Drug & supplement interaction

Patchouli Oil + Carbidopa

Carbidopa brand name: Lodosyn.

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 Patchouli Oil and Carbidopa 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

Patchouli Oil and Carbidopa

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 Carbidopa and Patchouli Oil 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 Patchouli Oil at all — not against Carbidopa, 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.

Patchouli Oil safety at a glance

Patchouli Oil overall Use caution Generally considered safe for topical and aromatherapy use when diluted, but can irritate skin and should not be swallowed.
Pregnancy Avoid Safety is not established, so avoid use during pregnancy unless cleared by your doctor.
Breastfeeding Avoid Not enough safety information exists, 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 Carbidopa and Patchouli Oil? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Carbidopa’s Own FDA Label Lists

This is not an interaction — none of it involves Patchouli Oil. These are the most notable effects listed in the ADVERSE REACTIONS section of Carbidopa’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. 10 of them are worth acting on rather than waiting out — marked below.

  • Hallucinations Worth acting on mentioned in 8.7% of FDA reports for Carbidopa
  • Trouble swallowing Worth acting on
  • Bleeding in the gut Worth acting on
  • Trouble passing urine Worth acting on
  • A heart attack Worth acting on
  • Fainting Worth acting on
  • Confusion Worth acting on
  • Seizures Worth acting on
  • Chest pain Worth acting on
  • Low mood Worth acting on

Showing the 10 most notable of 54 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 Carbidopa. Read the label on DailyMed › Where a percentage is shown, it is the share of 52,609 voluntary FDA FAERS reports for Carbidopa that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Patchouli Oil’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Patchouli Oil side to compare — that is a limit of the record, not a statement that Patchouli Oil has no side effects.

Everything else you take

See Every Supplement That Interacts With Carbidopa

This page covers Patchouli Oil only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Carbidopa page lists 21 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Magnesium (major), 5-htp (moderate), Coffee Charcoal (moderate) and European Mandrake (moderate).

By severity: 2 major · 10 moderate · 9 minor.

From our pharmacist’s overview on the Carbidopa page

“Carbidopa (Lodosyn) keeps levodopa working in Parkinson's disease, so anything that blocks its absorption can cost real motor control, and two of the 21 supplements on this list do exactly that at a level rated major. Magnesium is the one that surprises people: in a human study it cut carbidopa absorption by 81 percent and levodopa's b…”

Reviewed by 2 · Jul 18, 2026

Open the Carbidopa interaction page

How much people look this up

Where Patchouli Oil and Carbidopa 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 Patchouli Oil
Steady interest

#1,058 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Carbidopa
Top half

#835 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 Patchouli Oil reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Patchouli Oil and Carbidopa 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 Patchouli Oil

What is Patchouli Oil?

  • Aromatherapy and relaxation
  • Skin care
  • Insect repellent
  • Fragrance and perfume
  • Antimicrobial use
  • Mood support

Patchouli oil is an essential oil pressed from the leaves of the patchouli plant, used mainly for its strong, earthy scent in aromatherapy, skin products, and perfumes. Most claimed health benefits come from laboratory studies rather than solid human trials, so its real-world value remains unproven. Like all essential oils, it should be diluted before skin use and never swallowed unless directed by a qualified professional.

Pogostemon cablin · Lamiaceae · Leaves (dried and steam-distilled essential oil) · Essential oil, diluted oil blends, soaps, lotions, perfumes, incense

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

Patchouli Oil: dosing

There is no established standard dose for patchouli oil, and it is not meant to be taken by mouth. For topical use, it is typically diluted to a small percentage in a carrier oil before being applied to the skin.For aromatherapy, a few drops may be added to a diffuser according to the product directions.

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

Read the full Patchouli Oil monograph & all interactions
Medication

About Carbidopa

What Is Carbidopa Used For?

Brand name: Lodosyn

Carbidopa tablets — sold under the brand name Lodosyn and as generic carbidopa — are used together with levodopa or carbidopa-levodopa to manage symptoms of Parkinson's disease, postencephalitic parkinsonism, and symptomatic parkinsonism that can result from carbon monoxide or manganese poisoning. Carbidopa is never used alone; it always works as a partner to levodopa-based therapy.

Lodosyn is specifically used when a patient taking carbidopa-levodopa isn't getting enough daily carbidopa from that combination, or when a patient needs the two drugs individually titrated (adjusted) rather than taken as a fixed combination. Adding carbidopa helps reduce the nausea and vomiting that levodopa often causes and allows lower doses of levodopa to be used.

Most-Reported Side Effects for Carbidopa

From FAERS, the FDA’s public side-effect reporting system (52,609 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fall 4,954 reports
Hallucination 4,554 reports
Tremor 3,533 reports
Dyskinesia 3,174 reports
Dizziness 2,837 reports
See full Carbidopa drug information
Keep checking

Other Drugs & Patchouli Oil

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

See the full Patchouli Oil interactions page
See every supplement checked against Carbidopa, ranked by severity
Evidence & sources

Patchouli Oil References

The 2 references that drive our Patchouli Oil 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. Das NG, Dhiman S, Talukdar PK, Rabha B, Goswami D, Veer V. Synergistic mosquito-repellent activity of Curcuma longa, Pogostemon heyneanus and Zanthoxylum limonella essential oils. J Infect Public Health. 2015 Jul-Aug;8(4):323-8. PubMed
  2. Shin YK, Lee SY, Lee JM, Kang P, Seol GH. Effects of short-term inhalation of patchouli oil on professional quality of life and stress levels in emergency nurses: A randomized controlled trial. J Altern Complement Med. 2020 Nov;26(11):1032-1038. 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 Patchouli Oil and Carbidopa Together: Common Questions

Is it safe to take Patchouli Oil with Carbidopa?
We do not list a known interaction between Patchouli Oil and Carbidopa. 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 Carbidopa interact with any supplements?
Yes. Carbidopa has documented interactions with 21 supplements in our database — Patchouli Oil is not one of them. The Carbidopa 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

Patchouli Oil monograph Uses, safety profile, and every drug interaction in one place Carbidopa drug information The full plain-English guide to this medication Carbidopa supplement interactions Every supplement checked against Carbidopa, 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 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Carbidopa and Patchouli Oil?

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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.