Drug & supplement interaction

Pumpkin + Pentosan Polysulfate Sodium

Pentosan Polysulfate Sodium brand name: Elmiron.

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 Pumpkin and Pentosan Polysulfate Sodium 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.

Know someone taking this? Share
Facebook Post Reddit Email
On this page
Interaction report

Pumpkin and Pentosan Polysulfate Sodium

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 Pentosan Polysulfate Sodium and Pumpkin 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.

Pumpkin safety at a glance

Pumpkin overall Generally safe Pumpkin as food is well tolerated; concentrated seed-oil supplements are generally safe for most adults.
Pregnancy Use caution Pumpkin as a food is fine, but there is not enough data on concentrated seed supplements, so avoid them unless your doctor approves.
Breastfeeding Use caution Pumpkin as a food is fine, but safety of concentrated supplements during breastfeeding is not well studied.

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

Still wondering about combining Pentosan Polysulfate Sodium and Pumpkin? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Pentosan Polysulfate Sodium

Interactions in our licensed database are recorded against drug classes, not just single drug names. Pentosan Polysulfate Sodium is filed under a single classification — oral drugs. Pumpkin has documented interactions with 1 drug class — the most serious being lithium (moderate) — and none of Pentosan Polysulfate Sodium’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

Pumpkin Does Interact With Other Medications

Pumpkin has 1 moderate known drug interaction in our database — Pentosan Polysulfate Sodium isn’t one of them. If you take anything else, check it against the full list below.

Moderate 1 No known interaction 2,829 (incl. Pentosan Polysulfate Sodium)
Taking anything else?

Check Another of Your Medications Against Pumpkin

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

What to actually watch for

No Interaction Found — But Data Suggests Pumpkin and Pentosan Polysulfate Sodium 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. 3 of them are worth acting on rather than waiting out — marked below.

  • Shortness of breath / Hives / An allergic reaction Worth acting on Additional detail

    Pumpkin

    “Orally, pumpkin seed oil and pumpkin pulp have been reported to cause anaphylactic reactions in children and adults. A case review highlights 4 cases of anaphylaxis in children (3 from pumpkin pulp, 1 from pumpkin seeds), and 7 cases in adults (1 from pumpkin flesh, 6 from pumpkin seeds).”

    Pumpkin · Natural Medicines adverse-effect record, reported in pruritus.

    1 source cited
    1. 107843. Gawryjolek J, Ludwig H, Zbikowska-Götz M, Bartuzi Z, Krogulska A. Anaphylaxis after consumption of pumpkin seeds in a 2-y-old child tolerant to its pulp: A case study. Nutrition 2021;89:111272. PubMed

    Pentosan Polysulfate Sodium

    Listed in the ADVERSE REACTIONS section of the FDA label for Pentosan Polysulfate Sodium. Read the label on DailyMed ›

  • Hair loss Additional detail

    Pumpkin

    “There are two case reports of adult females developing substantial transient hair loss 1-3 weeks after consumption of a meal containing either bitter-tasting pumpkin or undefined squash. This adverse effect was attributed to a high concentration of cucurbitacin, which is commonly found in wild pumpkins.”

    Pumpkin · Natural Medicines adverse-effect record, reported in alopecia.

    1 source cited
    1. 104535. Assouly P. Hair loss associated with cucurbit poisoning. JAMA Dermatol. 2018 May 1;154(5):617-618. PubMed

    Pentosan Polysulfate Sodium

    Listed in the ADVERSE REACTIONS section of the FDA label for Pentosan Polysulfate Sodium. Read the label on DailyMed ›

  • Stomach upset / Diarrhea / Vomiting / Nausea reported in 3.9% of FDA reports for Pentosan Polysulfate Sodium Additional detail

    Pumpkin

    “Orally, pumpkin seed oil has been reported to cause mild abdominal discomfort in clinical trials. There are also two case reports of adults developing severe nausea, vomiting, and diarrhea following consumption of a meal containing either bitter-tasting pumpkin or undefined squash. These adverse effects were attributed to a high concentration of cucurbitacin, which is commonly found in wild pumpkins.”

    Pumpkin · Natural Medicines adverse-effect record, reported in diarrhea.

    3 sources cited
    1. 5093. Marks L, Partin AW, Epstein JI, et al. Effects of a saw palmetto herbal blend in men with symptomatic benign prostatic hyperplasia. J Urol 2000;163:1451-6. DOI
    2. 92378. Cho YH, Lee SY, Jeong DW, et al. Effect of pumpkin seed oil on hair growth in men with androgenetic alopecia: a randomized, double-blind, placebo-controlled trial. Evid Based Complement Alternat Med 2014;2014:549721. PubMed
    3. 104535. Assouly P. Hair loss associated with cucurbit poisoning. JAMA Dermatol. 2018 May 1;154(5):617-618. PubMed

    Pentosan Polysulfate Sodium

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

  • Itching Additional detail

    Pumpkin

    Recorded for Pumpkin in the same Natural Medicines adverse-effect record shown under Shortness of breath / Hives / An allergic reaction above.

    Pentosan Polysulfate Sodium

    Listed in the ADVERSE REACTIONS section of the FDA label for Pentosan Polysulfate Sodium. Read the label on DailyMed ›

Reported for Pumpkin but not commonly for Pentosan Polysulfate Sodium: a severe allergic reaction, trouble swallowing and swelling.

Effects for Pentosan Polysulfate Sodium come from the ADVERSE REACTIONS section of its FDA label; effects for Pumpkin come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 6,854 voluntary FDA FAERS reports for Pentosan Polysulfate Sodium 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.

Overlapping uses

What Pentosan Polysulfate Sodium Is Prescribed For, and What Pumpkin Has Been Studied For

These two come up together because they touch the same health topic — not because they do the same job. Pentosan Polysulfate Sodium is a prescription medicine with approved uses on its FDA label. Pumpkin is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.

Pentosan Polysulfate Sodium is prescribed for: Elmiron (pentosan polysulfate sodium) capsules are indicated for the relief of bladder pain or discomfort associated with interstitial cystitis — a chronic condition that causes bladder pressure, bladder pain, and sometimes pelvic pain.

Pumpkin has been studied for:

  • Interstitial cystitis studied, not established Pumpkin has been studied for this. Natural Medicines rates the evidence: Insufficient Reliable Evidence To Rate Read what the research shows

    Pumpkin for interstitial cystitis

    Although there is interest in using oral pumpkin for interstitial cystitis, there is insufficient reliable information about the clinical effects of pumpkin for this condition.

Effectiveness ratings and the research summaries above are the verbatim record from the Natural Medicines database, which grades evidence from “Effective” down to “Insufficient Reliable Evidence To Rate”. A rating below the top of that scale means researchers have looked at it — not that it works, and never that it can stand in for a prescribed medicine. Do not stop or replace Pentosan Polysulfate Sodium on your own; if you are taking Pumpkin for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

Everything else you take

See Every Supplement That Interacts With Pentosan Polysulfate Sodium

This page covers Pumpkin only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Pentosan Polysulfate Sodium page lists 17 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Coffee Charcoal (moderate), European Mandrake (moderate), Glucomannan (moderate) and Guar Gum (moderate).

By severity: 1 major · 7 moderate · 9 minor.

From our pharmacist’s overview on the Pentosan Polysulfate Sodium page

“If you take Elmiron (pentosan polysulfate sodium) for bladder pain from interstitial cystitis, this list deserves real attention, starting with one entry. Activated charcoal, the only major-rated interaction of the 17 on file, soaks up medications in the gut and can reduce how much of a dose ever reaches you.”

Reviewed by 2 · Jul 18, 2026

Open the Pentosan Polysulfate Sodium interaction page

One more smart check

Taking Pumpkin as Part of a Dietary Supplement Product? Check It for Interactions

We hold 2,055 real supplement products containing Pumpkin, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Pumpkin. Even though Pumpkin itself has no known interaction with Pentosan Polysulfate Sodium, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Pumpkin and Pentosan Polysulfate Sodium 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 Pumpkin
Top 10%

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

29 days ago today
Medication Pentosan Polysulfate Sodium
Steady interest

#2,640 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 Pumpkin reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Pumpkin and Pentosan Polysulfate Sodium 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 Pumpkin

What is Pumpkin?

Pumpkin
  • Benign prostatic hyperplasia (BPH) symptoms
  • Overactive bladder
  • Eye and skin health (vitamin A source)
  • General nutrition and fiber
  • Hair health

Pumpkin is a nutritious squash, and its seeds and seed oil are the parts most often used as supplements, mainly for urinary and prostate symptoms. The evidence for these uses is limited and mostly preliminary, though eating pumpkin as a food is safe and a good source of vitamin A, fiber, and antioxidants. Talk to your pharmacist or doctor before using concentrated pumpkin seed supplements.

Cucurbita pepo · Cucurbitaceae · Fruit flesh, seeds, and seed oil · Whole food, capsules, softgels (seed oil), powders, raw or roasted seeds

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

Pumpkin: dosing

There is no official standardized dose for pumpkin supplements. Studies have used different forms and amounts of seed or seed oil, so it is hard to recommend one exact dose.The best approach is to follow the directions on the product label and not exceed the recommended amount.

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

Read the full Pumpkin monograph & all interactions
Medication

About Pentosan Polysulfate

What Is Pentosan Polysulfate Used For?

Brand name: Elmiron

Elmiron (pentosan polysulfate sodium) capsules are indicated for the relief of bladder pain or discomfort associated with interstitial cystitis — a chronic condition that causes bladder pressure, bladder pain, and sometimes pelvic pain.

See full Pentosan Polysulfate drug information
Keep checking

Other Drugs & Pumpkin

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

0Major
1Moderate
0Minor
2,828No known interaction
1 Moderate 2,828 No interaction
Moderate

1 interaction

No interaction 2,828 drugs checked — show the list

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

Showing the 60 most looked-up of 2,828 medications checked with no known interaction — see the full Pumpkin list.

See the full Pumpkin interactions page
See every supplement checked against Pentosan Polysulfate Sodium, ranked by severity
Evidence & sources

Pumpkin References

The 5 references that drive our Pumpkin 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. Marks L, Partin AW, Epstein JI, et al. Effects of a saw palmetto herbal blend in men with symptomatic benign prostatic hyperplasia. J Urol 2000;163:1451-6. DOI
  2. Cho YH, Lee SY, Jeong DW, et al. Effect of pumpkin seed oil on hair growth in men with androgenetic alopecia: a randomized, double-blind, placebo-controlled trial. Evid Based Complement Alternat Med 2014;2014:549721. PubMed
  3. Vahlensieck W, Theurer C, Pfitzer E, Patz B, Banik N, Engelmann U. Effects of pumpkin seed in men with lower urinary tract symptoms due to benign prostatic hyperplasia in the one-year, randomized, placebo-controlled GRANU study. Urol Int 2015;94(3):286-95 PubMed
  4. Assouly P. Hair loss associated with cucurbit poisoning. JAMA Dermatol. 2018 May 1;154(5):617-618. PubMed
  5. Gawryjolek J, Ludwig H, Zbikowska-Götz M, Bartuzi Z, Krogulska A. Anaphylaxis after consumption of pumpkin seeds in a 2-y-old child tolerant to its pulp: A case study. Nutrition 2021;89:111272. PubMed

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 Pumpkin and Pentosan Polysulfate Sodium Together: Common Questions

Is it safe to take Pumpkin with Pentosan Polysulfate Sodium?
We do not list a known interaction between Pumpkin and Pentosan Polysulfate Sodium. 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 Pumpkin and Pentosan Polysulfate Sodium have any of the same side effects?
Yes — our sources link each of them separately to 9 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.
Are Pumpkin and Pentosan Polysulfate Sodium used for the same thing?
They overlap in purpose, which usually means the real question is whether you need both rather than whether they are safe together. This page lists the shared uses and how strong the evidence is for Pumpkin in each. That is a conversation for your prescriber, especially if Pentosan Polysulfate Sodium is being adjusted to a target.
How was the Pumpkin and Pentosan Polysulfate Sodium combination checked?
Interactions in our licensed database are recorded against drug classes. Pentosan Polysulfate Sodium is filed under 1 classification, and Pumpkin has documented interactions with 1 drug class — none of Pentosan Polysulfate Sodium'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 Pumpkin interact with any other medications?
Yes. Pumpkin has 1 documented drug interaction in our database — Pentosan Polysulfate Sodium 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 Pentosan Polysulfate Sodium interact with any supplements?
Yes. Pentosan Polysulfate Sodium has documented interactions with 17 supplements in our database — Pumpkin is not one of them. The Pentosan Polysulfate Sodium 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

Pumpkin monograph Uses, safety profile, and every drug interaction in one place Pentosan Polysulfate drug information The full plain-English guide to this medication Pentosan Polysulfate Sodium supplement interactions Every supplement checked against Pentosan Polysulfate Sodium, 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 5 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Pentosan Polysulfate Sodium and Pumpkin?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.