Drug & supplement interaction

Rye Grass + Sodium Phosphate (prescription drug)

Sodium Phosphate (prescription drug) brand name: Visicol.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Oct 4, 2026
The bottom line No known interaction

We found no known interaction between Rye Grass and Sodium Phosphate (prescription drug) 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.

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Interaction report

Rye Grass and Sodium Phosphate (prescription drug)

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 Sodium Phosphate (prescription drug) and Rye Grass 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 Rye Grass at all — not against Sodium Phosphate (prescription drug), 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.

Rye Grass safety at a glance

Rye Grass overall Use caution Generally well tolerated in studies, but long-term safety is not well established.
Pregnancy Avoid Not enough safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid Not enough safety information, so it is best avoided while breastfeeding.

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

Still wondering about combining Sodium Phosphate (prescription drug) and Rye Grass? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Rye Grass Itself Has Been Linked To

This is not an interaction — nothing below involves Sodium Phosphate (prescription drug). It is the side-effect record for Rye Grass on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Rye Grass, this list is the first place to look.

  • Heartburn / Nausea Additional detail

    “Orally, rye grass pollen extract can cause abdominal distention, heartburn, and nausea.”

    Rye Grass · Natural Medicines adverse-effect record, reported in dyspepsia.

    1 source cited
    1. 5293. Rugendorff EW, Weidner W, Ebeling L, Buck AC. Results of treatment with pollen extract (Cernilton N) in chronic prostatitis and prostatodynia. Br J Urol 1993;71:433-8.

Everything above comes from the Natural Medicines adverse-effect record for Rye Grass — expand a row for the licensed statement it rests on. We haven’t matched Sodium Phosphate (prescription drug) to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for Sodium Phosphate (prescription drug).

Overlapping uses

What Sodium Phosphate (prescription drug) Is Prescribed For, and What Rye Grass Has Been Studied For

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

Sodium Phosphate (prescription drug) is prescribed for: Sodium Phosphate enema is used to relieve occasional constipation. It works directly in the rectum and lower bowel, and most people see results within 1 to 5 minutes of use. It is a single-use, as-needed product — not something taken every day long-term. It is only for rectal use and should not be swallowed.

Rye Grass has been studied for:

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

    Rye Grass for constipation

    It is unclear if oral rye grass is beneficial in patients with constipation.

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 Sodium Phosphate (prescription drug) on your own; if you are taking Rye Grass 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 Sodium Phosphate (prescription drug)

This page covers Rye Grass only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Sodium Phosphate (prescription drug) page lists 18 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 · 8 moderate · 9 minor.

From our pharmacist’s overview on the Sodium Phosphate (prescription drug) page

“Before you take prescription sodium phosphate (Visicol) tablets to clear your bowel ahead of a colonoscopy, this list deserves genuine attention, and the lone major entry, activated charcoal, is where I would start. Charcoal soaks up drugs in the gut, and nearly all 18 ingredients here, mostly fibers, gums, and mucilage-rich herbs like…”

Reviewed by 2 · Jul 18, 2026

Open the Sodium Phosphate (prescription drug) interaction page

How much people look this up

Where Rye Grass and Sodium Phosphate (prescription drug) 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 Rye Grass
Steady interest

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

29 days ago today
Medication Sodium Phosphate (prescription drug)
Top 25%

#635 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 Rye Grass reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified October 4, 2026. The Rye Grass and Sodium Phosphate (prescription drug) 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 Rye Grass

What is Rye Grass?

  • Prostate symptoms (BPH)
  • Chronic prostatitis
  • Urinary symptoms
  • General wellness/nutrition
  • Allergy desensitization (research only)

Rye grass pollen extract is most often used as a supplement for prostate-related urinary symptoms, where some small studies suggest a possible benefit, but the overall evidence is limited and not conclusive. It is generally well tolerated, but it is not a proven treatment, and you should talk to your doctor or pharmacist before using it, especially if you have prostate or urinary problems.

Secale cereale · Poaceae · Pollen extract, grass (leaves), and seeds/grain · Tablets, capsules, pollen extracts, and dried grass powders

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

Rye Grass: dosing

There is no official or standardized dose for rye grass pollen extract. They can help you decide whether it is appropriate for you and review it alongside your other medicines and conditions.

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

Read the full Rye Grass monograph & all interactions
Medication

About Sodium Phosphate

What Is Sodium Phosphate Used For?

Brand name: Visicol

Sodium Phosphate enema is used to relieve occasional constipation. It works directly in the rectum and lower bowel, and most people see results within 1 to 5 minutes of use.

It is a single-use, as-needed product — not something taken every day long-term. It is only for rectal use and should not be swallowed.

See full Sodium Phosphate drug information
Keep checking

Other Drugs & Rye Grass

Browse every other medication we’ve checked against Rye Grass — 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 Rye Grass 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 Rye Grass list.

See the full Rye Grass interactions page
See every supplement checked against Sodium Phosphate (prescription drug), ranked by severity
Evidence & sources

Rye Grass References

The 1 references that drive our Rye Grass 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. Rugendorff EW, Weidner W, Ebeling L, Buck AC. Results of treatment with pollen extract (Cernilton N) in chronic prostatitis and prostatodynia. Br J Urol 1993;71:433-8.

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 Rye Grass and Sodium Phosphate (prescription drug) Together: Common Questions

Is it safe to take Rye Grass with Sodium Phosphate (prescription drug)?
We do not list a known interaction between Rye Grass and Sodium Phosphate (prescription drug). 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.
Are Rye Grass and Sodium Phosphate (prescription drug) 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 Rye Grass in each. That is a conversation for your prescriber, especially if Sodium Phosphate (prescription drug) is being adjusted to a target.
Does Sodium Phosphate (prescription drug) interact with any supplements?
Yes. Sodium Phosphate (prescription drug) has documented interactions with 18 supplements in our database — Rye Grass is not one of them. The Sodium Phosphate (prescription drug) 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

Rye Grass monograph Uses, safety profile, and every drug interaction in one place Sodium Phosphate drug information The full plain-English guide to this medication Sodium Phosphate (prescription drug) supplement interactions Every supplement checked against Sodium Phosphate (prescription drug), 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Sodium Phosphate (prescription drug) and Rye Grass?

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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.