Drug & supplement interaction

American Pawpaw + Nimodipine

Nimodipine brand names: Nimotop, Nymalize.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 27, 2026
The bottom line No known interaction

We found no known interaction between American Pawpaw and Nimodipine 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

American Pawpaw and Nimodipine

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 Nimodipine and American Pawpaw 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.

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.

American Pawpaw safety at a glance

American Pawpaw overall Use caution The ripe fruit is generally eaten as food, but concentrated leaf, twig, and seed extracts may be toxic and lack good safety data.
Pregnancy Avoid There is not enough safety information, and concentrated extracts may be harmful, so avoid during pregnancy.
Breastfeeding Avoid Safety has not been studied, so avoid concentrated pawpaw supplements while breastfeeding.

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

Still wondering about combining Nimodipine and American Pawpaw? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Nimodipine

Interactions in our licensed database are recorded against drug classes, not just single drug names. Nimodipine is filed under 3 classifications — antihypertensive drugs, cytochrome p450 3a4 (cyp3a4) substrates, oral drugs. American Pawpaw has documented interactions with 1 drug class — the most serious being antineoplastics (minor) — and none of Nimodipine’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

American Pawpaw Does Interact With Other Medications

American Pawpaw has 25 minor known drug interactions in our database — Nimodipine isn’t one of them. If you take anything else, check it against the full list below.

Minor 25 No known interaction 2,805 (incl. Nimodipine)
Taking anything else?

Check Another of Your Medications Against American Pawpaw

Covers the 2,830 medications we’ve checked against American Pawpaw. Pick one to open its full report.

What to actually watch for

No Interaction Found — But Data Suggests American Pawpaw and Nimodipine 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.

  • A skin rash Additional detail

    American Pawpaw

    “In general, American pawpaw is well tolerated. However, cases of urticaria, nausea, vomiting, bowel disturbances, headache, and faintness have been reported following ingestion of pawpaw fruit. Similarly, American pawpaw extract may cause vomiting when taken orally or contact dermatitis when applied topically.”

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

    3 sources cited
    1. 89428. Barber MA. Poisoning due to the papaw (Asimina triloba). JAMA. 1905;XLV(27):2013-2014. DOI
    2. 89429. McLaughlin JL. Paw paw and cancer: Annonaceous acetogenins from discover to commercial products. J Nat Prod. 2008;71:1311-1321.
    3. 1525. Avalos J, Rupprecht JK, McLaughlin JL, et al. Guinea pig maximization test of the bark extract from pawpaw, Asimina triloba (Annonaceae). Contact Dermatitis 1993;29:33-5.

    “Orally, American pawpaw fruit can cause urticaria.

    Topically, American pawpaw extract can cause contact dermatitis.”

    American Pawpaw · Natural Medicines adverse-effect record, reported in dermatitis.

    2 sources cited
    1. 89428. Barber MA. Poisoning due to the papaw (Asimina triloba). JAMA. 1905;XLV(27):2013-2014. DOI
    2. 1525. Avalos J, Rupprecht JK, McLaughlin JL, et al. Guinea pig maximization test of the bark extract from pawpaw, Asimina triloba (Annonaceae). Contact Dermatitis 1993;29:33-5.

    Nimodipine

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

  • Headache reported in 3.0% of FDA reports for Nimodipine Additional detail

    American Pawpaw

    “Orally, American pawpaw fruit can cause headache and faintness.”

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

    1 source cited
    1. 89428. Barber MA. Poisoning due to the papaw (Asimina triloba). JAMA. 1905;XLV(27):2013-2014. DOI

    Nimodipine

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

  • Vomiting / Nausea Additional detail

    American Pawpaw

    “Orally, American pawpaw fruit can cause nausea, vomiting, bowel disturbances, and burning of the throat and stomach. American pawpaw extract can cause vomiting when taken orally.”

    American Pawpaw · Natural Medicines adverse-effect record, reported in nausea and vomiting.

    2 sources cited
    1. 89428. Barber MA. Poisoning due to the papaw (Asimina triloba). JAMA. 1905;XLV(27):2013-2014. DOI
    2. 89429. McLaughlin JL. Paw paw and cancer: Annonaceous acetogenins from discover to commercial products. J Nat Prod. 2008;71:1311-1321.

    Nimodipine

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

Reported for American Pawpaw but not commonly for Nimodipine: hives.

Effects for Nimodipine come from the ADVERSE REACTIONS section of its FDA label; effects for American Pawpaw come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 1,102 voluntary FDA FAERS reports for Nimodipine 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.

Everything else you take

See Every Supplement That Interacts With Nimodipine

This page covers American Pawpaw only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Nimodipine page lists 227 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), American Mistletoe (major), Grapefruit (major) and St. John's Wort (major).

By severity: 6 major · 180 moderate · 41 minor.

From our pharmacist’s overview on the Nimodipine page

“Nimodipine (Nimotop, Nymalize) is given after bleeding around the brain to stop blood vessels from clamping down, and the supplement interactions on file earn real caution, not a shrug. Of the 227 ingredients listed, most either interfere with CYP3A4, the liver enzyme that clears nimodipine, or lower blood pressure on their own and sta…”

Reviewed by 2 · Jul 18, 2026

Open the Nimodipine interaction page

How much people look this up

Where American Pawpaw and Nimodipine 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 American Pawpaw
Steady interest

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

29 days ago today
Medication Nimodipine
Steady interest

#2,494 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 American Pawpaw reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 27, 2026. The American Pawpaw and Nimodipine 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 American Pawpaw

What is American Pawpaw?

American Pawpaw
  • Anticancer interest
  • Lice and head lice treatment (topical)
  • Traditional digestive remedy
  • General wellness/antioxidant
  • Insecticide (historical seed use)

American pawpaw is a North American fruit tree whose leaves, twigs, and seeds contain compounds called acetogenins that have shown cancer-cell-killing activity in laboratory studies. However, strong human evidence for any health benefit is lacking, and the seeds, bark, and unripe parts can be toxic, so supplements should be used cautiously and only under professional guidance.

Asimina triloba · Annonaceae · Fruit, seeds, bark, leaves, and twigs · Fresh fruit, capsules, extracts, and standardized acetogenin products

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

American Pawpaw: dosing

There is no established standardized dose for American pawpaw supplements. Products vary widely in strength and which part of the plant they use, which makes safe dosing hard to determine.If you choose to use a pawpaw product, follow the directions on the label and do not exceed them.

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

Read the full American Pawpaw monograph & all interactions
Medication

About Nimodipine

What Is Nimodipine Used For?

Brand names: Nimotop, Nymalize

Nimodipine — available as capsules and oral solution — is used to improve neurological outcomes after a subarachnoid hemorrhage (SAH), a type of bleeding that occurs around the brain when an intracranial berry aneurysm ruptures. It works to reduce the incidence and severity of ischemic deficits (areas of the brain damaged by reduced blood flow) that can follow this kind of bleed.

This use applies across nimodipine capsules, nimodipine oral solution, and Nymalize oral solution. It is indicated for adult patients regardless of how severe their neurological condition is at the time treatment begins.

Most-Reported Side Effects for Nimodipine

From FAERS, the FDA’s public side-effect reporting system (1,102 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Hypotension 57 reports
Subarachnoid haemorrhage 41 reports
Diarrhea 33 reports
Dizziness 33 reports
Headache 33 reports
See full Nimodipine drug information
Keep checking

Other Drugs & American Pawpaw

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

0Major
0Moderate
25Minor
2,804No known interaction
25 Minor 2,804 No interaction
Minor

25 interactions

No interaction 2,804 drugs checked — show the list

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

Showing the 60 most looked-up of 2,804 medications checked with no known interaction — see the full American Pawpaw list.

See the full American Pawpaw interactions page
See every supplement checked against Nimodipine, ranked by severity
Evidence & sources

American Pawpaw References

The 4 references that drive our American Pawpaw 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. Avalos J, Rupprecht JK, McLaughlin JL, et al. Guinea pig maximization test of the bark extract from pawpaw, Asimina triloba (Annonaceae). Contact Dermatitis 1993;29:33-5.
  2. McCage, C. M., Ward, S. M., Paling, C. A., Fisher, D. A., Flynn, P. J., and McLaughlin, J. L. Development of a paw paw herbal shampoo for the removal of head lice. Phytomedicine 2002;9(8):743-748. PubMed
  3. Barber MA. Poisoning due to the papaw (Asimina triloba). JAMA. 1905;XLV(27):2013-2014. DOI
  4. McLaughlin JL. Paw paw and cancer: Annonaceous acetogenins from discover to commercial products. J Nat Prod. 2008;71:1311-1321.

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 American Pawpaw and Nimodipine Together: Common Questions

Is it safe to take American Pawpaw with Nimodipine?
We do not list a known interaction between American Pawpaw and Nimodipine. 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 American Pawpaw and Nimodipine have any of the same side effects?
Yes — our sources link each of them separately to 4 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.
How was the American Pawpaw and Nimodipine combination checked?
Interactions in our licensed database are recorded against drug classes. Nimodipine is filed under 3 classifications, and American Pawpaw has documented interactions with 1 drug class — none of Nimodipine's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does American Pawpaw interact with any other medications?
Yes. American Pawpaw has 25 documented drug interactions in our database — Nimodipine is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Nimodipine interact with any supplements?
Yes. Nimodipine has documented interactions with 227 supplements in our database — American Pawpaw is not one of them. The Nimodipine 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

American Pawpaw monograph Uses, safety profile, and every drug interaction in one place Nimodipine drug information The full plain-English guide to this medication Nimodipine supplement interactions Every supplement checked against Nimodipine, 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 4 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Nimodipine and American Pawpaw?

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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.