Drug & supplement interaction

Sundew + Dronabinol

Dronabinol brand names: Marinol, Syndros.

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 Sundew and Dronabinol 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

Sundew and Dronabinol

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 Dronabinol and Sundew 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 Sundew at all — not against Dronabinol, 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.

Sundew safety at a glance

Sundew overall Use caution Generally used in small traditional amounts, but human safety data are limited.
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 Dronabinol and Sundew? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Dronabinol’s Own FDA Label Lists

This is not an interaction — none of it involves Sundew. These are the most notable effects listed in the ADVERSE REACTIONS section of Dronabinol’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. 8 of them are worth acting on rather than waiting out — marked below.

  • Memory problems Worth acting on
  • Unsteadiness Worth acting on
  • Hallucinations Worth acting on
  • Fainting Worth acting on
  • Confusion Worth acting on
  • Seizures Worth acting on
  • Hives Worth acting on
  • An allergic reaction Worth acting on
  • Vivid dreams or nightmares
  • Weight loss

Showing the 10 most notable of 31 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 Dronabinol. Read the label on DailyMed › Where a percentage is shown, it is the share of 7,993 voluntary FDA FAERS reports for Dronabinol that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Sundew’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Sundew side to compare — that is a limit of the record, not a statement that Sundew has no side effects.

Everything else you take

See Every Supplement That Interacts With Dronabinol

This page covers Sundew only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Dronabinol page lists 151 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate) and Adrafinil (moderate).

By severity: 3 major · 107 moderate · 41 minor.

From our pharmacist’s overview on the Dronabinol page

“A glass of grapefruit juice can push dronabinol (Marinol, Syndros), the prescription form of THC used for chemotherapy nausea and appetite loss, to higher blood levels than intended, amplifying dizziness, sedation, and its mind-altering effects. That is one of three major-rated interactions among the 151 supplements and herbs on file,…”

Reviewed by 2 · Jul 18, 2026

Open the Dronabinol interaction page

One more smart check

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

We hold 13 real supplement products containing Sundew, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Sundew. Even though Sundew itself has no known interaction with Dronabinol, 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 Sundew and Dronabinol 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 Sundew
Steady interest

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

29 days ago today
Medication Dronabinol
Steady interest

#2,096 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. Sundew 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 Sundew reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Sundew and Dronabinol 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 Sundew

What is Sundew?

  • Cough
  • Bronchitis
  • Whooping cough
  • Asthma-related symptoms
  • Sore throat
  • Spasmodic dry cough

Sundew is a small carnivorous plant used traditionally as a cough and respiratory remedy, often in combination cough syrups and homeopathic products. Modern human evidence for its effectiveness is very limited, so it should be seen as a traditional remedy rather than a proven treatment. Talk to your pharmacist or doctor before using it, especially if you are pregnant, breastfeeding, or giving it to a child.

Drosera rotundifolia · Droseraceae · Whole flowering plant (aerial parts) · Tincture, tea, syrup, capsules, homeopathic preparations, lozenges

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

Sundew: dosing

There is no well-established standardized dose for sundew. It is usually taken as part of a tincture, tea, syrup, lozenge, or homeopathic product, and the amount varies widely from product to product.The safest approach is to follow the directions on the product label and not exceed the recommended amount.

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

Read the full Sundew monograph & all interactions
Medication

About Dronabinol

What Is Dronabinol Used For?

Brand names: Marinol, Syndros

Dronabinol — available as capsules (Marinol, Dronabinol) and as an oral solution (Syndros, Dronabinol oral solution) — is approved for two conditions in adults. First, it treats anorexia (severely reduced appetite) associated with weight loss in patients with AIDS. Second, it controls nausea and vomiting caused by cancer chemotherapy in patients who have not gotten enough relief from standard anti-nausea treatments.

Both uses apply to all available formulations, but dosing timing and meal instructions differ between the capsule and oral solution products. Always follow the specific instructions for the product you have been prescribed.

Most-Reported Side Effects for Dronabinol

From FAERS, the FDA’s public side-effect reporting system (7,993 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Nausea 894 reports
Fatigue 708 reports
Diarrhea 615 reports
Vomiting 591 reports
Decreased appetite 452 reports
See full Dronabinol drug information
Keep checking

Other Drugs & Sundew

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

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

Sundew References

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

  1. Sundew — MedlinePlus / U.S. National Library of Medicine 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 Sundew and Dronabinol Together: Common Questions

Is it safe to take Sundew with Dronabinol?
We do not list a known interaction between Sundew and Dronabinol. 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 Dronabinol interact with any supplements?
Yes. Dronabinol has documented interactions with 151 supplements in our database — Sundew is not one of them. The Dronabinol 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

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

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.