Interactions on record — worth a quick check against your medications. Check your meds →
Dietary supplement

Zhi Zi Ingredients & Drug Interactions

by Hawaii Pharm

Zhi Zi label
See full label image
Liquid Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Zhi Zi against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Zhi Zi is a dietary supplement by Hawaii Pharm with 1 active ingredient. Its ingredients are commonly taken for liver and digestive complaints, fever and inflammation, anxiety, restlessness, and trouble sleeping.Based on those ingredients, 21 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Gardenia jasminoides Fruit Extract, Dry. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Zhi Zi by Hawaii Pharm

Ask about any prescription or over-the-counter medication and we check it for interactions with Zhi Zi by Hawaii Pharm — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Zhi Zi by Hawaii Pharm

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Oct 1, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

Zhi Zi contains one active ingredient: Gardenia jasminoides Fruit Extract. This traditional herb has been used to address several conditions, though the scientific evidence for most of them isn't yet established in the data we hold.

The liquid form also contains alcohol, water, and glycerin as inactive ingredients.

Does it work?

Couldn't assess
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

This is a single-ingredient Gardenia product and its label doesn't state a use — see Gardenia's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence we have is insufficient to rate gardenia for anxiety, dementia, depression, diabetes, high blood pressure, or influenza. That means studies so far haven't provided reliable proof one way or the other.

If you're considering this product for a specific health goal, ask your doctor or pharmacist whether the current evidence supports its use for your situation.

The evidence, ingredient by ingredient Gardenia

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Safety data on gardenia are limited, especially for larger amounts or long-term use. The safety data advises against use during pregnancy and while breastfeeding because there isn't enough information to know whether it's safe in those settings.

Adverse effects are uncommon but worth knowing. Applied to skin, gardenia can trigger allergic contact dermatitis in sensitive people.

Taken by mouth, there's a single case report of blue-gray skin pigmentation in a 77-year-old woman who took a multi-herb product containing gardenia for seven years; the discoloration improved gradually after she stopped. Because human safety data overall are limited, long-term or high-dose use hasn't been well studied.

Side effects, ingredient by ingredient Gardenia

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Gardenia.
  • The most serious interaction on file is rated Moderate.
  • For scale: 21 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

If you take stimulant laxatives—either regularly or occasionally—check with your doctor or pharmacist before adding this product. Gardenia may intensify their effects and side effects.

For other medications, no interactions are documented in our data for the ingredient we could check; that's not a guarantee none exist, so it's still worth confirming your exact medications with your healthcare provider.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Zhi Zi is a single-ingredient gardenia extract liquid used in traditional practice, but scientific evidence for its effectiveness isn't established yet. The main concern is a moderate interaction with stimulant laxative medications.

If you take any laxatives, are pregnant, breastfeeding, or considering this for a specific health condition, talk it over with your doctor or pharmacist before starting.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Sep 25, 2023.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Zhi Zi, straight from the product label.

Brand Hawaii Pharm
Barcode (UPC) 840253659415
Net contents 4 Fluid Ounce(s); 120 mL
Market status On market
Date entered into DSLD Sep 25, 2023
DSLD ID 302023
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Zhi Zi by Hawaii Pharm, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
0.7 mL
Maximum serving Sizes:
1 mL
Servings per container
120
UPC/BARCODE
840253659415
IngredientAmount% DV
Gardenia jasminoides Fruit Extract, Dry983 mg--

Other ingredients: Alcohol, Water, Glycerin

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Brand IP Statement(s)

Hawaii Pharm Herbal Extract Highest quality since 2008

Suggested/Recommended/Usage/Directions

Suggested use: Shake well before using. For adults add about 20-30 drops (0.7-1 mL, one full squeeze of the dropper bulb) to some juice or water, up to 4 times a day.

Precautions

Warning: We recommend to seek expert medical advice before taking.

Do not use if you are allergic to any ingredients.

Consult your physician before giving to children under 18, during pregnancy, if nursing or taking medications.

Consult your physician before giving to children under 18, during pregnancy, if nursing or taking medications.

May affect the ability to drive and operate machinery. May have contraindications, can cause side effects and adverse reactions. Do not use if seal is broken or missing.

Keep out of the reach of children!

Storage

Store in a cool dry place.

Seals/Symbols

cGMP Made in compliance with cGMP 21 CFR 111 in an FDA registered and inspected facility.

Organic Alcohol Based USA Made in United States of America

FDA Disclaimer Statement

This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure or prevent any disease.

General Statements

Scan this QR-code to get 15% discount on your next purchase. Limited time deal.

Formula

Gardenia jasminoides

Organic Alcohol Based

Formulation

Only natural ingredients Purity is laboratory tested and verified

All the raw materials are gluten-free by their nature No artificial colors, flavors, or preservatives

Not tested on animals

Organic Alcohol Based

Made in USA, Hawaii

FDA Statement of Identity

Herbal Supplement

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Zhi Zi by Hawaii Pharm label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Zhi Zi label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Zhi Zi by Hawaii Pharm

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size0.7 mL Dosage formLiquid Servings per container120 Amounts shown are per serving.

Gardenia jasminoides Fruit Extract, Dry

Interacts with
21 drugs
983 mg per serving

Gardenia fruit has a long history in traditional Chinese medicine and is also used as a natural food coloring. While early lab and animal studies are...

Gardenia jasminoides Fruit Extract, Dry monograph & interactions

Other (inactive) ingredients: Alcohol, Water, Glycerin. These complete the product’s ingredient list but are not active constituents.

Interaction report

Zhi Zi by Hawaii Pharm Drug Interactions

Want to check YOUR meds against Zhi Zi?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
21Drugs
21 Moderate

Ingredients driving the most interactions

Gardenia jasminoides Fruit Extract, Dry 21

Individual Drug Interactions

The ingredients in Zhi Zi interact with 21 drugs. Click any drug to see the details.

1 of the 1 ingredient in Zhi Zi interact with drugs. Each result below shows which ingredient is responsible. Gardenia jasminoides Fruit Extract, Dry

Each ingredient & the kinds of drugs it affects

For each ingredient in Zhi Zi with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Gardenia jasminoides Fruit Extract, Dry1 drug type · 21 drugs

Stimulant Laxatives

Theoretically, gardenia might increase the effects and adverse effects of stimulant laxatives.
Animal research shows that geniposide, a glucoside found in gardenia fruit, may function as a laxative and cause diarrhea when taken orally.

Likelihood Possible Evidence D
Gardenia jasminoides Fruit Extract, Dry full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Zhi Zi, from the product label.

Hawaii Pharm

See all Hawaii Pharm products
Name
Hawaii Pharm LLC
Street Address
510 Sumner St. Ste. 613
City
Honolulu
State
HI
ZipCode
96817
Phone Number
888-854-2924
Web Address
www.hawaiipharm.com
Pharmacist Counseling Corner

Zhi Zi by Hawaii Pharm: Common Questions

Does Zhi Zi by Hawaii Pharm interact with any medications?
Yes. Based on its ingredients, Zhi Zi has a known interaction with 21 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Zhi Zi contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take Zhi Zi while pregnant or breastfeeding?
The safety data advises against it during both pregnancy and breastfeeding because there isn't enough information to know whether it's safe. Talk with your doctor or pharmacist for personalized advice.
What should I watch for if I take this product?
Allergic contact dermatitis can happen if it touches your skin, especially if you're sensitive. If you take it by mouth, there's very limited safety data, so long-term use hasn't been well studied. Stop and contact your healthcare provider if you notice unusual skin color changes or unexpected side effects.
Does gardenia actually work for anxiety, depression, or blood pressure?
The scientific evidence we hold is insufficient to say. That doesn't mean it doesn't work—it means reliable studies haven't been done yet. If you're interested in it for one of these conditions, your doctor or pharmacist can give you better guidance on whether to try it.
I take a laxative regularly. Is Zhi Zi okay to use?
Not without checking first. Gardenia contains compounds that may strengthen laxative effects, raising the risk of stronger side effects like diarrhea. Talk with your doctor or pharmacist about whether it's safe to combine them or if you need to adjust how you take either one.

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

Not sure if Zhi Zi is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Zhi Zi label
Go deeper

The Full Monographs Behind Zhi Zi’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Gardenia

Interacts with 21 drugs

Gardenia fruit has a long history in traditional Chinese medicine and is also used as a natural food coloring. While early lab and animal studies are interesting, strong human evidence for i...

Read the full Gardenia monograph →
Sources

Sources & How We Checked

Zhi Zi's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

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

The 5 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Gardenia 5 references
  1. Kubo, Y., Nonaka, S., and Yoshida, H. Allergic contact dermatitis from gardenia fruit. Contact Dermatitis 1990;22(2):65-7. PubMed
  2. Yamauchi, K., Fujimoto, N., Kuwano, S., Inouye, H., and Inoue, K. The mechanism of purgative action of geniposide, an iridoid glucoside of the fruit of Gardenia, in mice. Planta Med 1976;30(1):39-47.
  3. Paulsen, E., Skov, P. S., and Andersen, K. E. Immediate skin and mucosal symptoms from pot plants and vegetables in gardeners and greenhouse workers. Contact Dermatitis 1998;39(4):166-170. PubMed
  4. Mizawa M, Andoh T, Shimizu T. Gardenia fruit-related blue-gray skin pigmentation. JAMA Dermatol. 2020. PubMed
  5. Tong T, Fu J, Kong Y. Recurrent Abdominal Pain in a 61-Year-Old Woman. Gastroenterology 2023;164(6):887-890. PubMed

See these in context on the Gardenia monograph →

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

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