Major interaction on record — check this product against your medications before combining. Check your meds →
Dietary supplement

Phyto-Gen Crab Apple Bud Ingredients & Drug Interactions

by Genestra Brands

Phyto-Gen Crab Apple Bud label
See full label image
Liquid Category: Botanical
Most serious interaction: Major
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Phyto-Gen Crab Apple Bud 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: Major

Phyto-Gen Crab Apple Bud is a dietary supplement by Genestra Brands with 1 active ingredient. Its ingredients are commonly taken for general nutrition and fiber intake, heart and cholesterol health, blood sugar and weight management.Based on those ingredients, 300 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Crab Apple (Malus sylvestris) bud extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Phyto-Gen Crab Apple Bud by Genestra Brands

Ask about any prescription or over-the-counter medication and we check it for interactions with Phyto-Gen Crab Apple Bud by Genestra Brands — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Phyto-Gen Crab Apple Bud by Genestra Brands

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 Sep 3, 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.

Phyto-Gen Crab Apple Bud contains one active ingredient: crab apple (Malus sylvestris) bud extract in liquid form. The extract is prepared with purified water, ethanol, and glycerin as inactive ingredients (the carriers and preservatives that hold the active compound).

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 Apple product and its label doesn't state a use — see Apple'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 hold does not establish this product as effective for any of the conditions listed on the label — Alzheimer disease, cancer prevention, dental plaque, diabetes, and diarrhea all show insufficient reliable evidence to rate. That doesn't mean it can't help, but it means the clinical support isn't there yet.

The evidence, ingredient by ingredient Apple

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.

Apples as a food are well tolerated by most people. The most common side effects from apple products are mild — bloating and flatulence.

A small number of people with allergies to fruits in the Rosaceae family (apricot, almond, plum, peach, pear, strawberry) can also be allergic to apples, and rarely this has led to serious reactions including anaphylaxis. Apple seeds contain cyanide; eating normal amounts of crab apple bud extract carries no known risk, but consuming large amounts of whole apple seeds could cause poisoning.

For pregnancy and breastfeeding, safety data on concentrated extracts isn't established — talk with your doctor or pharmacist about whether this product is right for you during these times.

Side effects, ingredient by ingredient Apple

Meds to double-check

Major interaction found
Known Interaction Concern · database check
Major identified

At least one ingredient has a documented Major-severity interaction. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Apple.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: diabetes medications; lithium.
  • For scale: 300 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.

Before you take Phyto-Gen Crab Apple Bud, check with your doctor or pharmacist about any medications you're on for blood pressure control, heart rhythm, allergies, blood sugar, mood (particularly lithium), or kidney function — the extract may reduce how well these medications work. No interactions are documented in our data for other major drug categories, but the extract has confirmed effects on several important medication types.

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. Major medication interactions have been identified, and safety information is well characterized.

This product works through crab apple extract, which has significant interactions with blood pressure drugs, heart medications, allergy medications, blood sugar drugs, and lithium. The evidence for its labeled uses isn't established yet.

If you take any prescription medications, check your exact drug list with your doctor or pharmacist before starting this supplement.

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 Jul 23, 2020.

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 Phyto-Gen Crab Apple Bud, straight from the product label.

Brand Genestra Brands
Barcode (UPC) 883196117512
Net contents 0.5 fl. Oz.; 15 mL
Market status On market
Date entered into DSLD Jul 23, 2020
DSLD ID 231092
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years)
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 Phyto-Gen Crab Apple Bud by Genestra Brands, 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:
0.28 mL
Maximum serving Sizes:
0.28 mL
Servings per container
53
UPC/BARCODE
883196117512
IngredientAmount% DV
Crab Apple (Malus sylvestris) bud extract0.28 mL--

Other ingredients: purified Water, Ethanol, 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.
Suggested/Recommended/Usage/Directions

Recommended Dose: Take 10 drops once daily or as recommended by your health professional. Invert bottle to 45 degrees and shake lightly allowing drops to fall directly into mouth or in 1/4 oz of water.

General Statements

For warnings and additional information, see outer box.

Contents may not fill package in order to accommodate required labeling. Please rely on stated quantity.

Scan to learn about our quality excellence

Precautions

Keep out of the reach of children.

Use only if safety seal is intact.

Warning: If you are pregnant or lactating, have any health condition or are taking any medication, consult your health professional before use.

This product was sealed for your protection. Do not use if box or contents are open or damaged.

Storage

Store in a cool, dry place.

FDA Statement of Identity

Dietary Supplement

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

See for yourself

Phyto-Gen Crab Apple Bud by Genestra Brands label

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

Phyto-Gen Crab Apple Bud 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 Phyto-Gen Crab Apple Bud by Genestra Brands

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

Serving size0.28 mL Dosage formLiquid Servings per container53 Amounts shown are per serving.

Crab Apple (Malus sylvestris) bud extract

Interacts with
300 drugs
0.28 mL per serving

Apples are a nutritious whole food that provides fiber, vitamins, and antioxidant plant compounds, and eating them regularly fits well into a healthy...

Crab Apple (Malus sylvestris) bud extract monograph & interactions

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

Interaction report

Phyto-Gen Crab Apple Bud by Genestra Brands Drug Interactions

Want to check YOUR meds against Phyto-Gen Crab Apple Bud?

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
300Drugs
47 Major 253 Moderate

Ingredients driving the most interactions

Crab Apple (Malus sylvestris) bud extract 300

Individual Drug Interactions

The ingredients in Phyto-Gen Crab Apple Bud interact with 300 drugs. Click any drug to see the details.

1 of the 1 ingredient in Phyto-Gen Crab Apple Bud interact with drugs. Each result below shows which ingredient is responsible. Crab Apple (Malus sylvestris) bud extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Phyto-Gen Crab Apple Bud 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.

Crab Apple (Malus sylvestris) bud extract7 drug types · 300 drugs

Organic Anion-Transporting Polypeptide Substrates (Oatp)

Concomitant consumption of apple juice can significantly decrease oral absorption and blood levels of OATP substrates.
Research shows that consuming apple juice inhibits OATP, which reduces bioavailability of oral drugs that are substrates of OATP. Fexofenadine, atenolol, and aliskiren are substrates of OATP. Clinical research shows that coadministration of apple juice decreases bioavailability of fexofenadine by up to 78%, aliskiren by 63%, and atenolol by up to 82%. These effects appear to increase with larger quantities of apple juice. It is thought that apple juice might affect OATP for only a short time. Therefore, separating drug administration and consumption of apple juice by at least 4 hours might avoid this interaction.

Likelihood Likely Evidence B
Aliskiren (Tekturna, Rasilez)

Concomitant consumption of apple juice can significantly decrease oral absorption and blood levels of aliskiren.
Pharmacokinetic research shows that coadministration of apple juice 200 mL along with aliskiren 150 mg decreases the bioavailability of aliskiren by 63%. Apple juice seems to inhibit organic anion transporting polypeptide (OATP), which is involved in drug uptake in the gut, liver, and kidney. It is thought that apple juice might affect OATP for only a short time. Therefore, separating drug administration and consumption of apple juice by at least 4 hours might avoid this interaction.

Likelihood Probable Evidence B
Antidiabetes Drugs

Theoretically, consuming apple juice with antidiabetes drugs might interfere with blood glucose control.
Clinical research suggests that consuming apples or drinking apple juice can raise blood glucose levels, with the effects of drinking apple juice being more significant than consuming apples.

Likelihood Possible Evidence D
Antihypertensive Drugs

Consuming apple juice with antihypertensive drugs might interfere with blood pressure control.
Some clinical evidence suggests that consuming apple and cherry juice can increase blood pressure in elderly patients.

Likelihood Probable Evidence B
Atenolol (Tenormin)

Concomitant consumption of apple juice can significantly decrease oral absorption and blood levels of atenolol.
Pharmacokinetic research shows that coadministration of apple juice 600-1200 mL decreases levels of atenolol by 58% to 82% in a dose-dependent manner. Apple juice seems to inhibit organic anion transporting polypeptide (OATP), which is involved in drug uptake in the gut, liver, and kidney. It is thought that apple juice might affect OATP for only a short time. Therefore, separating drug administration and consumption of apple juice by at least 4 hours might avoid this interaction.

Likelihood Probable Evidence B
Fexofenadine (Allegra)

Concomitant consumption of apple juice can significantly decrease oral absorption and blood levels of fexofenadine.
Pharmacokinetic research shows that coadministration of apple juice 400-1200 mL along with fexofenadine 60-120 mg decreases bioavailability of fexofenadine by up to 78%. Coadministration with smaller quantities of apple juice (150 mL or less) does not appear to affect the bioavailability of fexofenadine. Apple juice seems to inhibit organic anion transporting polypeptide (OATP), which is involved in drug uptake in the gut, liver, and kidney. It is thought that apple juice might affect OATP for only a short time. Therefore, separating drug administration and consumption of apple juice by at least 4 hours might avoid this interaction.

Likelihood Likely Evidence B
Lithium

There is some concern that concomitant consumption of apple juice might decrease oral absorption and blood levels of lithium.
In one case report, a patient had an undetectable serum lithium level when lithium citrate was administered with apple juice. When lithium was administered with an alternative beverage, the lithium level became detectable and the patient demonstrated clinical improvement.

Likelihood Possible Evidence D
Crab Apple (Malus sylvestris) bud extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Phyto-Gen Crab Apple Bud, from the product label.

Genestra Brands

Name
Seroyal USA
City
Pittsburgh
State
PA
ZipCode
15275
Phone Number
1-888-737-6925
Web Address
seroyal.com
Pharmacist Counseling Corner

Phyto-Gen Crab Apple Bud by Genestra Brands: Common Questions

Does Phyto-Gen Crab Apple Bud by Genestra Brands interact with any medications?
Yes. Based on its ingredients, Phyto-Gen Crab Apple Bud has a known interaction with 300 medications, including 47 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Phyto-Gen Crab Apple Bud 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 this if I'm allergic to other fruits like peaches or strawberries?
People allergic to fruits in the Rosaceae family — apricot, almond, plum, peach, pear, and strawberry — can also be allergic to apples. If you have these allergies, talk with your doctor or pharmacist before starting this product.
What are the side effects?
The most common ones are bloating and flatulence. Rarely, people have allergic reactions, including anaphylaxis. Allergic reactions are more likely if you already have a food allergy to other fruits in the apple family.
Is it safe to take while pregnant or breastfeeding?
We don't have enough safety data on concentrated extracts during pregnancy and breastfeeding to say either way. Talk with your doctor or pharmacist about whether it's right for you during these times.
Does this product actually work for Alzheimer disease or diabetes?
The evidence we hold doesn't establish it as effective for those conditions yet. That doesn't mean it won't help, but clinical support isn't there right now.
Can I take this with blood pressure medication?
Not without checking first. Apple extract can interfere with blood pressure control and may reduce absorption of specific blood pressure drugs like atenolol and aliskiren. Talk with your doctor or pharmacist about your exact medications before starting.

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

Not sure if Phyto-Gen Crab Apple Bud is safe with your meds?

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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.

Phyto-Gen Crab Apple Bud label
Go deeper

The Full Monographs Behind Phyto-Gen Crab Apple Bud’s Ingredients

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

Herb & supplement monograph

Apple

Interacts with 300 drugs

Apples are a nutritious whole food that provides fiber, vitamins, and antioxidant plant compounds, and eating them regularly fits well into a healthy diet. While research suggests apples may...

Read the full Apple monograph →
Sources

Sources & How We Checked

Phyto-Gen Crab Apple Bud'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 16 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.

Apple 16 references
  1. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
  2. Bailey DG, Dresser GK, Munoz C, et al. Reduction of fexofenadine bioavailability by fruit juices. Clin Pharmacol Ther 2001;69:P21.
  3. Rodriguez J, Crespo JF, Lopez-Rubio A, et al. Clinical cross-reactivity among foods of the Rosaceae family. J Allergy Clin Immunol 2000;106:183-189. PubMed
  4. Greenblatt DJ. Analysis of drug interactions involving fruit beverages and organic anion-transporting polypeptides. J Clin Pharmacol 2009;49:1403-7. PubMed
  5. Bailey DG. Fruit juice inhibition of uptake transport: a new type of food-drug interaction. Br J Clin Pharmacol 2010;70:645-55. PubMed
  6. Kamath AV, Yao M, Zhang Y, Chong S. Effect of fruit juices on the oral bioavailability of fexofenadine in rats. J Pharm Sci 2005;94:233-9. PubMed
  7. Tapaninen T, Neuvonen PJ, Niemi M. Orange and apple juice greatly reduce the plasma concentrations of the OATP2B1 substrate aliskiren. Br J Clin Pharmacol 2011;71:718-26. PubMed
  8. Jeon H, Jang IJ, Lee S, et al. Apple juice greatly reduces systemic exposure to atenolol. Br J Clin Pharmacol 2012 May 11. doi: 10.1111/j.1365-2125.2012.04324.x. [Epub ahead of print]. PubMed
  9. Visvanathan, R., Chen, R., Horowitz, M., and Chapman, I. Blood pressure responses in healthy older people to 50 g carbohydrate drinks with differing glycaemic effects. Br J Nutr 2004;92(2):335-340. PubMed
  10. Asp, N. G., Agardh, C. D., Ahren, B., Dencker, I., Johansson, C. G., Lundquist, I., Nyman, M., Sartor, G., and Schersten, B. Dietary fibre in type II diabetes. Acta Med Scand Suppl 1981;656:47-50. PubMed
  11. Akamine Y, Miura M, Komori H, et al. Effects of one-time apple juice ingestion on the pharmacokinetics of fexofenadine enantiomers. Eur J Clin Pharmacol. 2014 Sep;70(9):1087-95. PubMed
  12. Luo J, Imai H, Ohyama T, et al. The Pharmacokinetic Exposure to Fexofenadine is Volume-Dependently Reduced in Healthy Subjects Following Oral Administration With Apple Juice. Clin Transl Sci. 2016 Aug;9(4):201-6. PubMed
  13. Tsiougkos N, Vovolis V. Repeated anaphylactic episodes to orange and apple. Eur Ann Allergy Clin Immunol. 2013 May;45(3):113-5.
  14. Rubido S, García-Caballero L, Abeleira MT, Limeres J, García M, Diz P. Effect of chewing an apple on dental plaque removal and on salivary bacterial viability. PLoS One. 2018;13(7):e0199812. PubMed
  15. Krishnasamy S, Lomer MCE, Marciani L, et al. Processing apples to puree or juice speeds gastric emptying and reduces postprandial intestinal volumes and satiety in healthy adults. J Nutr 2020;150(11):2890-9. PubMed
  16. Awan S, Abelleira A, Khehra L, Hieber R. Undetectable serum lithium concentrations after coadministration of liquid lithium citrate and apple juice: A case report. Ment Health Clin. 2021;11(1):27-30. PubMed

See these in context on the Apple 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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