Drug & supplement interaction

Nerve Root + Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine

Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine brand names: Histalet Forte, Poly Hist Forte, Vanex Forte.

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 Nerve Root and Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine 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

Nerve Root and Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine

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 Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine and Nerve Root 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 Nerve Root at all — not against Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine, 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.

Nerve Root safety at a glance

Nerve Root overall Use caution Human safety data are very limited and some plants in this group are rare or protected.
Pregnancy Possibly Unsafe When used orally; avoid using. Read the full pregnancy detail
Breastfeeding Possibly Unsafe When used orally; avoid using. Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine and Nerve Root? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Nerve Root Itself Has Been Linked To

This is not an interaction — nothing below involves Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine. It is the side-effect record for Nerve Root on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Nerve Root, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

  • Hallucinations Worth acting on Additional detail

    “There is currently a limited amount of information on the adverse effects of nerve root. Orally, nerve root may cause hallucinations, giddiness, restlessness, headache, and mental excitement, particularly when taken in large doses. Topically, nerve root may cause contact dermatitis (4).”

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

    1 source cited
    1. 4. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  • Anxiety or restlessness / Headache Additional detail

    “Orally, nerve root may cause giddiness, restlessness, headache, and mental excitement, particularly when taken in large doses (4).”

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

    1 source cited
    1. 4. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  • A skin rash Additional detail

    “Topically, nerve root may cause contact dermatitis (4).”

    Nerve Root · Natural Medicines adverse-effect record, reported in dermatitis.

    1 source cited
    1. 4. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.

Everything above comes from the Natural Medicines adverse-effect record for Nerve Root — expand a row for the licensed statement it rests on. We haven’t matched Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine 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 Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine.

Special populations

Nerve Root in Pregnancy & Breastfeeding

Pregnancy And Lactation Possibly Unsafe

When used orally; avoid using.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

Everything else you take

See Every Supplement That Interacts With Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine

This page covers Nerve Root only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine page lists 229 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Ephedra (major), Grapefruit (major), Henbane (major) and Lithium (major).

By severity: 10 major · 175 moderate · 44 minor.

From our pharmacist’s overview on the Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine page

“Ephedra is the first thing I would take off the shelf for anyone using chlorpheniramine, phenylephrine, phenylpropanolamine, and pyrilamine (Histalet Forte, Poly Hist Forte, Vanex Forte). This cold and allergy combination contains two decongestants that already raise blood pressure and heart rate, and 44 ingredients on this list, ephed…”

Reviewed by 2 · Jul 18, 2026

Open the Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine interaction page

One more smart check

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

We hold 10 real supplement products containing Nerve Root, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Nerve Root. Even though Nerve Root itself has no known interaction with Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine, 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 Nerve Root and Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine 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 Nerve Root
Steady interest

#1,155 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine
Top half

#1,046 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 Nerve Root reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Nerve Root and Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine 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 Nerve Root

What is Nerve Root?

  • Anxiety and nervous tension
  • Trouble sleeping
  • Restlessness
  • Mild pain or muscle tension
  • Headache

Nerve Root, also called lady's slipper, is the root of certain Cypripedium orchids that was traditionally used in folk and Native American medicine as a calming, sleep-promoting remedy. There is very little modern scientific evidence to support these uses, and many of these orchids are now rare or protected. Talk with a pharmacist or doctor before using it, and avoid it during pregnancy and breastfeeding.

Cypripedium parviflorum · Orchidaceae · Dried root and rhizome · Dried root, tincture, tea, capsules

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

Nerve Root: dosing

There is no established, standardized dose for Nerve Root. Traditional amounts varied widely and were not tested for safety in controlled studies.If you choose to use a product, follow the directions on the label and do not exceed them.

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

Read the full Nerve Root monograph & all interactions
Keep checking

Other Drugs & Nerve Root

Browse every other medication we’ve checked against Nerve Root — 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 Nerve Root 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 Nerve Root list.

See the full Nerve Root interactions page
See every supplement checked against Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine, ranked by severity
Evidence & sources

Nerve Root References

The 1 references that drive our Nerve Root 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. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.

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 Nerve Root and Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine Together: Common Questions

Is it safe to take Nerve Root with Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine?
We do not list a known interaction between Nerve Root and Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine. 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.
Does Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine interact with any supplements?
Yes. Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine has documented interactions with 229 supplements in our database — Nerve Root is not one of them. The Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine 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

Nerve Root monograph Uses, safety profile, and every drug interaction in one place Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine supplement interactions Every supplement checked against Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine, 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 Chlorpheniramine, Phenylephrine, Phenylpropanolamine, Pyrilamine and Nerve Root?

Our pharmacists answer your medication & supplement questions — free.

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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.