Drug & supplement interaction

Jackfruit + Ephedrine, Phenobarbital, Potassium Iodide, Theophylline

Ephedrine, Phenobarbital, Potassium Iodide, Theophylline brand names: Quadrinal, Mudrane.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Jackfruit has a moderate interaction with Ephedrine, Phenobarbital, Potassium Iodide, Theophylline. Theoretically, jackfruit seeds might cause additive sedation when taken with CNS depressants.

Read the full interaction report
SeverityModerate
LikelihoodPossible
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Jackfruit and Ephedrine, Phenobarbital, Potassium Iodide, Theophylline

Here is the interaction we found between these two, with the evidence behind it.

Moderate

CNS DEPRESSANTS

Why this applies to Ephedrine, Phenobarbital, Potassium Iodide, Theophylline

Ephedrine, Phenobarbital, Potassium Iodide, Theophylline falls under CNS DEPRESSANTS — the group Jackfruit interacts with.

Theoretically, jackfruit seeds might cause additive sedation when taken with CNS depressants.
Animal research shows that jackfruit seeds can cause sedation.
Severity Moderate Likelihood Possible Evidence D

Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

This combination product contains phenobarbital, a barbiturate that calms the nervous system and is the piece that matters here. The concern is simple: jackfruit seeds may have a mild sedating effect of their own, so in theory they could add to phenobarbital's drowsiness. That could mean feeling extra sleepy, foggy, lightheaded, or less coordinated than usual.

Honestly, this is a theoretical worry based only on animal studies, not real human reports, so I wouldn't lose sleep over it. Eating jackfruit as a normal food is very unlikely to cause a problem. Concentrated seed extracts are the bigger unknown. If you're using a strong jackfruit supplement, just run it by your pharmacist or doctor first, and notice how alert you feel.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Ratnasooriya WD, Jayakody JR. Artocarpus heterophyllus seeds inhibits sexual competence but not fertility of male rats. Indian J Exp Biol 2002;40(3):304-308.

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Jackfruit Also Interacts With Other Medications

Jackfruit has 436 moderate known drug interactions in our database — the Ephedrine, Phenobarbital, Potassium Iodide, Theophylline one above is one of them. If you take anything else, check it against the full list below.

Moderate 436 No known interaction 2,394 (incl. Ephedrine, Phenobarbital, Potassium Iodide, Theophylline)
Taking anything else?

Check Another of Your Medications Against Jackfruit

Covers the 2,830 medications we’ve checked against Jackfruit. Pick one to open its full report.

Everything else you take

See Every Supplement That Interacts With Ephedrine, Phenobarbital, Potassium Iodide, Theophylline

This page covers Jackfruit only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Ephedrine, Phenobarbital, Potassium Iodide, Theophylline page lists 179 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: 1,4-butanediol (major), Activated Charcoal (major), Beer (major), Black Tea (major) and Caffeine (major).

By severity: 22 major · 136 moderate · 21 minor.

From our pharmacist’s overview on the Ephedrine, Phenobarbital, Potassium Iodide, Theophylline page

“Quadrinal and Mudrane combine a stimulant (ephedrine) and a sedative (phenobarbital) with theophylline and potassium iodide, so supplements that push in either direction can cause real trouble, and this list of 179 interacting ingredients deserves genuine care. The everyday risk to understand is caffeine: with ephedrine it has been lin…”

Reviewed by 2 · Jul 18, 2026

Open the Ephedrine, Phenobarbital, Potassium Iodide, Theophylline interaction page

How much people look this up

Where Jackfruit and Ephedrine, Phenobarbital, Potassium Iodide, Theophylline 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 Jackfruit
Top half

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

29 days ago today
Medication Ephedrine, Phenobarbital, Potassium Iodide, Theophylline
Top half

#1,112 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.

Supplement

About Jackfruit

What is Jackfruit?

Jackfruit
  • General nutrition
  • Blood sugar support
  • Digestive health (fiber)
  • Antioxidant support
  • Wound care (traditional, latex/leaves)

Jackfruit is a large tropical fruit that is nutritious and safe to eat as a food, offering fiber, vitamin C, potassium, and antioxidants. While its leaves, seeds, and other parts are used in traditional medicine for things like blood sugar and digestion, strong human evidence for these supplement uses is limited. Talk to your pharmacist or doctor before using concentrated jackfruit products for a health condition.

Read the full Jackfruit monograph & all interactions
Keep checking

Other Drugs & Jackfruit

Browse every other medication we’ve checked against Jackfruit — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
436Moderate
0Minor
2,393No known interaction
436 Moderate 2,393 No interaction
Moderate

436 interactions

Showing 60 of 436 moderate interactions — see all 436 on the Jackfruit page.

No interaction 2,393 drugs checked — show the list

We also checked Jackfruit against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,393 medications checked with no known interaction — see the full Jackfruit list.

See the full Jackfruit interactions page
See every supplement checked against Ephedrine, Phenobarbital, Potassium Iodide, Theophylline, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Jackfruit monograph › Uses, safety, and every drug interaction in one place Ephedrine, Phenobarbital, Potassium Iodide, Theophylline supplement interactions › Every supplement checked against Ephedrine, Phenobarbital, Potassium Iodide, Theophylline, 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 Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Jackfruit and Ephedrine, Phenobarbital, Potassium Iodide, Theophylline Together: Common Questions

Can you take Jackfruit with Ephedrine, Phenobarbital, Potassium Iodide, Theophylline?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Jackfruit and Ephedrine, Phenobarbital, Potassium Iodide, Theophylline interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Still Have a Question About Ephedrine, Phenobarbital, Potassium Iodide, Theophylline and Jackfruit?

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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.