Major interaction on record — check this product against your medications before combining. Based on 4 of 7 ingredients. Check your meds →
Dietary supplement

Flex-Able Advanced Ingredients & Drug Interactions

by Country Life

Flex-Able Advanced label
See full label image
Capsule Category: Other Combinations
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 Flex-Able Advanced 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

Flex-Able Advanced is a dietary supplement by Country Life with 7 active ingredients. Its ingredients are commonly taken for preventing or treating low potassium (hypokalemia), supporting healthy blood pressure, muscle cramps.Based on those ingredients, 1,060 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Chinese Skullcap extract, Black Catechu extract, Glucosamine Sulfate 2KCl. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Flex-Able Advanced by Country Life

Ask about any prescription or over-the-counter medication and we check it for interactions with Flex-Able Advanced by Country Life — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Flex-Able Advanced by Country Life

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 11, 2026

What’s inside

Partial disclosure
Ingredient Transparency · database check
Partial

Most active ingredients list an amount, but at least one is hidden in a blend or missing.

Why this rating?
  • The label discloses an exact amount for 4 of its 7 active ingredients.
  • “Univestin” is listed as a grouped ingredient — the label gives one combined amount (250 mg) without saying how much of each component you get.
  • “UC-II Standardized Chicken Cartilage” is listed as a grouped ingredient — the label gives one combined amount (40 mg) without saying how much of each component you get.

Flex-Able Advanced contains seven active ingredients. Potassium supports heart rhythm and nerve function.

Glucosamine sulfate is included for joint structure and comfort. Chinese skullcap extract and black catechu extract are herbal ingredients used traditionally in Asian medicine.

Total Collagen and UC-II Standardized Chicken Cartilage supply collagen and cartilage-derived compounds for connective tissue support. The product also contains several inactive ingredients—cellulose, rice bran extract, vegetable glaze, sunflower oil, and silica—which are fillers and binders that help form the capsule.

Does it work?

Strong evidence
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
Strong

Clinical evidence supports at least one of this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: support overall joint health mobility comfort flexibility.
  • We looked for evidence on: Joint pain, Knee pain, Osteoarthritis, Back pain, Exercise-induced muscle soreness, Rheumatoid arthritis (RA) — and 3 related terms.
  • The strongest evidence on file: Glucosamine is rated "Likely Effective" for Osteoarthritis (Natural Medicines).
  • Also on file: Catechu is rated "Insufficient Reliable Evidence To Rate" for Exercise-induced muscle soreness, Osteoarthritis.
  • Also on file: Glucosamine is rated "Insufficient Reliable Evidence To Rate" for Back pain, Rheumatoid arthritis (RA), Joint pain, Knee pain.

For glucosamine sulfate, the evidence shows it is likely effective for osteoarthritis. The evidence isn't established in our data for the other active ingredients in this product.

Chinese skullcap extract has been studied for hay fever, anxiety, atherosclerosis, ADHD, prostate cancer, and headache, but the data we hold rates the evidence as insufficient. Black catechu extract has been studied for exercise-induced muscle soreness and osteoarthritis, but again the evidence is insufficient to rate.

If you're considering this product for a specific condition, talk with your pharmacist about what the current research actually supports.

The evidence, ingredient by ingredient Potassium Baikal Skullcap Catechu Glucosamine

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 4 of the 4 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 4 of 4.
  • General safety write-ups exist for 4 of 4.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Potassium from food is fine, but supplements can raise blood potassium to dangerous levels in some people—especially those with kidney disease. The facts note that potassium is generally well tolerated, though common oral side effects include abdominal pain, belching, diarrhea, flatulence, nausea, and vomiting.

Rare serious effects include irregular heartbeat, heart block, low blood pressure, and confusion. Chinese skullcap extract and black catechu extract have limited human safety data.

Orally, Chinese skullcap is generally well tolerated, though abdominal pain, constipation, diarrhea, nausea, and vomiting have been reported. A specific combination product (Limbrel) containing flavonoids from both extracts was linked to rare reports of severe lung and liver injury, which led to an FDA recall in 2017.

Glucosamine is generally well tolerated; common side effects are bloating, constipation, cramps, diarrhea, heartburn, and nausea. Rare allergic reactions and asthma exacerbations have been reported.

Side effects, ingredient by ingredient Potassium Baikal Skullcap Catechu Glucosamine

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?
  • 4 of the 4 matched ingredients can interact with medications — Catechu, Glucosamine, Potassium, Baikal Skullcap.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; diabetes medications; lithium.
  • For scale: 1,060 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.

Stop and check with your pharmacist if you take warfarin (blood thinner) — glucosamine may increase its effect and bleeding risk. Also double-check before starting if you take potassium-sparing diuretics, ACE inhibitors, or ARBs (blood pressure/heart drugs); potassium in this product could raise your blood potassium dangerously.

If you take any medication metabolized by liver enzymes (CYP2C19 or CYP1A2 substrates), blood thinners, diabetes drugs, estrogens, lithium, theophylline, antithyroid drugs, antihypertensive drugs, or immunosuppressants, run it through the checker on this page before adding this supplement.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glancePartially disclosed formula with clinical evidence supporting its stated purpose. Major medication interactions have been identified, and safety information is well characterized.

This product is aimed at joint and connective tissue support through glucosamine and collagen, with herbal and mineral additions. If you take warfarin, potassium-sparing diuretics, ACE inhibitors, ARBs, blood thinners, diabetes drugs, or lithium, talk with your pharmacist before starting—the interactions here are real and potentially serious.

Pregnant and breastfeeding people should check with their doctor or pharmacist before use, since safety data for most of these ingredients during pregnancy or lactation are limited or advise against it.

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

Assessment coverage: 4 of 7 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated May 22, 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 Flex-Able Advanced, straight from the product label.

Brand Country Life
Barcode (UPC) 015794050407
Net contents 90 Capsule(s)
Market status On market
Date entered into DSLD May 22, 2020
DSLD ID 221173
Product type Other Combinations
Supplement form Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating), Gluten Free, Dairy Free, Sugar 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 Flex-Able Advanced by Country Life, 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:
3 Capsule(s)
Maximum serving Sizes:
3 Capsule(s)
Servings per container
30
UPC/BARCODE
015794050407
IngredientAmount% DV
Calories5 Calorie(s)--
Total Carbohydrates2 Gram(s)1%
Potassium230 mg5%
Maltodextrin0 NP--
Chloride237 mg10%
Univestin250 mg--
Chinese Skullcap extract0 NP--
Black Catechu extract0 NP--
Total Collagen10 mg--
UC-II Standardized Chicken Cartilage40 mg--
Glucosamine Sulfate 2KCl2000 mg--

Other ingredients: Cellulose, Cellulose, Rice Bran extract, Vegetable Glaze, Sunflower Oil, 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

Flex Able Advanced is a specialized complex that contains three clinically studied ingredients to support overall joint health with UC-II brand collagen for increased joint mobility, comfort, and flexibility.

Based on human clinical studies with UC-II collagen.

Three-in-one complex Includes Glucosamine Bioactive undenatured type II collagen

Did you know? Country Life's Flex-Able Advanced contains three clinically studied ingredients! Univestin Patented combination of extracts from two herbal plants that is clinically studied to support joint comfort, as well as neutralize free radicals to support joint health. UC-II Undenatured bioactive type II collagen that is manufactured using a low heat process to preserve the structure. UC-II brand collagen is supported by multiple human clinical trials and numerous patents to support joint comfort, flexibility, and mobility. Glucosamine Glucosamine is a naturally occurring structural component present in connective tissue, synovial fluid, and joints. It is well-known to support healthy joints.

FDA Disclaimer Statement

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

Brand IP Statement(s)

Univestin is a registered US trademark owned by Unigen, Inc. Univestin joint care ingredient is covered by US Patent number US#7674830 and multiple others, all owned by Unigen. UC-II and logo are trademarks of Lonza or its affiliates.

Formulation

Yes Certified gluten-free by gfco.org

No Yeast, wheat or soy No Milk, sugar or preservatives No Artificial colors, flavors or sweeteners No Magnesium stearate No GMOs

This product has been manufactured at a GMP Registered facility.

The ingredients in this specialized complex provides the following benefits: Increased joint mobility Supports overall joint health Increased joint flexibility Increased joint comfort

Increases joint mobility, comfort, and flexibility Supports overall joint health

General Statements

Yes Recyclable packaging Yes Manufacturing supports wind power

Our pledge of integrity Authenticity Cleanliness Freshness Consistency Accuracy

Joint function is an important part of overall health for those that are aging, lead an active lifestyle, and for the joint conscious individual.

10G19NDN

FSC www.fsc.org Mix Paper from responsible sources FSC C101987

Please help us in our mission; recycle this box & bottle after use.

Like/Follow us on our social platforms for new product news, recipes, giveaways and more! Tag us for a chance to be featured. @CountryLifeVitamins

Precautions

Do not accept if seal is broken.

Keep out of the reach of children.

Contains crustacean shellfish (shrimp, crab).

Caution: Not for use by pregnant or nursing women. If you are taking medication, have a medical condition or planning surgery, consult a doctor before using this product.

Do not consume this product if you are allergic to shellfish.

Stop using and consult a doctor if any adverse reactions occur.

Storage

Store in a dry place between 59 degrees-86 degrees F.

Seals/Symbols

Certified B Corporation GF Certified Gluten-free

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

Directions: Adults take three (3) capsules daily or as directed by a health care professional. For best utilization, take between meals. As a reminder, discuss the supplements and medications that you take with your health care providers.

Looking for mineral support?, also try.... Chelated Magensium 250 mg, it helps: Relax muscles Keep bones strong Support a healthy immune system

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

See for yourself

Flex-Able Advanced by Country Life label

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

Flex-Able Advanced 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 Flex-Able Advanced by Country Life

These are the 7 active ingredients this product is made of. Select any to open its full monograph.

Serving size3 Capsule(s) Dosage formCapsule Servings per container30 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.

Potassium

Interacts with
62 drugs
230 mg per serving

Potassium is an essential mineral your body needs for nerve signals, muscle function, and a steady heartbeat, and most people get enough from a balanc...

Potassium monograph & interactions

Chloride

237 mg per serving

Univestin

250 mg per serving

UC-II Standardized Chicken Cartilage

40 mg per serving Form: Collagen
  • › Total Collagen

Glucosamine Sulfate 2KCl

Interacts with
170 drugs
2000 mg per serving Form: Crab, Potassium Chloride, Shrimp

Glucosamine is a natural compound found in cartilage and joint fluid, and it is one of the most popular supplements for osteoarthritis, especially of...

Glucosamine Sulfate 2KCl monograph & interactions

Other (inactive) ingredients: Cellulose, Cellulose, Rice Bran extract, Vegetable Glaze, Sunflower Oil, Silica. These complete the product’s ingredient list but are not active constituents.

Interaction report

Flex-Able Advanced by Country Life Drug Interactions

Want to check YOUR meds against Flex-Able Advanced?

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
1,060Drugs
2 Major 735 Moderate 323 Minor

Ingredients driving the most interactions

Chinese Skullcap extract 946
Black Catechu extract 475
Glucosamine Sulfate 2KCl 170
Potassium 62

Individual Drug Interactions

The ingredients in Flex-Able Advanced interact with 1,060 drugs. Click any drug to see the details.

4 of the 7 ingredients in Flex-Able Advanced interact with drugs. Each result below shows which ingredient is responsible. Chinese Skullcap extract Black Catechu extract Glucosamine Sulfate 2KCl Potassium

Each ingredient & the kinds of drugs it affects

For each ingredient in Flex-Able Advanced with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Chinese Skullcap extract12 drug types · 946 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, Baikal skullcap might increase the risk of bleeding when used concomitantly with anticoagulant and antiplatelet drugs.
Preliminary clinical research suggests that taking capsules containing a combination of astragalus, goldthread, and Baikal skullcap daily for 4 weeks inhibits platelet aggregation; the effect seems to be similar to that of aspirin 50 mg daily. It is unclear if this effect is due to Baikal skullcap, other ingredients, or the combination.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, concomitant use of Baikal skullcap with antidiabetes drugs might enhance blood glucose lowering effects.
Baicalein, a constituent of Baikal skullcap, has alpha-glucosidase inhibitory activity in vitro. Animal research also suggests that Baikal skullcap enhances the antidiabetic effects of metformin. However, in a small human study, taking Baikal skullcap extract did not enhance the antidiabetic effects of metformin, although it did modestly lower glucose levels during an oral glucose tolerance test (OGTT). Until more is known, use cautiously.

Likelihood Possible Evidence B
Antihypertensive Drugs

Theoretically, concomitant use of Baikal skullcap with antihypertensive drugs might have additive effects and increase the risk of hypotension.
Animal research suggests that baicalein, a constituent of Baikal skullcap, might lower blood pressure.

Likelihood Possible Evidence D
Antithyroid Drugs

Theoretically, concomitant use of Baikal skullcap and antithyroid drugs may result in additive activity and increase the risk of hypothyroidism.
In an animal hyperthyroid model, Baikal skullcap improved levels of triiodothyronine (T3), thyroxine (T4), and thyroid stimulating hormone (TSH). The clinical significance of this effect is unclear.

Likelihood Possible Evidence D
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, Baikal skullcap may increase levels of drugs metabolized by CYP1A2 enzymes.
In vitro evidence suggests that constituents of Baikal skullcap inhibit the activity of CYP1A2. This effect has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2C19 (Cyp2C19) Substrates

Theoretically, Baikal skullcap might increase levels of drugs metabolized by CYP2C19 enzymes.
In vitro evidence suggest that wogonin, a constituent of Baikal skullcap, modestly inhibits the activity of CYP2C19 enzymes. This effect has not been reported in humans.

Likelihood Possible Evidence D
Estrogens

Theoretically, concomitant use of large amounts of Baikal skullcap might interfere with hormone replacement therapy, due to competition for estrogen receptors.
In vitro evidence suggests that Baikal skullcap has estrogenic activity.

Likelihood Possible Evidence D
Lithium

Theoretically, Baikal skullcap might reduce lithium excretion and increase serum levels of lithium.
Baikal skullcap is thought to have diuretic properties, which may reduce lithium excretion. The dose of lithium might need to be decreased.

Likelihood Possible Evidence D
Alcohol (Ethanol)

Theoretically, Baikal skullcap might potentiate the sedative effects of alcohol.
In vitro and animal research suggests that Baikal skullcap binds to GABA-A receptors and causes sedation. Theoretically, Baikal skullcap might potentiate the sedative effects of alcohol. Preliminary clinical research has not identified clinically relevant sedation after use of Baikal skullcap; however, a thorough evaluation of safety outcomes has not been conducted.

Likelihood Unlikely Evidence D
Cns Depressants

Theoretically, Baikal skullcap might cause additive therapeutic and adverse effects when used concomitantly with drugs with sedative properties.
In vitro and animal research suggests that Baikal skullcap binds to GABA-A receptors and causes sedation. Theoretically, Baikal skullcap might cause additive therapeutic and adverse effects when used concomitantly with drugs with sedative properties. Preliminary clinical research has not identified clinically relevant sedation after use of Baikal skullcap; however, a thorough evaluation of safety outcomes has not been conducted.

Likelihood Unlikely Evidence D
Organic Anion-Transporting Polypeptide Substrates (Oatp)

Theoretically, Baikal skullcap might alter the levels and clinical effects of OATP substrates.
Some pharmacokinetic research shows that baicalin, a constituent of Baikal skullcap, can decrease plasma levels of rosuvastatin. The mechanism is thought to involve stimulation of the activity of the organic anion-transporting polypeptide 1B1 (OATP1B1), which transports rosuvastatin into the liver. This decreases plasma levels of the drug, but increases levels at the site of action in the liver. The degree to which rosuvastatin levels are affected depends on the OATP1B1 haplotype of the individual. Baikal skullcap might also affect other OATP1B1 substrates.

Likelihood Possible Evidence B
P-Glycoprotein Substrates

Theoretically, Baikal skullcap might increase levels of drugs transported by P-glycoprotein.
In vitro and animal research suggests that baicalein, oroxylin A, and wogonin, constituents of Baikal skullcap, can inhibit P-glycoprotein. This effect has not been reported in humans.

Likelihood Possible Evidence D
Chinese Skullcap extract full monograph & interactions

Black Catechu extract4 drug types · 475 drugs

Antihypertensive Drugs

Theoretically, concomitant use with antihypertensive drugs might increase the risk of hypotension.
Catechu might lower blood pressure.

Likelihood Possible Evidence D
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, black catechu may increase the levels and clinical effects of CYP1A2 substrates.
Animal research shows that black catechu can increase theophylline concentrations in the blood, possibly by inhibiting CYP1A2. Theophylline is a CYP1A2 substrate.

Likelihood Possible Evidence D
Immunosuppressants

Theoretically, catechu might interfere with immunosuppressant therapy.
Animal and in vitro studies suggest that catechu has immunomodulating effects.

Likelihood Possible Evidence D
Theophylline

Theoretically, black catechu may increase the levels and clinical effects of theophylline.
Animal research shows that black catechu can increase theophylline concentrations in the blood, possibly by inhibiting cytochrome P450 1A2.

Likelihood Possible Evidence D
Black Catechu extract full monograph & interactions

Glucosamine Sulfate 2KCl4 drug types · 170 drugs

Warfarin (Coumadin)

Glucosamine might increase the anticoagulant effects of warfarin and increase the risk of bruising and bleeding.
In two individual case reports, glucosamine/chondroitin combinations were associated with a significant increase in international normalized ratio (INR) in patients previously stabilized on warfarin. In one case, the increase in INR occurred only after tripling the dose of a glucosamine/chondroitin supplement from 500 mg/400 mg daily to 1500/1200 mg daily. Additionally, 20 voluntary case reports to the U.S. Food & Drug Administration (FDA) have linked glucosamine plus chondroitin with increased INR, bruising, and bleeding in patients who were also taking warfarin. There have also been 20 additional case reports to the World Health Organization (WHO) that link glucosamine alone to increased INR in patients taking warfarin. The mechanism of this interaction is unclear. Glucosamine is a small component of heparin, but is not thought to have anticoagulant activity; however, animal research suggests that it might have antiplatelet activity.

Likelihood Probable Evidence D
Topoisomerase Ii Inhibitors

Theoretically glucosamine may induce resistance to topoisomerase II inhibitors.
In vitro research suggests that glucosamine might induce resistance to etoposide (VP16, VePesid) and doxorubicin (Adriamycin) by reducing inhibition of topoisomerase II, an enzyme required for DNA replication in tumor cells. This effect has not been reported in humans.

Likelihood Possible Evidence D
Acetaminophen (Tylenol, Others)

Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Anecdotal reports suggest that adding glucosamine to an acetaminophen regimen might decrease pain control in patients with osteoarthritis. Some research suggests that the sulfate portion of glucosamine sulfate might contribute to its effect in osteoarthritis. Since acetaminophen metabolism requires sulfur and reduces serum sulfate concentrations, acetaminophen could theoretically interfere with the action of glucosamine sulfate. Conversely, the administration of sulfate could theoretically decrease the effectiveness of acetaminophen in sulfate-deficient people by increasing its clearance.

Likelihood Possible Evidence B
Antidiabetes Drugs

Despite initial concerns, it is unlikely that glucosamine will interfere with the effects of antidiabetes drugs.
In vitro and animal research has suggested that glucosamine might increase insulin resistance or decrease insulin production. This has raised concerns that taking glucosamine might worsen diabetes and decrease the effectiveness of diabetes drugs. However, clinical research suggests that glucosamine does not have adverse effects on blood glucose or glycated hemoglobin (HbA1C) in healthy, obese, or type 2 diabetes patients.

Likelihood Unlikely Evidence B
Glucosamine Sulfate 2KCl full monograph & interactions

Potassium3 drug types · 62 drugs

Ace Inhibitors (Aceis)

Using ACEIs with high doses of potassium increases the risk of hyperkalemia.
ACEIs block the actions of the renin-angiotensin-aldosterone system and reduce potassium excretion. Concomitant use of these drugs with potassium supplements increases the risk of hyperkalemia. However, concomitant use of these drugs with moderate dietary potassium intake (about 3775-5200 mg daily) does not increase serum potassium levels.

Likelihood Likely Evidence C
Angiotensin Receptor Blockers (Arbs)

Using ARBs with high doses of potassium increases the risk of hyperkalemia.
ARBs block the actions of the renin-angiotensin-aldosterone system and reduce potassium excretion. Concomitant use of these drugs with potassium supplements increases the risk of hyperkalemia. However, concomitant use of these drugs with moderate dietary potassium intake (about 3775-5200 mg daily) does not increase serum potassium levels.

Likelihood Likely Evidence C
Potassium-Sparing Diuretics

Concomitant use increases the risk of hyperkalemia.
Using potassium-sparing diuretics with potassium supplements increases the risk of hyperkalemia.

Likelihood Likely Evidence C
Potassium full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Flex-Able Advanced, from the product label.

Country Life

See all Country Life products
Name
Country Life, LLC
Street Address
180 Vanderbilt Motor Parkway
City
Hauppauge
State
NY
ZipCode
11788
Web Address
CountryLifeVitamins.com
Pharmacist Counseling Corner

Flex-Able Advanced by Country Life: Common Questions

Does Flex-Able Advanced by Country Life interact with any medications?
Yes. Based on its ingredients, Flex-Able Advanced has a known interaction with 1,060 medications, including 2 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Flex-Able Advanced contains 7 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.
Can I take this if I'm pregnant?
Potassium supplements are advised against during pregnancy—stick to dietary potassium and talk with your doctor. Chinese skullcap and black catechu don't have enough safety data and are advised against in pregnancy. Glucosamine also lacks sufficient safety information for pregnancy. There isn't enough data on file for total collagen, maltodextrin, and chloride to say. Check with your doctor or pharmacist for personalized advice.
Is this safe while breastfeeding?
The facts advise checking with your doctor before using potassium supplements while breastfeeding. Chinese skullcap is advised against due to limited safety data. Black catechu is rated likely safe for lactation. Glucosamine lacks enough safety information for breastfeeding. Data on the other ingredients isn't on file. Talk with your pharmacist before starting.
What does glucosamine do?
Glucosamine sulfate is included for joint health and comfort. It's likely effective for osteoarthritis based on the evidence we hold. For other uses like back pain or aging skin, the evidence isn't established in our data.
What are the most common side effects?
From potassium, you might experience abdominal pain, belching, diarrhea, flatulence, nausea, or vomiting. Glucosamine may cause bloating, constipation, cramps, diarrhea, heartburn, or nausea. Chinese skullcap can cause abdominal pain, constipation, diarrhea, nausea, or vomiting. Most people tolerate these ingredients well.
Will this interact with my blood pressure medication?
It depends on the type. If you take an ACE inhibitor or ARB, potassium in this product could combine with your drug to raise blood potassium dangerously. If you take other blood pressure drugs, Chinese skullcap or black catechu could theoretically add to their effect and lower your blood pressure further. Use the medication checker on this page with your exact drug name and dose.
What if I take acetaminophen?
Glucosamine may interfere with acetaminophen's pain-relief effect. If you're using both, talk with your pharmacist about whether this product is the right choice for you.

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

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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.

Flex-Able Advanced label
Go deeper

The Full Monographs Behind Flex-Able Advanced’s Ingredients

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

Herb & supplement monograph

Potassium

Interacts with 62 drugs

Potassium is an essential mineral your body needs for nerve signals, muscle function, and a steady heartbeat, and most people get enough from a balanced diet rich in fruits and vegetables. P...

Read the full Potassium monograph → Herb & supplement monograph

Baikal Skullcap

Interacts with 946 drugs

Baikal skullcap is a traditional Chinese herb (Huang Qin) used for inflammation, allergies, and infections, with active compounds like baicalin and baicalein studied mostly in the lab. Human...

Read the full Baikal Skullcap monograph → Herb & supplement monograph

Catechu

Interacts with 475 drugs

Catechu is an astringent extract made from the heartwood of the Acacia (Senegalia) catechu tree, used traditionally for mouth sores, sore throat, diarrhea, and minor skin problems. Strong hu...

Read the full Catechu monograph → Herb & supplement monograph

Glucosamine

Interacts with 170 drugs

Glucosamine is a natural compound found in cartilage and joint fluid, and it is one of the most popular supplements for osteoarthritis, especially of the knee. The evidence is mixed, with so...

Read the full Glucosamine monograph →
Sources

Sources & How We Checked

Flex-Able Advanced'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 113 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.

Potassium 12 references
  1. McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
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Baikal Skullcap 34 references
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See these in context on the Baikal Skullcap monograph →

Catechu 9 references
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See these in context on the Catechu monograph →

Glucosamine 58 references
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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.

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