Potassium 99 mg Ingredients & Drug Interactions
by Source Naturals
What is this page for?
First and foremost: checking Potassium 99 mg 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
Potassium 99 mg is a dietary supplement by Source Naturals with 2 active ingredients. Its ingredients are commonly taken for preventing or treating low potassium (hypokalemia), supporting healthy blood pressure, muscle cramps.Based on those ingredients, 207 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Calcium, Potassium. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Potassium 99 mg by Source Naturals
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HelloPharmacist Scorecard of Potassium 99 mg by Source Naturals
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.
What’s inside
Full disclosure
This product contains 2 active ingredients: potassium and calcium. Potassium is an electrolyte your body needs to maintain proper nerve and muscle function, and the inactive ingredients are dibasic calcium phosphate, stearic acid, modified cellulose gum, silica, and magnesium stearate, which help form and stabilize the tablet.
Does it work?
Strong evidence
Calcium in this product is effective for kidney failure, dyspepsia (indigestion), low blood calcium (hypocalcemia), and high potassium levels (hyperkalemia), and is likely effective for osteoporosis. The product facts we hold don't include effectiveness data for potassium as a standalone supplement beyond its use in managing elevated potassium levels.
How safe is it?
Well-documented data
Both potassium and calcium are generally well-tolerated when taken at recommended amounts. Potassium from food is fine, but supplements can cause dangerously high blood levels in some people—especially those with kidney disease—so use them only under medical guidance.
Common side effects of potassium include abdominal pain, belching, diarrhea, nausea, and vomiting. Rare but serious effects include heart arrhythmias, heart block, low blood pressure, and mental confusion from very high potassium levels.
Calcium is also well-tolerated at recommended doses; common side effects are belching, constipation, diarrhea, and stomach upset. For pregnancy, potassium from a normal diet is fine, but use supplements only under your doctor's guidance; calcium is likely safe at recommended amounts during pregnancy.
For breastfeeding, dietary potassium is appropriate, but check with your doctor before using potassium supplements; calcium can be met through recommended amounts during breastfeeding.
Meds to double-check
Major interaction found
Before taking this supplement, double-check with your doctor or pharmacist if you're on any HIV integrase inhibitor (dolutegravir, elvitegravir, or raltegravir), any blood pressure medication including ACE inhibitors, ARBs, or potassium-sparing diuretics, intravenous ceftriaxone, levothyroxine (thyroid medication), sotalol, or calcipotriene. These are the medication types where documented interactions exist.
The bottom line
Scorecard at a glanceFully disclosed formula with clinical evidence supporting its stated purpose. Major medication interactions have been identified, and safety information is well characterized.
If you have kidney disease or take blood pressure medications (ACE inhibitors, ARBs, or potassium-sparing diuretics), HIV drugs, thyroid medication, or certain antibiotics, this product needs a conversation with your own doctor or pharmacist first. Even at 99 mg, potassium supplements carry real risks in the wrong setting.
Calcium itself is generally well-tolerated but can interfere with how several common drugs work.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Sep 22, 2022.
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
General information
Key facts about Potassium 99 mg, straight from the product label.
| Brand | Source Naturals |
|---|---|
| Barcode (UPC) | 021078003212 |
| Net contents | 250 Tablet(s) |
| Market status | On market |
| Date entered into DSLD | Sep 22, 2022 |
| DSLD ID | 275065 |
| Product type | Mineral |
| Supplement form | Tablet Or Pill |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar Free |
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 Potassium 99 mg by Source Naturals, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Potassium | 99 mg | 2% |
| Calcium | 178 mg | 13% |
Other ingredients: Dibasic Calcium Phosphate, Stearic Acid, modified Cellulose Gum, Silica, Magnesium Stearate
Tap any ingredient to jump to its full detail below.
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.
FDA Statement of Identity
Dietary Supplement
Formula
Amino acid chelate
Potassium is essential for nerve function, muscle strength, glycogen formation, and the regulation of heart action and blood pressure. The typical American high-sodium diet tends to deplete potassium. This potassium is specially bonded (chelated) with amino acids to enhance assimilation.
Precautions
Contains soy.
Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.
Do not use if either tamper-evident seal is broken or missing.
Keep out of the reach of children.
Suggested/Recommended/Usage/Directions
Suggested Use: 1 tablet daily.
Formulation
Contains no yeast, dairy, egg, gluten, corn or wheat. Contains no sugar, preservatives, or artificial color, flavor or fragrance.
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)
Copyright SOURCE NATURALS, INC.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Potassium 99 mg by Source Naturals label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
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)The Ingredients in Potassium 99 mg by Source Naturals
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Tablet(s) Dosage formTablet Or Pill Servings per container250 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 with62 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 balanc...
Potassium monograph & interactionsCalcium
Interacts with168 drugs
Calcium is an essential mineral your body needs for strong bones, nerve signaling, and muscle function, and supplements can help fill gaps when diet f...
Calcium monograph & interactionsOther (inactive) ingredients: Dibasic Calcium Phosphate, Stearic Acid, Modified Cellulose Gum, Silica, Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.
Potassium 99 mg by Source Naturals Drug Interactions
HelloPharmacist Interaction Report
Potassium 99 mg by Source Naturals interacts with several medications through its potassium and calcium content.
The most serious interaction is calcium's Major-severity effect on dolutegravir (Tivicay) and elvitegravir (Vitekta), HIV integrase inhibitors where calcium can reduce drug levels by a significant amount—potentially lowering their effectiveness. Calcium also carries a Major interaction with the antibiotic ceftriaxone (Rocephin) when given intravenously, where the two can form a dangerous precipitate in the lungs and kidneys.
Read the full breakdown — every affected drug type, severity by severity
Potassium itself poses Moderate-severity risks with three major blood pressure medication classes: potassium-sparing diuretics, ACE inhibitors (ACEIs), and angiotensin receptor blockers (ARBs). All three increase your risk of high potassium levels (hyperkalemia) when combined with potassium supplements.
Calcium carries additional Moderate interactions with the HIV drug raltegravir (Isentress), the thyroid medication levothyroxine (Synthroid), the heart rhythm drug sotalol (Betapace), the psoriasis treatment calcipotriene (Dovonex), and the calcium channel blocker diltiazem (Cardizem)—most by reducing how well your body absorbs or uses the medication.
Altogether, these interactions span 207 individual medications. If you take any of these drugs or any blood pressure, heart, HIV, thyroid, or antibiotic medication, run your exact prescriptions through the interaction checker below before starting this supplement.
Check your own medications below · Editorial policy · How we use AI
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Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Potassium 99 mg interact with 207 drugs. Click any drug to see the details.
2 of the 2 ingredients in Potassium 99 mg interact with drugs. Each result below shows which ingredient is responsible. Calcium Potassium
CeftriaxoneRocephin
How Ceftriaxone interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumCeftriaxone (rocephin) Major
Interaction Summary
Co-administration of intravenous calcium and ceftriaxone can result in precipitation of a ceftriaxone-calcium salt in the lungs and kidneys.
Read the full Calcium + Ceftriaxone interactionCobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide FumarateGenvoya
How Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumElvitegravir (vitekta), Bictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Major
Interaction Summary
Calcium seems to reduce levels of elvitegravir.
Read the full Calcium + Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interactionDolutegravirTivicay
How Dolutegravir interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumDolutegravir (tivicay) Major
Interaction Summary
Calcium seems to reduce levels of dolutegravir.
Read the full Calcium + Dolutegravir interactionDolutegravir, Emtricitabine, Tenofovir AlafenamideDolutegravir, Emtricitabine, Tenofovir Alafenamide
How Dolutegravir, Emtricitabine, Tenofovir Alafenamide interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumDolutegravir (tivicay), Bictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Major
Interaction Summary
Calcium seems to reduce levels of dolutegravir.
Read the full Calcium + Dolutegravir, Emtricitabine, Tenofovir Alafenamide interactionDolutegravir, RilpivirineJuluca
How Dolutegravir, Rilpivirine interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumDolutegravir (tivicay) Major
Interaction Summary
Calcium seems to reduce levels of dolutegravir.
Read the full Calcium + Dolutegravir, Rilpivirine interactionElvitegravirVitekta
How Elvitegravir interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumElvitegravir (vitekta) Major
Interaction Summary
Calcium seems to reduce levels of elvitegravir.
Read the full Calcium + Elvitegravir interactionElvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil FumarateStribild
How Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumElvitegravir (vitekta), Bictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Major
Interaction Summary
Calcium seems to reduce levels of elvitegravir.
Read the full Calcium + Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interactionAlendronateBinosto, Fosamax
How Alendronate interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumBisphosphonates Moderate
Interaction Summary
Calcium reduces the absorption of bisphosphonates.
Read the full Calcium + Alendronate interactionAlendronate Sodium
How Alendronate Sodium interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumBisphosphonates Moderate
Interaction Summary
Calcium reduces the absorption of bisphosphonates.
Read the full Calcium + Alendronate Sodium interactionAlendronate Sodium, CholecalciferolFosamax Plus D
How Alendronate Sodium, Cholecalciferol interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumBisphosphonates Moderate
Interaction Summary
Calcium reduces the absorption of bisphosphonates.
Read the full Calcium + Alendronate Sodium, Cholecalciferol interactionAlginic Acid, Aluminum HydroxideRafton
How Alginic Acid, Aluminum Hydroxide interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Alginic Acid, Aluminum Hydroxide interactionAluminum Acetate, Benzethonium ChlorideBuro-Sol Otic Solution
How Aluminum Acetate, Benzethonium Chloride interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aluminum Acetate, Benzethonium Chloride interactionAluminum ChlorideAluminum Chloride, Anhydrol Forte, Driclor, Drysol
How Aluminum Chloride interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aluminum Chloride interactionAluminum HydroxideAlu-Cap, Amphojel, Gaviscon
How Aluminum Hydroxide interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aluminum Hydroxide interactionAluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #2
How Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interactionAluminum Hydroxide, Aspirin, Magnesium HydroxideAscriptin
How Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interactionAluminum Hydroxide, Magnesium Hydroxide (otc Drug)Maalox, Mucogel
How Aluminum Hydroxide, Magnesium Hydroxide (otc Drug) interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aluminum Hydroxide, Magnesium Hydroxide (otc Drug) interactionAluminum Hydroxide, Magnesium Hydroxide, Simethicone (otc Drug)Mylanta
How Aluminum Hydroxide, Magnesium Hydroxide, Simethicone (otc Drug) interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aluminum Hydroxide, Magnesium Hydroxide, Simethicone (otc Drug) interactionAluminum, CalciumDomeboro
How Aluminum, Calcium interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aluminum, Calcium interactionAluminum, Magnesium (otc Drug)Almagel
How Aluminum, Magnesium (otc Drug) interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aluminum, Magnesium (otc Drug) interactionAluminum, Magnesium Hydroxide (otc Drug)Wingel
How Aluminum, Magnesium Hydroxide (otc Drug) interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aluminum, Magnesium Hydroxide (otc Drug) interactionAmilorideAmilamont, Midamor
How Amiloride interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
PotassiumPotassium-sparing Diuretics Moderate
Interaction Summary
Concomitant use increases the risk of hyperkalemia.
Read the full Potassium + Amiloride interactionAmiloride, HydrochlorothiazideAmil-Co, Amilzide, Moduret 25, Moduretic
How Amiloride, Hydrochlorothiazide interacts with Potassium 99 mg — through 2 ingredients. Tap an ingredient for the detail:
CalciumThiazide Diuretics Moderate
Interaction Summary
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Read the full Calcium + Amiloride, Hydrochlorothiazide interactionPotassiumPotassium-sparing Diuretics Moderate
Interaction Summary
Concomitant use increases the risk of hyperkalemia.
Read the full Potassium + Amiloride, Hydrochlorothiazide interactionAmlodipine Besylate, BenazeprilLotrel
How Amlodipine Besylate, Benazepril interacts with Potassium 99 mg — through 2 ingredients. Tap an ingredient for the detail:
PotassiumAce Inhibitors (aceis) Moderate
Interaction Summary
Using ACEIs with high doses of potassium increases the risk of hyperkalemia.
Read the full Potassium + Amlodipine Besylate, Benazepril interactionCalciumCalcium Channel Blockers Minor
Interaction Summary
Intravenous calcium may decrease the effects of calcium channel blockers; oral calcium is unlikely to have this effect.
Read the full Calcium + Amlodipine Besylate, Benazepril interactionAmphotericin, TetracyclineMysteclin-F
How Amphotericin, Tetracycline interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumTetracycline Antibiotics Moderate
Interaction Summary
Calcium seems to reduce the absorption of tetracycline antibiotics.
Read the full Calcium + Amphotericin, Tetracycline interactionAspirin, Aluminum Hydroxide, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #3
How Aspirin, Aluminum Hydroxide, Codeine Phosphate, Magnesium Hydroxide interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumAluminum Moderate
Interaction Summary
Calcium citrate might increase aluminum absorption and toxicity.
Read the full Calcium + Aspirin, Aluminum Hydroxide, Codeine Phosphate, Magnesium Hydroxide interactionAtenolol, ChlortalidoneAtenixCo, Tenoret 50, Totaretic
How Atenolol, Chlortalidone interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumThiazide Diuretics Moderate
Interaction Summary
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Read the full Calcium + Atenolol, Chlortalidone interactionAtenolol, ChlorthalidoneTenoretic
How Atenolol, Chlorthalidone interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
CalciumThiazide Diuretics Moderate
Interaction Summary
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Read the full Calcium + Atenolol, Chlorthalidone interactionAzilsartanEdarbi
How Azilsartan interacts with Potassium 99 mg — through 1 ingredient. Tap an ingredient for the detail:
PotassiumAngiotensin Receptor Blockers (arbs) Moderate
Interaction Summary
Using ARBs with high doses of potassium increases the risk of hyperkalemia.
Read the full Potassium + Azilsartan interactionAzilsartan, ChlorthalidoneEdarbyclor
How Azilsartan, Chlorthalidone interacts with Potassium 99 mg — through 2 ingredients. Tap an ingredient for the detail:
PotassiumAngiotensin Receptor Blockers (arbs) Moderate
Interaction Summary
Using ARBs with high doses of potassium increases the risk of hyperkalemia.
Read the full Potassium + Azilsartan, Chlorthalidone interactionCalciumThiazide Diuretics Moderate
Interaction Summary
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Read the full Calcium + Azilsartan, Chlorthalidone interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Potassium 99 mg 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.
Calcium
Ceftriaxone (Rocephin)
Co-administration of intravenous calcium and ceftriaxone can result in precipitation of a ceftriaxone-calcium salt in the lungs and kidneys.
Avoid administering intravenous calcium in any form, such as parenteral nutrition or Lactated Ringers, within 48 hours of intravenous ceftriaxone. Case reports in neonates show that administering intravenous ceftriaxone and calcium can result in precipitation of a ceftriaxone-calcium salt in the lungs and kidneys. In several cases, neonates have died as a result of this interaction. So far there are no reports in adults; however, there is still concern that this interaction might occur in adults.
Dolutegravir (Tivicay)
Calcium seems to reduce levels of dolutegravir.
Advise patients to take dolutegravir either 2 hours before or 6 hours after taking calcium supplements. Pharmacokinetic research suggests that taking calcium carbonate 1200 mg concomitantly with dolutegravir 50 mg reduces plasma levels of dolutegravir by almost 40%. Calcium appears to decrease levels of dolutegravir through chelation.
Elvitegravir (Vitekta)
Calcium seems to reduce levels of elvitegravir.
Advise patients to take elvitegravir either 2 hours before or 2 hours after taking calcium supplements. Pharmacokinetic research suggests that taking calcium along with elvitegravir can reduce blood levels of elvitegravir through chelation.
Aluminum
Calcium citrate might increase aluminum absorption and toxicity. Other types of calcium do not increase aluminum absorption.
Calcium citrate can increase the absorption of aluminum when taken with aluminum hydroxide. The increase in aluminum levels may become toxic, particularly in individuals with kidney disease. However, the effect of calcium citrate on aluminum absorption is due to the citrate anion rather than calcium cation. Calcium acetate does not appear to increase aluminum absorption.
Bictegravir/Emtricitabine/Tenofovir Alafenamide (Biktarvy)
Calcium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption when taken in a fasting state.
Advise patients that bictegravir/emtricitabine/tenofovir alafenamide and calcium can be taken together if taken with food. However, if taken on an empty stomach, bictegravir/emtricitabine/tenofovir alafenamide should not be taken with, or 2 hours after, calcium containing products.
Bisphosphonates
Calcium reduces the absorption of bisphosphonates.
Advise patients to take bisphosphonates at least 30 minutes before calcium, but preferably at a different time of day. Calcium supplements decrease absorption of bisphosphonates.
Calcipotriene (Dovonex)
Taking calcipotriene with calcium might increase the risk for hypercalcemia.
Calcipotriene is a vitamin D analog used topically for psoriasis. It can be absorbed in sufficient amounts to cause systemic effects, including hypercalcemia. Theoretically, combining calcipotriene with calcium supplements might increase the risk of hypercalcemia.
Digoxin (Lanoxin)
Using intravenous calcium with digoxin might increase the risk of fatal cardiac arrhythmias.
Hypercalcemia increases the risk of fatal cardiac arrhythmias with digoxin. However, one retrospective analysis of clinical data suggests that intravenous calcium does not increase the risk of dysrhythmias or mortality in patients receiving digoxin.
Diltiazem (Cardizem, Others)
Theoretically, calcium may reduce the therapeutic effects of diltiazem.
Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically, calcium might increase this risk of hypercalcemia and reduce the effectiveness of diltiazem.
Levothyroxine (Synthroid, Others)
Calcium seems to reduce the absorption and effectiveness of levothyroxine.
Advise patients to take levothyroxine and calcium supplements at least 4 hours apart. Calcium reduces levothyroxine absorption, probably by forming insoluble complexes. Calcium carbonate supplements reduce effectiveness of levothyroxine in patients with hypothyroidism.
Lithium
Theoretically, concomitant use of calcium and lithium may increase this risk of hypercalcemia.
Clinical research suggests that long-term use of lithium may cause hypercalcemia in 10% to 60% of patients. Theoretically, concomitant use of lithium and calcium supplements may further increase this risk.
Quinolone Antibiotics
Calcium seems to reduce the absorption of quinolone antibiotics.
Advise patients to take oral quinolones at least 2 hours before or 4-6 hours after calcium supplements or calcium-fortified foods. Taking calcium at the same time as oral quinolones can reduce quinolone absorption. Calcium binds to quinolones in the gut.
Raltegravir (Isentress)
Calcium may reduce levels of raltegravir.
Pharmacokinetic research shows that taking a single dose of calcium carbonate 3000 mg along with raltegravir 400 mg twice daily modestly decreases the mean area under the curve of raltegravir, but the decrease does not necessitate a dose adjustment of raltegravir. However, a case of elevated HIV-1 RNA levels and documented resistance to raltegravir has been reported for a patient taking calcium carbonate 1 gram three times daily plus vitamin D3 (cholecalciferol) 400 IU three times daily in combination with raltegravir 400 mg twice daily for 11 months. It is thought that calcium reduced raltegravir levels by chelation, leading to treatment failure.
Sotalol (Betapace)
Calcium seems to reduce the absorption of sotalol.
Advise patients to separate doses by at least 2 hours before or 4-6 hours after calcium. Calcium appears to reduce the absorption of sotalol, probably by forming insoluble complexes.
Tetracycline Antibiotics
Calcium seems to reduce the absorption of tetracycline antibiotics.
Advise patients to take oral tetracyclines at least 2 hours before, or 4-6 hours after calcium supplements. Taking calcium at the same time as oral tetracyclines can reduce tetracycline absorption. Calcium binds to tetracyclines in the gut.
Thiazide Diuretics
Taking calcium along with thiazides might increase the risk of hypercalcemia and renal failure.
Thiazides reduce calcium excretion by the kidneys. Using thiazides along with moderately large amounts of calcium carbonate increases the risk of milk-alkali syndrome (hypercalcemia, metabolic alkalosis, renal failure). Patients may need to have their serum calcium levels and/or parathyroid function monitored regularly.
Verapamil (Calan, Others)
Theoretically, calcium may reduce the therapeutic effects of verapamil.
Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically, use of calcium supplements may increase this risk of hypercalcemia and reduce the effectiveness of verapamil.
Calcium Channel Blockers
Intravenous calcium may decrease the effects of calcium channel blockers; oral calcium is unlikely to have this effect.
Intravenous calcium is used to decrease the effects of calcium channel blockers in the management of overdose. Intravenous calcium gluconate has been used before intravenous verapamil (Isoptin) to prevent or reduce the hypotensive effects without affecting the antiarrhythmic effects. But there is no evidence that dietary or supplemental calcium when taken orally interacts with calcium channel blockers.
Potassium
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.
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.
Potassium-Sparing Diuretics
Concomitant use increases the risk of hyperkalemia.
Using potassium-sparing diuretics with potassium supplements increases the risk of hyperkalemia.
Brand information
Manufacturer and brand details for Potassium 99 mg, from the product label.
Source Naturals
- Name
- Source Naturals, Inc.
- Street Address
- P. O. Box 2118
- City
- Santa Cruz
- State
- CA
- ZipCode
- 95062
- Web Address
- www.sourcenaturals.com
Potassium 99 mg by Source Naturals: Common Questions
Does Potassium 99 mg by Source Naturals interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take this if I have kidney disease?
What are the most common side effects?
Is this safe to take during pregnancy?
Can I take this while breastfeeding?
What is potassium used for in the body?
What is calcium used for in this product?
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The Full Monographs Behind Potassium 99 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Potassium
Interacts with 62 drugsPotassium 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 monographCalcium
Interacts with 168 drugsCalcium is an essential mineral your body needs for strong bones, nerve signaling, and muscle function, and supplements can help fill gaps when diet falls short. Most people do best getting...
Read the full Calcium monograph →Sources & How We Checked
Potassium 99 mg'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.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
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 74 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
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- Phillips, C. O., Kashani, A., Ko, D. K., Francis, G., and Krumholz, H. M. Adverse effects of combination angiotensin II receptor blockers plus angiotensin-converting enzyme inhibitors for left ventricular dysfunction: a quantitative review of data from ra DOI
- Altieri, P. I., Herrero, C., Suero, R., and Ortiz, A. Bleeding duodenal ulcer in a patient taking slow-releasing potassium tablets. Bol.Asoc.Med P.R. 1977;69(8):276.
- Raf, L. E. Enteric-coated potassium chloride tablets and ulcer of the small intestine. Acta Chir Scand Suppl 1967;(374):1-87.
- Potassium chloride oral solution [package insert]. Allentown, PA: Lehigh Valley Technologies, Inc.; 2014.
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Calcium 62 references
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- Rocephin (ceftriaxone) and calcium interaction. Pharmacist's Letter / Prescriber's Letter 2007;23(10):231005.
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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