Drug & supplement interaction

Manaca + Orphenadrine

Orphenadrine brand names: Norflex, Disipal, Banflex, Flexoject, Flexon, and others.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Manaca and Orphenadrine 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

Manaca and Orphenadrine

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 Orphenadrine and Manaca 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 Manaca at all — not against Orphenadrine, 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.

Manaca safety at a glance

Manaca overall Use caution It belongs to the potentially toxic nightshade family and lacks safety testing in humans.
Pregnancy Avoid Not enough safety data and possible toxicity make it unsafe to use during pregnancy.
Breastfeeding Avoid No reliable safety information exists, so avoid use while breastfeeding.

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

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

What Orphenadrine’s Own FDA Label Lists

This is not an interaction — none of it involves Manaca. These are the most notable effects listed in the ADVERSE REACTIONS section of Orphenadrine’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 6 of them are worth acting on rather than waiting out — marked below.

  • Hallucinations Worth acting on
  • Confusion Worth acting on
  • Anemia Worth acting on
  • A severe allergic reaction Worth acting on
  • Hives Worth acting on
  • An allergic reaction Worth acting on
  • Tremor or shakiness
  • Blurred vision
  • A fast or pounding heartbeat
  • Drowsiness

Showing the 10 most notable of 18 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Orphenadrine. Read the label on DailyMed › Manaca’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Manaca side to compare — that is a limit of the record, not a statement that Manaca has no side effects.

From our Q&A

Questions About Manaca or Orphenadrine

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Manaca or Orphenadrine, 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 Orphenadrine

This page covers Manaca only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Orphenadrine page lists 35 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Procaine (major), Adrafinil (moderate), African Wild Potato (moderate) and Artichoke (moderate).

By severity: 2 major · 22 moderate · 11 minor.

Open the Orphenadrine interaction page

How much people look this up

Where Manaca and Orphenadrine 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 Manaca
Steady interest

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

29 days ago today
Medication Orphenadrine
Top half

#1,271 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. Manaca is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Manaca reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Manaca and Orphenadrine records this page draws on were last updated June 22, 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 Manaca

What is Manaca?

  • Joint pain and arthritis
  • Rheumatism
  • Skin conditions
  • As a diuretic
  • Inflammation

Manaca (Brunfelsia uniflora) is a South American shrub traditionally used for arthritis, rheumatism, and skin problems. There is very little reliable human research to support these uses, and the plant belongs to the nightshade family and may be toxic, so caution is strongly advised. Talk to a pharmacist or doctor before using it.

Brunfelsia uniflora · Solanaceae · Roots and bark; sometimes leaves · Tincture, dried root, capsules, tea, homeopathic preparations

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

Manaca: dosing

There is no established or standardized dose for manaca. Because the plant may be toxic and has not been tested in proper human studies, safe dosing has not been determined.If you choose to use a product that contains manaca, follow the directions on the label and do not exceed them.

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

Read the full Manaca monograph & all interactions
Medication

About Orphenadrine

What Is Orphenadrine Used For?

Brand names: Norflex, Disipal, Banflex, Flexoject, Flexon, Norflex Injection

Orphenadrine citrate is used to ease discomfort from acute, painful musculoskeletal conditions — things like muscle pain and stiffness. It is always used as part of a broader treatment plan that includes rest and physical therapy, not as a stand-alone cure.

Both the extended-release tablet and the injection form are approved for this use. Neither form directly relaxes tight muscles — the relief it provides is thought to be related to its pain-relieving (analgesic) properties.

See full Orphenadrine drug information
Keep checking

Other Drugs & Manaca

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

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

Manaca References

The 1 sources that drive our Manaca monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Manaca is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Using Dietary Supplements Safely — NIH MedlinePlus Source

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 Manaca and Orphenadrine Together: Common Questions

Is it safe to take Manaca with Orphenadrine?
We do not list a known interaction between Manaca and Orphenadrine. 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 Orphenadrine interact with any supplements?
Yes. Orphenadrine has documented interactions with 35 supplements in our database — Manaca is not one of them. The Orphenadrine 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

Manaca monograph Uses, safety profile, and every drug interaction in one place Orphenadrine drug information The full plain-English guide to this medication Orphenadrine supplement interactions Every supplement checked against Orphenadrine, 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 Orphenadrine and Manaca?

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.