Interactions on record — worth a quick check against your medications. Based on 1 of 2 ingredients. Check your meds →
Dietary supplement

Formula 899 Ingredients & Drug Interactions

by DC

Formula 899 label
See full label image
Capsule Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Formula 899 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

Formula 899 is a dietary supplement by DC with 2 active ingredients. Its ingredients are commonly taken for menopausal symptoms, menstrual cramps, hormone balance (popular belief).Based on those ingredients, 41 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Mexican Yam 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 Formula 899 by DC

Ask about any prescription or over-the-counter medication and we check it for interactions with Formula 899 by DC — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Formula 899 by DC

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 Jul 30, 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 2 of its 2 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Formula 899 has 2 active ingredients: adrenal concentrate and Mexican Yam extract (from wild yam root). The adrenal concentrate is a glandular product, and the wild yam extract is included for its traditional role in supporting hormonal balance, though the evidence for that is limited.

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 Wild Yam product and its label doesn't state a use — see Wild Yam'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 wild yam in this product is possibly ineffective for menopausal symptoms. For gallbladder disease, sexual dysfunction, painful periods (dysmenorrhea), and infertility, we don't have enough reliable evidence to say whether it works.

The adrenal concentrate's effectiveness isn't established in the data we hold.

The evidence, ingredient by ingredient Wild Yam

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.

Orally, wild yam is generally well tolerated. Most people experience no problems, but some have reported fever, headache, upset stomach, and vomiting — especially at higher doses.

Anaphylaxis is rare but possible. Safety data for long-term use isn't solid, so we know it's likely fine short-term in healthy adults but can't vouch for years of use.

There isn't enough safety data to recommend this product during pregnancy or while breastfeeding. If you're pregnant, nursing, or planning either, talk with your doctor or pharmacist about whether this is right for you.

Side effects, ingredient by ingredient Wild Yam

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 — Wild Yam.
  • The most serious interaction on file is rated Moderate.
  • For scale: 41 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 any estrogen-based medication or hormone therapy — including birth control pills, hormone replacement therapy, or estrogen patches — you need to check with your doctor or pharmacist before using Formula 899. The wild yam extract could theoretically change how your estrogen works.

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.

This product may appeal to someone looking for traditional hormonal support, but the evidence that wild yam actually works for menopausal symptoms or other conditions is weak or absent. The main concern is its potential to interfere with estrogen-based medications and hormone therapy.

Check your medications first, and if you're on any hormonal drug, clear it 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 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Feb 25, 2021.

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 Formula 899, straight from the product label.

Brand DC
Net contents 90 Capsule(s)
Market status On market
Date entered into DSLD Feb 25, 2021
DSLD ID 245352
Product type Other Combinations
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating), 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 Formula 899 by DC, 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:
1 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
IngredientAmount% DV
Adrenal concentrate100 mg--
Mexican Yam extract300 mg--

Other ingredients: Gelatin, Vegetable Cellulose, Vegetable Magnesium Stearate, Silica

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.
Formula

Guaranteed Maximum Potency: Our Mexican Yam Root Extract is both concentrated and standardized to contain the highest quality, most potent form of Mexican Yam Root extract containing Diosgenin, a DHEA precursor. Diosgenin may act in a way similar to soy isoflavones - as phytoestrogens in the relief of menopausal symptoms. Adrenal Concentrate is added to the formula to enhance the bioavailability of this important herb.

Mexican wild yam root standardized 10:1 concentrate

Precautions

Tamper Evident: Do not use this product if imprinted foil seal under cap is broken or missing.

Keep out of reach of children.

Caution: If you are pregnant or nursing do not take this product.

Storage

Keep tightly closed. Store at room temperature: 59 degrees - 86 degrees F (15 degrees to 30 degrees C).

Formulation

Conforms to USP <2091> for weight. Meets USP <2040> disintegration for maximum bioavailability.

Gluten free

Nutritional support during menopause

FDA Registered Facility (Reg. #1023013) Mfg. under Good Manufacturing Practices (GMPs) Made in USA

FDA Disclaimer Statement

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

Seals/Symbols

Quali Pure

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

Directions: As a dietary supplement, take 1 capsule twice daily, preferably with morning and evening meals.

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

See for yourself

Formula 899 by DC label

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

Formula 899 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 Formula 899 by DC

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Adrenal concentrate

100 mg per serving

Mexican Yam extract

Interacts with
41 drugs
300 mg per serving

Wild yam is a root traditionally used for menopausal symptoms, cramps, and as a so-called 'natural' hormone supplement, but solid human evidence for t...

Mexican Yam extract monograph & interactions

Other (inactive) ingredients: Gelatin, Vegetable Cellulose, Vegetable Magnesium Stearate, Silica. These complete the product’s ingredient list but are not active constituents.

Interaction report

Formula 899 by DC Drug Interactions

Want to check YOUR meds against Formula 899?

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
41Drugs
41 Moderate

Ingredients driving the most interactions

Mexican Yam extract 41

Individual Drug Interactions

The ingredients in Formula 899 interact with 41 drugs. Click any drug to see the details.

1 of the 2 ingredients in Formula 899 interact with drugs. Each result below shows which ingredient is responsible. Mexican Yam extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Formula 899 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.

Mexican Yam extract1 drug type · 41 drugs

Estrogens

Theoretically, wild yam might increase or decrease the effects of estrogen.
Wild yam root shows estrogenic and anti-estrogenic effects in vitro. Theoretically, wild yam might interfere with hormone therapy.

Likelihood Possible Evidence D
Mexican Yam extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Formula 899, from the product label.

DC

See all DC products
Name
Dee Cee Laboratories, Inc.
Street Address
304 Dee Cee Ct.
City
White House
State
TN
ZipCode
37188
Pharmacist Counseling Corner

Formula 899 by DC: Common Questions

Does Formula 899 by DC interact with any medications?
Yes. Based on its ingredients, Formula 899 has a known interaction with 41 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Formula 899 contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is 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.
Does wild yam actually help with menopausal symptoms?
The evidence suggests it doesn't. The data rates it as possibly ineffective for hot flashes and other menopausal symptoms, so if that's why you're considering this product, there isn't much support for it working.
What side effects might I have from the wild yam in this?
Most people tolerate it well, but some experience fever, headache, upset stomach, or vomiting — more likely at higher doses. Very rarely, anaphylaxis (a severe allergic reaction) has occurred.
Is it safe to take this long-term?
We know it's probably okay for short-term use in healthy adults, but long-term safety hasn't been well studied, so we can't promise it's safe if you take it for months or years.
Can I take this while pregnant or breastfeeding?
There isn't enough safety data to recommend it either time. Talk with your doctor or pharmacist for personalized advice before using it.
What is adrenal concentrate, and does it have any interactions?
Adrenal concentrate is a glandular product made from adrenal tissue. We don't have interaction data for it, so we can't tell you whether it interacts with your medications — check with your pharmacist to be sure.

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

Not sure if Formula 899 is safe with your meds?

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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.

Formula 899 label
Go deeper

The Full Monographs Behind Formula 899’s Ingredients

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

Herb & supplement monograph

Wild Yam

Interacts with 41 drugs

Wild yam is a root traditionally used for menopausal symptoms, cramps, and as a so-called 'natural' hormone supplement, but solid human evidence for these uses is lacking. Despite popular cl...

Read the full Wild Yam monograph →
Sources

Sources & How We Checked

Formula 899'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 7 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.

Wild Yam 7 references
  1. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  2. Eagon PK, Elm MS, Hunter DS, et al. Medicinal herbs: modulation of estrogen action. Era of Hope Mtg, Dept Defense; Breast Cancer Res Prog, Atlanta, GA 2000;Jun 8-11.
  3. Cheong JL, Bucknall R. Retinal vein thrombosis associated with a herbal phytoestrogen preparation in a susceptible patient. Postgrad Med J 2005;81:266-7.. PubMed
  4. Rosenberg Zand, R. S., Jenkins, D. J., and Diamandis, E. P. Effects of natural products and nutraceuticals on steroid hormone-regulated gene expression. Clin Chim.Acta 2001;312(1-2):213-219. PubMed
  5. Araghiniknam M, Chung S, Nelson-White T, and et al. Antioxidant activity of Dioscorea and dehydroepiandrosterone (DHEA) in older humans. Life Sciences 1996;59:L147-L157.
  6. Zeng M, Zhang L, Li M, et al. Estrogenic effects of the extracts from the Chinese Yam (Dioscorea opposite Thunb.) and its effective compounds in vitro and in vivo. Molecules. 2018 Jan 23;23(2). Pii: E11. PubMed
  7. Lu J, Wong RN, Zhang L, et al. Comparative analysis of proteins with stimulating activity on ovarian estradiol biosynthesis from four different Dioscorea species in vitro using both phenotypic and target-based approaches: implication for treating menopaus

See these in context on the Wild Yam 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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