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

Saw Palmetto Ingredients & Drug Interactions

by Bronson Laboratories

Saw Palmetto label
See full label image
Capsule Category: Botanical With Nutrients
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 Saw Palmetto 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

Saw Palmetto is a dietary supplement by Bronson Laboratories with 5 active ingredients. Its ingredients are commonly taken for bone health and osteoporosis prevention, dietary calcium deficiency, heartburn relief (calcium carbonate antacids).Based on those ingredients, 996 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Uva Ursi, Saw Palmetto berry extract, Calcium. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Saw Palmetto by Bronson Laboratories

Ask about any prescription or over-the-counter medication and we check it for interactions with Saw Palmetto by Bronson Laboratories — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Saw Palmetto by Bronson Laboratories

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 10, 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 5 of its 5 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

This supplement contains 5 active ingredients. Calcium supports bone health and is used for low blood sugar (hypoglycemia) and high potassium (hyperkalemia).

Uva ursi is a traditional urinary tract herb. Pygeum africanum bark is used for prostate health.

Saw palmetto berry extract is the classic herb for benign prostate enlargement and urinary symptoms. Pumpkin seed extract is also used for prostate and bladder function.

The product also contains several inactive ingredients—gelatin, dicalcium phosphate, microcrystalline cellulose, magnesium stearate, and silicon dioxide—which are excipients used to form and stabilize 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: prostate health support.
  • We looked for evidence on: Benign prostatic hyperplasia (BPH), Chronic prostatitis and chronic pelvic pain syndrome (CP/CPPS), Non-neurogenic lower urinary tract symptoms (LUTS), Overactive bladder, Prostatitis, urinary symptoms — and 2 related terms.
  • The strongest evidence on file: Pygeum is rated "Likely Effective" for Benign prostatic hyperplasia (BPH) (Natural Medicines).
  • Also on file: Pumpkin is rated "Possibly Effective" for Benign prostatic hyperplasia (BPH).
  • Also on file: Saw Palmetto is rated "Possibly Ineffective" for Benign prostatic hyperplasia (BPH).

Calcium is effective for kidney failure, dyspepsia (indigestion), low blood calcium, high potassium, and likely effective for osteoporosis. Saw palmetto berry extract is possibly ineffective for benign prostate enlargement and possibly effective for a specific urological procedure (TURP).

Uva ursi shows insufficient reliable evidence for its traditional use in urinary tract infections and other urological conditions; in fact, it is rated possibly ineffective for UTIs. Pygeum is likely effective for benign prostate enlargement.

Pumpkin seed extract is possibly effective for benign prostate enlargement. Evidence for the other claimed uses—such as androgenic alopecia (hair loss), bronchitis, or interstitial cystitis—is insufficient or not established in our data.

The evidence, ingredient by ingredient Calcium Uva Ursi Pygeum Saw Palmetto Pumpkin

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 5 of the 5 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 5 of 5.
  • General safety write-ups exist for 5 of 5.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Calcium is generally well tolerated at recommended doses, but very high intakes raise concerns: epidemiological evidence suggests daily intake over 1500–2000 mg may increase the risk of advanced prostate cancer and cardiovascular events, though these findings are debated. The most common side effects are belching, constipation, diarrhea, and stomach upset.

Uva ursi must be used short-term only; at high doses (20 grams or more) it can cause serious effects including collapse, convulsions, shortness of breath, and delirium, and 30 grams or more may be fatal. Common side effects are nausea, vomiting, diarrhea, and stomach upset.

Pygeum is generally well tolerated but quality and long-term safety data are limited; nausea and abdominal pain have been reported but occurred at rates similar to placebo. Saw palmetto is well tolerated with mild, reversible side effects—nausea, diarrhea, constipation, dizziness, fatigue, headache, abdominal pain, and decreased libido are the most common; rare cases of cardiac problems and a fixed drug eruption have been reported.

Pumpkin seed extract is generally well tolerated; common side effects are abdominal discomfort, diarrhea, nausea, and vomiting; rare anaphylaxis and hair loss linked to high cucurbitacin content have been reported.

Side effects, ingredient by ingredient Calcium Uva Ursi Pygeum Saw Palmetto Pumpkin

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 5 matched ingredients can interact with medications — Uva Ursi, Calcium, Pumpkin, Saw Palmetto.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; heart-rhythm medications; lithium.
  • For scale: 997 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.

Check before starting if you take HIV integrase inhibitors (dolutegravir or elvitegravir), any antibiotic given intravenously, thyroid medication (levothyroxine), heart rhythm drugs (raltegravir, diltiazem, sotalol), blood thinners or antiplatelet drugs, birth control pills or hormone therapy, or lithium. The calcium in this product can significantly reduce how well some of these work or create dangerous interactions.

Uva ursi and pumpkin seed extract may also affect lithium levels, and saw palmetto may increase bleeding risk.

Check your own medication Run your meds through the checker above

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.

This is a multingredient prostate supplement containing herbs and minerals. It may be considered if you have benign prostate enlargement or related urinary symptoms, though the evidence for saw palmetto itself is weak.

The calcium content, however, creates significant risks if you take HIV medications, thyroid drugs, certain antibiotics, or heart medications. If you're on any prescriptions—especially for HIV, thyroid, blood thinning, or heart rhythm—talk with your doctor or pharmacist before starting, and use the medication checker on this page.

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

Assessment coverage: 5 of 5 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jun 1, 2012.

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 Saw Palmetto, straight from the product label.

Brand Bronson Laboratories
Barcode (UPC) 716563412012
Net contents 100 Capsule(s)
Market status On market
Date entered into DSLD Jun 1, 2012
DSLD ID 8555
Product type Botanical With Nutrients
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult Male (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 Saw Palmetto by Bronson Laboratories, 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:
2 Capsule(s)
Maximum serving Sizes:
2 Capsule(s)
UPC/BARCODE
716563412012
IngredientAmount% DV
Calcium166 mg16%
Uva Ursi10 mg--
Pygeum africanum Bark20 mg--
Saw Palmetto berry extract54 mg--
Pumpkin Seed Extract13.4 mg--

Other ingredients: Gelatin, Dicalcium Phosphate, Microcrystalline Cellulose, Magnesium Stearate, Silicon Dioxide

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.
General Statements

Supports prostate health HERBAL SUPPORT EST 1960

Made in USA

Suggested/Recommended/Usage/Directions

Directions: As a dietary supplement for adults, 2 capsules daily or as directed by a health professional.

Precautions

Consult a healthcare professional before taking this product if you are taking any medication or planning a medical procedure.

WARNING: Consult healthcare professional before taking this product if you are taking any medication or planning a medical procedure.

Keep out of reach of children.

FDA Statement of Identity

Dietary Supplement

Brand IP Statement(s)

Discover the Bronson Difference™

Storage

Store at room temperature. Protect from light.

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.

General

412a REF 1111

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

See for yourself

Saw Palmetto by Bronson Laboratories label

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

Saw Palmetto 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 Saw Palmetto by Bronson Laboratories

These are the 5 active ingredients this product is made of. Select any to open its full monograph.

Serving size2 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.

Calcium

Interacts with
168 drugs
166 mg per serving Form: Dicalcium Phosphate

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 & interactions

Uva Ursi

Interacts with
803 drugs
10 mg per serving

Uva ursi is a traditional herb used mainly for urinary tract infections, and its leaves contain a compound called arbutin that may have antimicrobial...

Uva Ursi monograph & interactions

Pygeum africanum Bark

No known
interactions
20 mg per serving

Pygeum is an extract from the bark of the African cherry tree that is most often used to ease urinary symptoms linked to an enlarged prostate. Some st...

Pygeum africanum Bark monograph & interactions

Saw Palmetto berry extract

Interacts with
174 drugs
54 mg per serving Form: Fatty Acids

Saw palmetto is a plant extract most often used for urinary symptoms linked to an enlarged prostate (BPH). The best research suggests it works no bett...

Saw Palmetto berry extract monograph & interactions

Pumpkin Seed Extract

Interacts with
1 drug
13.4 mg per serving Form: Fatty Acids

Pumpkin is a nutritious squash, and its seeds and seed oil are the parts most often used as supplements, mainly for urinary and prostate symptoms. The...

Pumpkin Seed Extract monograph & interactions

Other (inactive) ingredients: Gelatin, Dicalcium Phosphate, Microcrystalline Cellulose, Magnesium Stearate, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.

Interaction report

Saw Palmetto by Bronson Laboratories Drug Interactions

Want to check YOUR meds against Saw Palmetto?

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
996Drugs
7 Major 944 Moderate 45 Minor

Ingredients driving the most interactions

Uva Ursi 803
Saw Palmetto berry extract 174
Calcium 168
Pumpkin Seed Extract 1

Individual Drug Interactions

The ingredients in Saw Palmetto interact with 996 drugs. Click any drug to see the details.

4 of the 5 ingredients in Saw Palmetto interact with drugs. Each result below shows which ingredient is responsible. Uva Ursi Saw Palmetto berry extract Calcium Pumpkin Seed Extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Saw Palmetto 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.

Uva Ursi6 drug types · 803 drugs

Cytochrome P450 2C19 (Cyp2C19) Substrates

Theoretically, uva ursi may decrease the metabolism of CYP2C19 substrates.
In vitro, uva ursi appears to inhibit cytochrome CYP2C19. This effect has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, uva ursi may decrease the metabolism of CYP3A4 substrates.
In vitro, uva ursi appears to inhibit CYP3A4. This effect has not been reported in humans.

Likelihood Possible Evidence D
Glucuronidated Drugs

Theoretically, uva ursi may increase levels of drugs metabolized by glucuronidation.
In vitro, uva ursi extract appears to strongly inhibit UDP-glucuronosyltransferase (UGT) 1A1 (UGT1A1). However, uva ursi extract does not appear to inhibit UGT1A1 in animal models. This effect has not been reported in humans.

Likelihood Possible Evidence D
Lithium

Theoretically, uva ursi may increase lithium levels, necessitating a decrease in dose.
Uva ursi may have diuretic properties. Diuretics may increase lithium reabsorption with sodium in the proximal tubule of the kidney. Theoretically, uva ursi might reduce excretion and increase levels of lithium.

Likelihood Probable Evidence D
Urinary Acidifying Agents

Effects of uva ursi in the urinary tract may be reduced by urinary acidifying agents.
Uva ursi seems to work best in alkaline urine. Theoretically, taking uva ursi with medications known to acidify the urine may decrease any effects of uva ursi on the urinary tract.

Likelihood Possible Evidence D
P-Glycoprotein Substrates

Theoretically, uva ursi may alter the levels of drugs transported by P-glycoprotein.
In vitro, uva ursi appears to inhibit the multi-drug transporter protein, P-glycoprotein. This effect has not been reported in humans.

Likelihood Possible Evidence D
Uva Ursi full monograph & interactions

Saw Palmetto berry extract3 drug types · 174 drugs

Anticoagulant/Antiplatelet Drugs

Saw palmetto might increase the risk of bleeding with anticoagulant or antiplatelet drugs.
Saw palmetto is reported to prolong bleeding time. Theoretically, it might increase the risk of bleeding when used concomitantly with anticoagulant or antiplatelet drugs.

Likelihood Possible Evidence D
Contraceptive Drugs

Saw palmetto might reduce the effectiveness of contraceptive drugs.
Saw palmetto might have antiestrogenic effects. Theoretically, it might interfere with contraceptive drugs taken concomitantly.

Likelihood Possible Evidence B
Estrogens

Saw palmetto might reduce the effectiveness of estrogens.
Saw palmetto might have antiestrogenic effects. Theoretically, it might interfere with estrogens taken concomitantly.

Likelihood Possible Evidence B
Saw Palmetto berry extract full monograph & interactions

Calcium18 drug types · 168 drugs

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.

Likelihood Probable Evidence D
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.

Likelihood Probable Evidence B
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.

Likelihood Probable Evidence B
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.

Likelihood Possible Evidence B
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.

Likelihood Probable Evidence D
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.

Likelihood Probable Evidence C
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.

Likelihood Possible Evidence B
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.

Likelihood Possible Evidence B
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.

Likelihood Probable Evidence D
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.

Likelihood Probable Evidence B
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.

Likelihood Possible Evidence B
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.

Likelihood Probable Evidence B
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.

Likelihood Possible Evidence B
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.

Likelihood Possible Evidence B
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.

Likelihood Probable Evidence C
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.

Likelihood Probable Evidence C
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.

Likelihood Probable Evidence D
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.

Likelihood Unlikely Evidence D
Calcium full monograph & interactions

Pumpkin Seed Extract1 drug type · 1 drug

Lithium

Pumpkin might reduce excretion and increase levels of lithium.
Pumpkin is thought to have diuretic properties. Theoretically, this might reduce excretion and increase levels of lithium. The dose of lithium might need to be decreased.

Likelihood Probable Evidence D
Pumpkin Seed Extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Saw Palmetto, from the product label.

Bronson Laboratories

Name
Bronson Laboratories
City
Lindon
State
UT
ZipCode
84042
Pharmacist Counseling Corner

Saw Palmetto by Bronson Laboratories: Common Questions

Does Saw Palmetto by Bronson Laboratories interact with any medications?
Yes. Based on its ingredients, Saw Palmetto has a known interaction with 996 medications, including 7 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Saw Palmetto contains 5 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.
Is this safe to take during pregnancy?
No. Uva ursi, saw palmetto, and pygeum are all rated unsafe or likely unsafe in pregnancy due to hormonal effects or lack of safety data. The calcium in this product is fine at recommended amounts, but overall the supplement should not be used in pregnancy. Talk with your doctor if you're pregnant or planning to become pregnant.
Is this safe while breastfeeding?
There isn't enough safety information on uva ursi, pygeum, or saw palmetto during breastfeeding to recommend this product. Calcium is generally okay at recommended levels, and pumpkin seed safety during breastfeeding is not well studied. Check with your provider before using it.
What's the most common side effect I might see?
Stomach upset, nausea, diarrhea, and constipation are the most frequent mild effects across the ingredients in this product. They're usually temporary and reversible. If they don't settle in a few days, stop and talk with your pharmacist.
How long can I take uva ursi safely?
Uva ursi is meant for short-term use only and can be toxic at high doses or with prolonged use. Do not take this supplement long-term without guidance from your doctor or pharmacist on safe duration.
Does this product actually work for benign prostate enlargement?
Pygeum and pumpkin seed extract are possibly effective, but saw palmetto—the classic prostate herb—is rated possibly ineffective for this condition based on the evidence we hold. Results vary, and you should discuss realistic expectations with your doctor.
Why is calcium a concern in this supplement?
Calcium can reduce or block the absorption of several important medications, including HIV drugs, thyroid medication, and certain heart drugs. It can also cause a dangerous reaction if given intravenously with the antibiotic ceftriaxone. That's why timing and checking your medications first matter so much.

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.

Saw Palmetto label
Go deeper

The Full Monographs Behind Saw Palmetto’s Ingredients

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

Herb & supplement monograph

Calcium

Interacts with 168 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 falls short. Most people do best getting...

Read the full Calcium monograph → Herb & supplement monograph

Uva Ursi

Interacts with 803 drugs

Uva ursi is a traditional herb used mainly for urinary tract infections, and its leaves contain a compound called arbutin that may have antimicrobial effects in the urine. Evidence in people...

Read the full Uva Ursi monograph → Herb & supplement monograph

Pygeum

Pygeum is an extract from the bark of the African cherry tree that is most often used to ease urinary symptoms linked to an enlarged prostate. Some studies suggest modest benefit for these s...

Read the full Pygeum monograph → Herb & supplement monograph

Saw Palmetto

Interacts with 174 drugs

Saw palmetto is a plant extract most often used for urinary symptoms linked to an enlarged prostate (BPH). The best research suggests it works no better than a placebo for most men, though i...

Read the full Saw Palmetto monograph → Herb & supplement monograph

Pumpkin

Interacts with 1 drug

Pumpkin is a nutritious squash, and its seeds and seed oil are the parts most often used as supplements, mainly for urinary and prostate symptoms. The evidence for these uses is limited and...

Read the full Pumpkin monograph →
Sources

Sources & How We Checked

Saw Palmetto'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 100 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.

Calcium 62 references
  1. Shils M, Olson A, Shike M. Modern Nutrition in Health and Disease. 8th ed. Philadelphia, PA: Lea and Febiger, 1994.
  2. Hernandez-Avila M, Gonzalez-Cossio T, Hernandez-Avila JE, et al. Dietary calcium supplements to lower blood lead levels in lactating women: a randomized placebo-controlled trial. Epidemiology 2003;14:206-12.. PubMed
  3. Thys-Jacobs S, Ceccarelli S, Bierman A, et al. Calcium supplementation in premenstrual syndrome: a randomized crossover trial. J Gen Intern Med 1989;4:183-9. PubMed
  4. Maton PN, Burton ME. Antacids revisited: a review of their clinical pharmacology and recommended therapeutic use. Drugs 1999;57:855-70.
  5. Clemens JD, Feinstein AR. Calcium carbonate and constipation: a historical review of medical mythopoeia. Gastroenterology 1977;72:957-61. DOI
  6. Saunders D, Sillery J, Chapman R. Effect of calcium carbonate and aluminum hydroxide on human intestinal function. Dig Dis Sci 1988;33:409-13. PubMed
  7. Friedman PA, Bushinsky DA. Diuretic effects on calcium metabolism. Semin Nephrol 1999;19:551-6.
  8. Koo WK, Walters JC, Esterlitz J, et al. Maternal calcium supplementation and fetal bone mineralization. Obstet Gynecol 1999;94:577-82. DOI
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Uva Ursi 8 references
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Pygeum 3 references
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Saw Palmetto 22 references
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Pumpkin 5 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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