LGD-4033 Sour Grape Ingredients & Drug Interactions
What is this page for?
First and foremost: checking LGD-4033 Sour Grape 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
LGD-4033 Sour Grape is a dietary supplement by BioGear Nutrition with 6 active ingredients. Its ingredients are commonly taken for muscle building, athletic performance and strength, body recomposition.Based on those ingredients, 497 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are LGD-4033, Dibasic Calcium Phosphate Anhydrous. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against LGD-4033 Sour Grape by BioGear Nutrition
Ask about any prescription or over-the-counter medication and we check it for interactions with LGD-4033 Sour Grape by BioGear Nutrition — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
Ask the Pharmacist
A licensed pharmacist will answer your question by email — free, usually within 24 hours.
Got it — thank you!
A licensed pharmacist will answer within 24 hours. Keep an eye on your email (worth checking spam, just in case).
HelloPharmacist Scorecard of LGD-4033 Sour Grape by BioGear Nutrition
Four independent checks of what is known — a summary of the available information, not a grade of the product itself.
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
The stated purpose hasn't been mapped to our evidence data yet.
Why this rating?
- We haven't mapped this product's purpose to our evidence data yet — it'll be graded on the next content refresh.
Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.
Why this rating?
- The label discloses an exact amount for 1 of its 6 active ingredients.
- “Sublingual Delivery Complex” is a proprietary blend — the label gives one combined amount (210 mg) without saying how much of each component you get.
At least one ingredient has a documented Major-severity interaction. Check your medications for a personalized result.
Why this rating?
- 2 of the 3 matched ingredients can interact with medications — Calcium, Ligandrol.
- The most serious interaction on file is rated Major.
- Some involve high-stakes drug classes: heart-rhythm medications; lithium.
- For scale: 498 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.
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 3 of the 3 matched ingredients.
- Pregnancy & breastfeeding safety ratings cover 3 of 3.
- General safety write-ups exist for 3 of 3.
- Remember: this measures how much safety information exists. Thin data is not the same as being safe.
HelloPharmacist summaryFormula with limited ingredient disclosure with no assessable stated purpose. Major medication interactions have been identified, and safety information is well characterized.
Assessment coverage: 3 of 6 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Apr 25, 2019.
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 LGD-4033 Sour Grape, straight from the product label.
| Brand | BioGear Nutrition |
|---|---|
| Net contents | 0 Not Present |
| Market status | Off market |
| Date entered into DSLD | Apr 25, 2019 |
| DSLD ID | 200711 |
| Product type | Other Combinations |
| Supplement form | Tablet Or Pill |
| Dietary claims / uses | Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years) |
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 LGD-4033 Sour Grape by BioGear Nutrition, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Xylitol | 0 NP | -- |
| Microcrystalline Cellulose | 0 NP | -- |
| Crospovidone | 0 NP | -- |
| D-Mannitol | 0 NP | -- |
| Dibasic Calcium Phosphate Anhydrous | 0 NP | -- |
| LGD-4033 | 15 mg | -- |
| Sublingual Delivery Complex | 210 mg | -- |
Other ingredients: Artificial flavors, Artificial sweeteners, Silicon Dioxide, 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.
Formula
Ligandrol
General Statements
Bulking agent Reduce body fat Sense of well being
FDA Statement of Identity
Dietary Supplement
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
LGD-4033 Sour Grape by BioGear Nutrition 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 LGD-4033 Sour Grape by BioGear Nutrition
These are the 6 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Tablet(s) Dosage formTablet Or Pill 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.
LGD-4033
Interacts with370 drugs
Ligandrol (LGD-4033) is a synthetic selective androgen receptor modulator (SARM), not a natural herb or approved dietary supplement. It is not approve...
LGD-4033 monograph & interactionsSublingual Delivery Complex
- › Xylitol
- › Microcrystalline Cellulose
- › Crospovidone
- › D-Mannitol
- › Dibasic Calcium Phosphate Anhydrous
Other (inactive) ingredients: Artificial flavors, Artificial sweeteners, Silicon Dioxide, Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.
LGD-4033 Sour Grape by BioGear Nutrition Drug Interactions
LGD-4033 Sour Grape contains 6 ingredients, and 2 of them have known drug interactions. Altogether they interact with 497 medications. Here’s the picture, then you can look up your own drug.
Want to check YOUR meds against LGD-4033 Sour Grape?
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 checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in LGD-4033 Sour Grape interact with 497 drugs. Click any drug to see the details.
2 of the 6 ingredients in LGD-4033 Sour Grape interact with drugs. Each result below shows which ingredient is responsible. LGD-4033 Dibasic Calcium Phosphate Anhydrous
CeftriaxoneRocephin
How Ceftriaxone interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Dibasic Calcium Phosphate AnhydrousCeftriaxone (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 Dibasic Calcium Phosphate Anhydrous + Ceftriaxone interactionCobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide FumarateGenvoya
How Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interacts with LGD-4033 Sour Grape — through 2 ingredients. Tap an ingredient for the detail:
Dibasic Calcium Phosphate AnhydrousElvitegravir (vitekta), Bictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Major
Interaction Summary
Calcium seems to reduce levels of elvitegravir.
Read the full Dibasic Calcium Phosphate Anhydrous + Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interactionLgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interactionDolutegravirTivicay
How Dolutegravir interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Dibasic Calcium Phosphate AnhydrousDolutegravir (tivicay) Major
Interaction Summary
Calcium seems to reduce levels of dolutegravir.
Read the full Dibasic Calcium Phosphate Anhydrous + Dolutegravir interactionDolutegravir, Emtricitabine, Tenofovir AlafenamideDolutegravir, Emtricitabine, Tenofovir Alafenamide
How Dolutegravir, Emtricitabine, Tenofovir Alafenamide interacts with LGD-4033 Sour Grape — through 2 ingredients. Tap an ingredient for the detail:
Dibasic Calcium Phosphate AnhydrousDolutegravir (tivicay), Bictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Major
Interaction Summary
Calcium seems to reduce levels of dolutegravir.
Read the full Dibasic Calcium Phosphate Anhydrous + Dolutegravir, Emtricitabine, Tenofovir Alafenamide interactionLgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Dolutegravir, Emtricitabine, Tenofovir Alafenamide interactionDolutegravir, RilpivirineJuluca
How Dolutegravir, Rilpivirine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Dibasic Calcium Phosphate AnhydrousDolutegravir (tivicay) Major
Interaction Summary
Calcium seems to reduce levels of dolutegravir.
Read the full Dibasic Calcium Phosphate Anhydrous + Dolutegravir, Rilpivirine interactionElvitegravirVitekta
How Elvitegravir interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Dibasic Calcium Phosphate AnhydrousElvitegravir (vitekta) Major
Interaction Summary
Calcium seems to reduce levels of elvitegravir.
Read the full Dibasic Calcium Phosphate Anhydrous + Elvitegravir interactionElvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil FumarateStribild
How Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interacts with LGD-4033 Sour Grape — through 2 ingredients. Tap an ingredient for the detail:
Dibasic Calcium Phosphate AnhydrousElvitegravir (vitekta), Bictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Major
Interaction Summary
Calcium seems to reduce levels of elvitegravir.
Read the full Dibasic Calcium Phosphate Anhydrous + Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interactionLgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interaction6-mercaptopurinePurinethol
How 6-mercaptopurine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + 6-mercaptopurine interactionAbacavir Sulfate, Dolutegravir, LamivudineTriumeq
How Abacavir Sulfate, Dolutegravir, Lamivudine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Abacavir Sulfate, Dolutegravir, Lamivudine interactionAbacavir, LamivudineEpzicom
How Abacavir, Lamivudine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Abacavir, Lamivudine interactionAbiraterone
How Abiraterone interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Abiraterone interactionAbiraterone AcetateYonsa, Zytiga
How Abiraterone Acetate interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Abiraterone Acetate interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acarbose interactionAcebutololRhotral, Sectral
How Acebutolol interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acebutolol interactionAcetaminophenChildren's Tylenol, Children's Tylenol Meltaways, Tylenol, Tylenol Ex Strength
How Acetaminophen interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Brompheniramine, PhenylpropanolamineDimetapp Cold and Flu
How Acetaminophen, Brompheniramine, Phenylpropanolamine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Brompheniramine, Phenylpropanolamine interactionAcetaminophen, ButalbitalAxocet, Bancap, Bucet, Butex Forte, Esgic CF, Orbivan CF +5 more
How Acetaminophen, Butalbital interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Butalbital interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Caffeine, CodeineGesic C15, Gesic C30, Gesic C8, Lenoltec 1, Lenoltec 2, Lenoltec 3 +1 more
How Acetaminophen, Caffeine, Codeine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Caffeine, IsomethepteneMigralam
How Acetaminophen, Caffeine, Isometheptene interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Caffeine, Isometheptene interactionAcetaminophen, Caffeine, PyrilamineMidol Max Strength Menstrual
How Acetaminophen, Caffeine, Pyrilamine interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Caffeine, Pyrilamine interactionAcetaminophen, Chlorpheniramine Maleate, Dextromethorphan HbrVicks Formula 44M Cough, Cold & Flu Relief
How Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interacts with LGD-4033 Sour Grape — through 1 ingredient. Tap an ingredient for the detail:
Lgd-4033Hepatotoxic Drugs Moderate
Interaction Summary
Theoretically, concomitant use might have additive hepatotoxic effects.
Read the full Lgd-4033 + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionEach ingredient & the kinds of drugs it affects
For each ingredient in LGD-4033 Sour Grape 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.
LGD-4033
Hepatotoxic Drugs
Theoretically, concomitant use might have additive hepatotoxic effects.
In case reports, patients were diagnosed with liver injury thought to be related to the use of products containing ligandrol.
Dibasic Calcium Phosphate Anhydrous
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.
Brand information
Manufacturer and brand details for LGD-4033 Sour Grape, from the product label.
LGD-4033 Sour Grape by BioGear Nutrition: Common Questions
Does LGD-4033 Sour Grape by BioGear Nutrition interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if LGD-4033 Sour Grape is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
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.
The Full Monographs Behind LGD-4033 Sour Grape’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Ligandrol
Interacts with 370 drugsLigandrol (LGD-4033) is a synthetic selective androgen receptor modulator (SARM), not a natural herb or approved dietary supplement. It is not approved for human use, is banned in sports, an...
Read the full Ligandrol monograph → Herb & supplement monographXylitol
Xylitol is a sugar alcohol used as a low-calorie sweetener that has the best-supported benefit for reducing cavities, especially in chewing gum or lozenges. It is generally safe for people i...
Read the full Xylitol 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
LGD-4033 Sour Grape'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 78 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.
Xylitol 7 references
- Martindale W. Martindale the Extra Pharmacopoeia. Pharmaceutical Press, 1999.
- Weissman JD, Fernandez F, Hwang PH. Xylitol nasal irrigation in the management of chronic rhinosinusitis: a pilot study. Laryngoscope 2011;121:2468-72. PubMed
- Okamoto K, Kagami M, Kawai M, et al. Anaphylaxis to xylitol diagnosed by skin prick test and basophil activation test. Allergol Int. 2019;68(1):130-131. PubMed
- Rabago D, Kille T, Mundt M, Obasi C. Results of a RCT assessing saline and xylitol nasal irrigation for CRS and fatigue in Gulf War illness. Laryngoscope Investig Otolaryngol 2020;5(4):613-620.
- Wołyniec W, Szwarc A, Kasprowicz K, et al. Impact of hydration with beverages containing free sugars or xylitol on metabolic and acute kidney injury markers after physical exercise. Front Physiol 2022;13:841056. PubMed
- Bordier V, Teysseire F, Drewe J, et al. Effects of a 5-week intake of erythritol and xylitol on vascular function, abdominal fat and glucose tolerance in humans with obesity: a pilot trial. BMJ Nutr Prev Health 2023;6(2):264-272. PubMed
- Margulis I, Cohen-Kerem R, Stein N, et al. Xylitol nasal spray for prevention of recurrent acute otitis media in children: A prospective two-center cohort study. Int J Pediatr Otorhinolaryngol 2024;176:111818. PubMed
Calcium 62 references
- Shils M, Olson A, Shike M. Modern Nutrition in Health and Disease. 8th ed. Philadelphia, PA: Lea and Febiger, 1994.
- 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
- 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
- Maton PN, Burton ME. Antacids revisited: a review of their clinical pharmacology and recommended therapeutic use. Drugs 1999;57:855-70.
- Clemens JD, Feinstein AR. Calcium carbonate and constipation: a historical review of medical mythopoeia. Gastroenterology 1977;72:957-61. DOI
- 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
- Friedman PA, Bushinsky DA. Diuretic effects on calcium metabolism. Semin Nephrol 1999;19:551-6.
- Koo WK, Walters JC, Esterlitz J, et al. Maternal calcium supplementation and fetal bone mineralization. Obstet Gynecol 1999;94:577-82. DOI
- Raman L, Rajalakshmi K, Krishnamachari KAVR, et al. Effect of calcium supplementation to undernourished mothers during pregnancy on the bone density of the neonates. Am J Clin Nutr 1978; 31:466-9. DOI
- Murry JJ, Healy MD. Drug-mineral interactions: a new responsibility for the hospital dietician. J Am Diet Assoc 1991;91:66-73.
- Chan JM, Giovannucci E, Andersson SO, et al. Dairy products, calcium, phosphorous, vitamin D, and risk of prostate cancer. Cancer Causes Control 1998;9:559-66.
- Butner LE, Fulco PP, Feldman G, et al. Calcium carbonate-induced hypothyroidism. Ann Intern Med 2000:132:595. PubMed
- Schneyer CR. Calcium carbonate and reduction of levothyroxine efficacy. JAMA 1998;279:750. PubMed
- Moser LR, Smythe MA, Tisdale JE. The use of calcium salts in the prevention and management of verapamil-induced hypotension. Ann Pharmacother 2000;34:622-9. PubMed
- Singh N, Singh PN, Hershman JM. Effect of calcium carbonate on the absorption of levothyroxine. JAMA 2000;283:2822-5. PubMed
- Kahela P, Anttila M, Tikkanen R, Sundquist H. Effect of food, food constituents and fluid volume on the bioavailability of sotalol. Acta Pharmacol Toxicol (Copenh) 1979;44:7-12.. PubMed
- Pletz MW, Petzold P, Allen A, et al. Effect of calcium carbonate on bioavailability of orally administered gemifloxacin. Antimicrob Agents Chemother 2003;47:2158-60.. PubMed
- Bar-Or D, Yoel G. Calcium and calciferol antagonize effect of verapamil in atrial fibrillation. Br Med J 1981;282:1585-6.
- Decktor DL, Robinson M, Maton PN, et al. Effects of aluminum/magnesium hydroxide and calcium carbonate on esophageal and gastric pH in subjects with heartburn. Am J Ther 1995;2:546-52. PubMed
- Simoneau G. Absence of rebound effect with calcium carbonate. Eur J Drug Metab Pharmacokinet 1996;21:351-7. PubMed
- Peters ML, Leonard M, Licata AA. Role of alendronate and risedronate in preventing and treating osteoporosis. Cleve Clin J Med 2001;68:945-51. PubMed
- Bourke JF, Mumford R, Whittaker P, et al. The effects of topical calcipotriol on systemic calcium homeostasis in patients with chronic plaque psoriasis. J Am Acad Dermatol 1997;37:929-34.
- Gueguen L, Pointillart A. The bioavailability of dietary calcium. J Am Coll Nutr 2000;19:119s-136s. PubMed
- Vella A, Gerber TC, Hayes DL, Reeder GS. Digoxin, hypercalcaemia, and cardiac conduction. Postgrad Med J 1999;75:554-6. PubMed
- Bania TC, Blaufeux B, Hughes S, et al. Calcium and digoxin vs. calcium alone for severe verapamil toxicity. Acad Emerg Med 2000;7:1089-96. PubMed
- Tseng M, Breslow RA, Graubard BI, Ziegler RG. Dairy, calcium, and vitamin D intakes and prostate cancer risk in the National Health and Nutrition Examination Epidemiologic Follow-up Study cohort. Am J Clin Nutr 2005;81:1147-54. PubMed
- Weingarten MA, Zalmanovici A, Yaphe J. Dietary calcium supplementation for preventing colorectal cancer and adenomatous polyps. Cochrane Database Syst Rev 2004;(1):CD003548. PubMed
- Tavani A, Bertuccio P, Bosetti C, et al. Dietary intake of calcium, vitamin D, phosphorus and the risk of prostate cancer. Eur Urol 2005;48:27-33. PubMed
- Giovannucci E, Liu Y, Stampfer MJ, Willett WC. A prospective study of calcium intake and incident and fatal prostate cancer. Cancer Epidemiol Biomarkers Prev 2006;15:203-10. PubMed
- Rocephin (ceftriaxone) and calcium interaction. Pharmacist's Letter / Prescriber's Letter 2007;23(10):231005.
- Bolland MJ, Barber PA, Doughty RN, et al. Vascular events in healthy older women receiving calcium supplementation: randomised control trial. BMJ 2008;336:262-6.
- Bolland MJ, Avenell A, Baron JA, et al. Effect of calcium supplements on risk of myocardial infarction and cardiovascular events: meta-analysis. BMJ 2010;341:c3691. PubMed
- Calcium supplementation and vascular events. Pharmacist's Letter / Prescriber's Letter 2008;24(3):240306.
- Dietary reference intakes for calcium and vitamin D. Institute of Medicine, November 30, 2010. Available at: http://www.iom.edu/~/media/Files/Report%20Files/2010/Dietary-Reference-Intakes-for-Calcium-and-Vitamin-D/Vitamin%20D%20and%20Calcium%202010%20Repo
- Coburn JW, Mischel MG, Goodman WG, et al. Calcium citrate markedly enhances aluminum absorption from aluminum hydroxide. Am J Kidney Dis. 1991;17(6):708-11. PubMed
- Bradley JS, Wassel RT, Lee L, et al. Intravenous ceftriaxone and calcium in the neonate: assessing the risk for cardiopulmonary adverse events. Pediatrics. 2009;123(4):e609-13. PubMed
- Kays MB, Overholser BR, Mueller BA, et al. Effects of sevelamer hydrochloride and calcium acetate on the oral bioavailability of ciprofloxacin. Am J Kidney Dis. 2003;42(6):1253-9. PubMed
- Neuhofel, A. L., Wilton, J. H., Victory, J. M., Hejmanowsk, L. G., and Amsden, G. W. Lack of bioequivalence of ciprofloxacin when administered with calcium-fortified orange juice: a new twist on an old interaction. J Clin Pharmacol. 2002;42(4):461-466. DOI
- Dickinson, H. O., Nicolson, D. J., Cook, J. V., Campbell, F., Beyer, F. R., Ford, G. A., and Mason, J. Calcium supplementation for the management of primary hypertension in adults. Cochrane.Database.Syst.Rev. 2006;(2):CD004639. PubMed
- Jones, B. J. and Twomey, P. J. Requesting patterns for serum calcium concentration in patients on long-term lithium therapy. Int J Clin Pract. 2009;63(1):170-172. PubMed
- Levine, M., Nikkanen, H., and Pallin, D. J. The effects of intravenous calcium in patients with digoxin toxicity. J Emerg.Med. 2011;40(1):41-46. PubMed
- Castelo-Branco, C., Ciria-Recasens, M., Cancelo-Hidalgo, M. J., Palacios, S., Haya-Palazuelos, J., Carbonell-Abello, J., Blanch-Rubio, J., Martinez-Zapata, M. J., Manasanch, J., and Perez-Edo, L. Efficacy of ossein-hydroxyapatite complex compared with ca
- Li K, Kaaks R, Linseisen J, Rohrmann S. Associations of dietary calcium intake and calcium supplementation with myocardial infarction and stroke risk and overall cardiovascular mortality in the Heidelberg cohort of the European Prospective Investigation i
- Chung M, Tang AM, Fu Z. Calcium Intake and Cardiovascular Disease Risk: An Updated Systematic Review and Meta-analysis. Ann Intern Med. 2016 Oct 25. PubMed
- Nolan CR, Califano JR, Butzin CA. Influence of calcium acetate or calcium citrate on intestinal aluminum absorption. Kidney Int. 1990;38(5):937-41. PubMed
- Lewis JR, Radavelli-Bagatini S, Rejnmark L, et al. The effects of calcium supplementation on verified coronary heart disease hospitalization and death in postmenopausal women: a collaborative meta-analysis of randomized controlled trials. J Bone Miner Res PubMed
- Jalloh MA, Gregory PJ, Hein D, et al. Dietary supplement interactions with antiretrovirals: a systematic review. Int J STD AIDS. 2017 Jan;28(1):4-15. PubMed
- Lappe J, Watson P, Travers-Gustafson D, Recker R, Garland C, Gorham E, Baggerly K, McDonnell SL. Effect of Vitamin D and Calcium Supplementation on Cancer Incidence in Older Women: A Randomized Clinical Trial. JAMA. 2017 Mar 28;317(12):1234-1243. PubMed
- Grove ML, Cook D. Calcium and heart attacks. Doesn't apply to most calcium prescriptions. BMJ. 2010;341:c5003. PubMed
- Insentress [package insert]. Whitehouse Station, NJ: Merck Sharp & Dohme Corp.; 2014.
- Roberts JL, Kiser JJ, Hindman JT, Meditz AL. Virologic failure with a raltegravir-containing antiretroviral regimen and concomitant calcium administration. Pharmacotherapy 2011;31(10):298e-302e. DOI
- Vitekta [package insert]. Foster City, CA: Gilead Sciences, Inc.; 2014.
- Storan ER, O'Gorman SM, Murphy A, Laing M. Case Report of Calciphylaxis Secondary to Calcium and Vitamin D<sub>3</sub> Supplementation. J Cutan Med Surg. 2017;21(2):162-163. DOI
- Jenkins DJA, Spence JD, Giovannucci EL, et al. Supplemental vitamins and minerals for CVD prevention and treatment. J Am Coll Cardiol 2018;71(22):2570-84. PubMed
- Borkenhagen JF, Connor EL, Stafstrom CE. Neonatal hypocalcemic seizures due to excessive maternal calcium ingestion. Pediatr Neurol 2013;48(6):469-71. PubMed
- WHO recommendations on antenatal care for a positive pregnancy experience. Geneva: World Health Organization; 2016 (http://www.who.int/reproductivehealth/publications/maternal_perinatal_health/ anc-positive-pregnancy-experience/en/).
- Aune D, Navarro Rosenblatt DA, Chan DS, et al. Dairy products, calcium, and prostate cancer risk: a systematic review and meta-analysis of cohort studies. Am J Clin Nutr. 2015;101(1):87-117. PubMed
- Lan T, Park Y, Colditz GA, et al. Adolescent dairy product and calcium intake in relation to later prostate cancer risk and mortality in the NIH-AARP Diet and Health Study. Cancer Causes Control. 2020;31(10):891-904. PubMed
- Zhang Y, Li Y, Liu J, et al. Association of Vitamin D or Calcium Supplementation with Cardiovascular Outcomes and Mortality: A Meta-Analysis with Trial Sequential Analysis. J Nutr Health Aging 2021;25(2):263-270. PubMed
- Myung SK, Kim HB, Lee YJ, Choi YJ, Oh SW. Calcium Supplements and Risk of Cardiovascular Disease: A Meta-Analysis of Clinical Trials. Nutrients 2021;13(2):368. PubMed
- Hetaimish B. Neonatal Calcinosis Cutis After Treatment of Hypocalcemia with Calcium Gluconate: A Report of 2 Cases. Am J Case Rep 2024;25:e943397. PubMed
- US Food and Drug Administration (FDA). Biktarvy Prescribing Information. October 2024. Available at: https://www.accessdata.fda.gov/drugsatfda_docs/label/2024/210251Orig1s020lbl.pdf. Accessed July 16, 2025.
Ligandrol 9 references
- Joseph JF, Parr MK. Synthetic androgens as designer supplements. Curr Neuropharmacol. 2015;13(1):89-100. PubMed
- Warning Letter: Ironmag Labs 10/23/17. FDA Inspections, Compliance, Enforcement, and Criminal Investigations, October 23, 2017. https://www.fda.gov/iceci/enforcementactions/warningletters/2017/ucm582464.htm Accessed: November 1, 2017
- Warning Letter: Panther Sports Nutrition 10/23/17. FDA Inspections, Compliance, Enforcement, and Criminal Investigations, October 23, 2017. https://www.fda.gov/iceci/enforcementactions/warningletters/2017/ucm581630.htm. Accessed: November 1, 2017
- Warning Letter: Infantry Labs LLC 10/23/17. FDA Inspections, Compliance, Enforcement, and Criminal Investigations, October 23, 2017. https://www.fda.gov/iceci/enforcementactions/warningletters/2017/ucm582685.htm. Accessed: November 1, 2017
- Barbara M, Dhingra S, Mindikoglu AL. Drug-induced liver injury associated with alpha bolic (RAD-140) and alpha elite (RAD-140 and LGD-4033). ACG Case Rep J 2020;7(6):e00409. PubMed
- Barbara M, Dhingra S, Mindikoglu AL. Ligandrol (LGD-4033)-Induced Liver Injury. ACG Case Rep J 2020;7(6):e00370. PubMed
- Koller T, Vrbova P, Meciarova I, et al. Liver injury associated with the use of selective androgen receptor modulators and post-cycle therapy: Two case reports and literature review. World J Clin Cases 2021;9(16):4062-4071. PubMed
- Flores JE, Chitturi S, Walker S. Drug-induced liver injury by selective androgenic receptor modulators. Hepatol Commun. 2020;4(3):450-452. PubMed
- Basaria S, Collins L, Dillon EL, et al. The safety, pharmacokinetics, and effects of LGD-4033, a novel nonsteroidal oral, selective androgen receptor modulator, in healthy young men. J Gerontol A Biol Sci Med Sci 2013;68(1):87-95. PubMed
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