, ringing in the ears, stomach pain and chest pain.

Effects for Gabapentin come from the ADVERSE REACTIONS section of its FDA label; effects for Antineoplastons come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 361,481 voluntary FDA FAERS reports for Gabapentin that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

From our Q&A

Questions About Antineoplastons or Gabapentin

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Antineoplastons or Gabapentin, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Gabapentin

This page covers Antineoplastons only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Gabapentin page lists 106 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: 1,4-butanediol (major), Activated Charcoal (major), Beer (major), Gamma-hydroxybutyrate (ghb) (major) and Kava (major).

By severity: 7 major · 82 moderate · 17 minor.

From our pharmacist’s overview on the Gabapentin page

“Gabapentin (Neurontin, Gralise) calms overactive nerves, which means it already slows your nervous system down, and that is exactly what 78 of the 106 supplements on this list also do. So the dominant risk here is sedation stacked on sedation, extra drowsiness at best and dangerously slowed breathing at worst, and with seven entries ra…”

Reviewed by 2 · Jul 18, 2026

Open the Gabapentin interaction page

How much people look this up

Where Antineoplastons and Gabapentin Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Antineoplastons
Steady interest

#1,353 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Gabapentin
Top 5%

#41 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Antineoplastons reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Antineoplastons and Gabapentin records this page draws on were last updated July 10, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Antineoplastons

What is Antineoplastons?

  • Cancer (various types, including brain tumors)
  • Adjunct cancer support
  • Investigational anticancer therapy

Antineoplastons are synthetic peptide and amino acid compounds promoted as an alternative cancer treatment, but they are not approved by the FDA and high-quality clinical evidence supporting their effectiveness is lacking. Most studies have been conducted by their developer and have not been independently confirmed. If you are considering them, talk with your oncologist first, and never replace proven cancer treatment with an unproven one.

Synthetic peptides, amino acid derivatives, and organic acids (originally isolated from human blood and urine) · Oral capsules and intravenous (IV) infusions, used mainly within specific clinics or research settings

An interaction check asks whether these two react with each other — it does not ask whether Antineoplastons is a good idea for someone in your situation. Here is what our Antineoplastons record says about it on its own.

Antineoplastons: dosing

There is no established, standardized safe dose of antineoplastons for any condition, and they are not available as a regular over-the-counter supplement. The doses studied have varied widely and were given under medical supervision, often as intravenous infusions.Because these products are unproven and can cause serious side effects, you should not try to dose them on your own. If you are considering antineoplastons, discuss it thoroughly with your oncologist and pharmacist first.

From our Antineoplastons monograph — the full record covers uses, side effects and every documented interaction.

Read the full Antineoplastons monograph & all interactions
Medication

About Gabapentin

What Is Gabapentin Used For?

Brand names: Neurontin, Gralise

Gabapentin (brands include Neurontin, Relgaabi, Gabarone, Gralise, and Horizant) is primarily used to manage postherpetic neuralgia (PHN) — the nerve pain that lingers after a shingles outbreak — in adults. Neurontin, Relgaabi, Gabarone, and gabapentin capsules, tablets, and oral solution are also used as add-on therapy for partial onset seizures (a type of epilepsy) in adults and children aged 3 and older.

Horizant (gabapentin enacarbil extended-release tablet) has two specific approvals: treatment of moderate-to-severe primary restless legs syndrome (RLS) in adults, and management of postherpetic neuralgia in adults. Horizant is not recommended for people who need to sleep during the day and stay awake at night. Gralise is approved only for postherpetic neuralgia and cannot be substituted for other gabapentin products due to its different release profile.

Most-Reported Side Effects for Gabapentin

From FAERS, the FDA’s public side-effect reporting system (361,481 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fatigue 24,972 reports
Nausea 22,728 reports
Diarrhea 18,114 reports
Headache 17,897 reports
Dizziness 16,238 reports
See full Gabapentin drug information
Keep checking

Other Drugs & Antineoplastons

Browse every other medication we’ve checked against Antineoplastons — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

We also checked Antineoplastons against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Antineoplastons list.

See the full Antineoplastons interactions page
See every supplement checked against Gabapentin, ranked by severity
Evidence & sources

Antineoplastons References

The 20 references that drive our Antineoplastons monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Burzynski SR, Stolzmann Z, Szopa B, Stolzmann E, Kaltenberg OP. Antineoplaston A in cancer therapy. (I). Physiol Chem Phys 1977;9(6):485-500.
  2. Burzynski SR, Mohabbat MO, Burzynski B. Human toxicology studies on oral formulation of Antineoplaston A10. Drugs Exp Clin Res 1984;10(12):891-909.
  3. Burzynski SR, Kubove E, Burzynski B. Treatment of hormonally refractory cancer of the prostate with antineoplaston AS2-1. Drugs Exp Clin Res 1990;16(7):361-369.
  4. Buckner JC, Malkin MG, Reed E, et al. Phase II study of antineoplastons A10 (NSC 648539) and AS2-1 (NSC 620261) in patients with recurrent glioma. Mayo Clin Proc 1999;74(2):137-145. PubMed
  5. Burzynski SR, Conde AB, Peters A, et al. A retrospective study of antineoplastons A10 and AS2-1 in primary brain tumors. Clin Drug Invest 1999;18(1):1-10.
  6. Burzynski SR, Lewy RI, Weaver RA, et al. Phase II study of antineoplaston A10 and AS2-1 in patients with recurrent diffuse intrinsic brain stem glioma: a preliminary report. Drugs R D 2003;4(2):91-101. PubMed
  7. Tsuda H, Hara H, Eriguchi N, et al. Toxicological study on antineoplastons A-10 and AS2-1 in cancer patients. Kurume Med J 1995;42(4):241-249. PubMed
  8. Burzynski SR, Kubove E. Phase I clinical studies of antineoplaston A3 injections. Drugs Exp Clin Res 1987;13 Suppl 1:17-29.
  9. Burzynski SR, Kubove E, Burzynski B. Phase I clinical studies of antineoplaston A5 injections. Drugs Exp Clin Res 1987;13 Suppl 1:37-43.
  10. Burzynski SR, Weaver RA, Lewy RI, et al. Phase II study of antineoplaston A10 and AS2-1 in children with recurrent and progressive multicentric glioma : a preliminary report. Drugs R D 2004;5(6):315-326. PubMed
  11. Burzynski SR, Weaver RA, Janicki T, et al. Long-term survival of high-risk pediatric patients with primitive neuroectodermal tumors treated with antineoplastons A10 and AS2-1. Integr Cancer Ther 2005;4(2):168-177. PubMed
  12. Burzynski SR, Burzynski B, Mohabbat MO. Toxicology studies on antineoplaston AS2-1 injections in cancer patients. Drugs Exp Clin Res 1986;12 Suppl 1:25-35.
  13. Burzynski SR, Kubove E. Toxicology studies on antineoplaston A10 injections in cancer patients. Drugs Exp Clin Res 1986;12 Suppl 1:47-55.
  14. Burzynski SR, Kubove E. Initial clinical study with antineoplaston A2 injections in cancer patients with five years' follow-up. Drugs Exp Clin Res 1987;13 Suppl 1:1-11.
  15. Burzynski SR, Kubove E, Burzynski B. Phase I clinical studies of antineoplaston A5 injections. Drugs Exp Clin Res 1987;13 Suppl 1:37-43.

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Antineoplastons and Gabapentin Together: Common Questions

Is it safe to take Antineoplastons with Gabapentin?
We do not list a known interaction between Antineoplastons and Gabapentin. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Do Antineoplastons and Gabapentin have any of the same side effects?
Yes — our sources link each of them separately to 10 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
Does Gabapentin interact with any supplements?
Yes. Gabapentin has documented interactions with 106 supplements in our database — Antineoplastons is not one of them. The Gabapentin interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Antineoplastons monograph Uses, safety profile, and every drug interaction in one place Gabapentin drug information The full plain-English guide to this medication Gabapentin supplement interactions Every supplement checked against Gabapentin, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 20 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Gabapentin and Antineoplastons?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.