Interactions on record — worth a quick check against your medications. Based on 1 of 6 ingredients. Check your meds →
Dietary supplement

TheralacPRO Ingredients & Drug Interactions

by Master Supplements

TheralacPRO label
See full label image
Capsule Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking TheralacPRO against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

TheralacPRO is a dietary supplement by Master Supplements with 6 active ingredients. Its ingredients are commonly taken for digestive health and balance, diarrhea (including antibiotic-related), vaginal yeast and bacterial infections.Based on those ingredients, 182 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Lactobacillus acidophilus LA-14. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against TheralacPRO by Master Supplements

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

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HelloPharmacist Scorecard of TheralacPRO by Master Supplements

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

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 0 of its 6 active ingredients.
  • “Proprietary Probiotic Blend” is a proprietary blend — the label gives one combined amount (205.63 mg) without saying how much of each component you get.

TheralacPRO contains six probiotic strains — live microorganisms intended to support gut health. The two we have data for are Lactobacillus acidophilus (listed as two separate strains: LA-14 and plain L. acidophilus) and Bifidobacterium animalis lactis (also listed twice: as Bi-07 and plain B. animalis lactis).

The product also includes Lactobacillus rhamnosus GG and Lactobacillus paracasei, both widely used probiotics. The remaining ingredients are fillers and binders — microcrystalline cellulose, sodium alginate, magnesium stearate, and others — to hold the capsule together.

Does it work?

Moderate 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
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: Supports digestive and immune health.
  • We looked for evidence on: Antibiotic-associated diarrhea, Bacterial vaginosis, Clostridioides difficile infection, Constipation, Inflammatory bowel disease (IBD), Irritable bowel syndrome (IBS) — and 4 related terms.
  • The strongest evidence on file: Lactobacillus Acidophilus is rated "Possibly Effective" for Antibiotic-associated diarrhea (Natural Medicines).
  • Also on file: Lactobacillus Acidophilus is rated "Possibly Effective" for Bacterial vaginosis, Irritable bowel syndrome (IBS).
  • Also on file: Lactobacillus Acidophilus is rated "Insufficient Reliable Evidence To Rate" for Respiratory tract infections, Constipation, Inflammatory bowel disease (IBD), Lactose intolerance.

For the Lactobacillus acidophilus strains in this product, the evidence suggests they may help with irritable bowel syndrome (IBS), Helicobacter pylori infection, antibiotic-associated diarrhea, and bacterial vaginosis — all rated possibly effective. The same strains were rated possibly ineffective for atopic disease (allergic conditions).

For acute respiratory distress syndrome, the evidence isn't yet strong enough to rate. We don't have effectiveness ratings on file for the other strains — Lactobacillus rhamnosus GG, Bifidobacterium animalis lactis Bi-07, Bifidobacterium animalis lactis, or Lactobacillus paracasei — so we can't speak to what they do.

The evidence, ingredient by ingredient Lactobacillus Acidophilus

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Lactobacillus acidophilus is generally well tolerated in healthy adults and children. That said, since it's a live organism, there's a theoretical concern it could cause infection in certain people — cases of bacteremia, sepsis, and other serious infections have been reported, though most are thought to stem from bacteria moving from places where they already live naturally in the body.

When taken by mouth with other probiotics, some people report mild gastrointestinal side effects — stomach pain, bloating, gas, diarrhea, or upset stomach — but these are uncommon. In one trial, a combination of probiotics (including L. acidophilus) was linked to rash and itching in a small number of participants, though it's unclear whether L. acidophilus itself was responsible.

We don't have pregnancy or breastfeeding safety information on file for any of these ingredients, so talk with your doctor or pharmacist if you're pregnant or nursing.

Side effects, ingredient by ingredient Lactobacillus Acidophilus

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Lactobacillus Acidophilus.
  • The most serious interaction on file is rated Moderate.
  • For scale: 182 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

If you take antibiotic drugs, you'll want to talk with your pharmacist about the best way to time TheralacPRO — taking it at the same time could reduce how well it works. For the other probiotic strains we couldn't check (Lactobacillus rhamnosus GG, Bifidobacterium animalis lactis Bi-07 and plain, and Lactobacillus paracasei), we hold no interaction data, so use the medication checker below with your full prescription list to be sure.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

TheralacPRO is a multi-strain probiotic that may help with IBS, antibiotic-related diarrhea, and a few other digestive issues — evidence is still developing. The main thing to watch is timing: if you're on antibiotics, space them apart from this supplement so the antibiotics don't kill off the beneficial bacteria.

If you're generally healthy, it's well tolerated, though some people feel mild stomach upset when they first start. Check your exact medications with our tool before you begin, and talk to your pharmacist if you have any health concerns.

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

Assessment coverage: 2 of 6 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Aug 22, 2025.

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 TheralacPRO, straight from the product label.

Brand Master Supplements
Barcode (UPC) 804879559344
Net contents 31 Vegetable Capsule(s)
Market status On market
Date entered into DSLD Aug 22, 2025
DSLD ID 336277
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (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 TheralacPRO by Master Supplements, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Capsule(s)
Maximum serving Sizes:
2 Capsule(s)
Servings per container
31
UPC/BARCODE
804879559344
IngredientAmount% DV
Proprietary Probiotic Blend205.63 mg--
Lactobacillus rhamnosus GG0 NP--
Lactobacillus acidophilus LA-140 NP--
Bifidobacterium animalis lactis Bi-070 NP--
Lactobacillus acidophilus0 NP--
Bifidobacterium animalis lactis0 NP--
Lactobacillus paracasei0 NP--

Other ingredients: Sodium Alginate, Microcrystalline Cellulose, Cellulose, Water, Trisodium Phosphate, Magnesium Stearate, Silicon Dioxide, LactoStim, Ascorbic Acid, Calcium Silicate

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.
Formulation

TheralacPRO is a high potency, multi-strain probiotic protected by seven U.S. patents covering acid-proof delivery and prebiotic stimulation. Each batch is laboratory tested to meet strict quality control standards; guaranteed at the time of expiration when kept refrigerated.

Professional Probiotic Broad spectrum formula Supports digestive and immune health

Contains No: Milk, Eggs, Gluten, Wheat, Soy, Casein, Nuts, Seafood, or Beef Products.

Suggested/Recommended/Usage/Directions

Suggested use: Take 1 capsule daily. Take 2 capsules a day for additional digestive support. TheralacPRO can be taken with antibiotics; allow at least 2 hours separation.

Precautions

Warning: If you are pregnant, nursing, on medication or have any medical condition consult a health care professional before using this product.

Discontinue use and consult a doctor if any adverse reaction occurs.

Keep out of reach of children.

Available for healthcare professionals at usenzymes,com

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.

Formula

50 Billion CFU guaranteed through expiration CFU= Colony Forming Units

Seals/Symbols

Informed Sport We Test - You Trust Banned Substance Tested every Batch

FDA Statement of Identity

Dietary Supplement

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

See for yourself

TheralacPRO by Master Supplements label

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

TheralacPRO 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 TheralacPRO by Master Supplements

These are the 6 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container31 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.

Proprietary Probiotic Blend

205.63 mg per serving

Other (inactive) ingredients: Sodium Alginate, Microcrystalline Cellulose, Cellulose, Water, Trisodium Phosphate, Magnesium Stearate, Silicon Dioxide, LactoStim, Ascorbic Acid, Calcium Silicate. These complete the product’s ingredient list but are not active constituents.

Interaction report

TheralacPRO by Master Supplements Drug Interactions

Want to check YOUR meds against TheralacPRO?

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
182Drugs
182 Moderate

Ingredients driving the most interactions

Lactobacillus acidophilus LA-14 182

Individual Drug Interactions

The ingredients in TheralacPRO interact with 182 drugs. Click any drug to see the details.

1 of the 6 ingredients in TheralacPRO interact with drugs. Each result below shows which ingredient is responsible. Lactobacillus acidophilus LA-14

Each ingredient & the kinds of drugs it affects

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

Lactobacillus acidophilus LA-141 drug type · 182 drugs

Antibiotic Drugs

Theoretically, taking Lactobacillus acidophilus with antibiotic drugs might decrease the effectiveness of L. acidophilus.
L. acidophilus preparations usually contain live and active organisms. Therefore, simultaneously taking antibiotics might kill a significant number of the organisms. Tell patients to separate administration of antibiotics and L. acidophilus preparations by at least two hours.

Likelihood Probable Evidence D
Lactobacillus acidophilus LA-14 full monograph & interactions
The maker

Brand information

Manufacturer and brand details for TheralacPRO, from the product label.

Master Supplements

See all Master Supplements products
Name
Master Supplements, Inc.
City
Victoria
State
MN
ZipCode
55386
Phone Number
800-926-2961
Web Address
usenzymes.com
Pharmacist Counseling Corner

TheralacPRO by Master Supplements: Common Questions

Does TheralacPRO by Master Supplements interact with any medications?
Yes. Based on its ingredients, TheralacPRO has a known interaction with 182 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
TheralacPRO contains 6 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.
What are the live probiotics in TheralacPRO supposed to do?
TheralacPRO contains six strains of beneficial bacteria intended to support gut health. The Lactobacillus acidophilus strains in it may help with IBS, antibiotic-associated diarrhea, bacterial vaginosis, and Helicobacter pylori infection, though the evidence is still developing.
Can I take TheralacPRO while I'm on antibiotics?
Not at the same time. Antibiotics can kill off the live organisms in TheralacPRO and make it less effective. Ask your pharmacist about the best way to space them apart — many recommend waiting a couple of hours between doses.
What side effects should I expect?
Most people tolerate it well. Some experience mild stomach discomfort, bloating, gas, or diarrhea when they first start — these are uncommon and often settle down. A small number of people in one trial developed rash or itching, though it's unclear if the probiotic itself caused it.
Is TheralacPRO safe to take if I'm pregnant or breastfeeding?
We don't have safety data on file for any of these probiotic strains during pregnancy or breastfeeding. Talk with your doctor or pharmacist — they can give you personalized advice based on your situation.
Does TheralacPRO have a lot of fillers?
It contains several inactive ingredients — microcrystalline cellulose, sodium alginate, magnesium stearate, and a few others — to hold the capsule together. These are standard in supplements.

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

Not sure if TheralacPRO is safe with your meds?

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

TheralacPRO label
Go deeper

The Full Monographs Behind TheralacPRO’s Ingredients

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

Herb & supplement monograph

Lactobacillus Acidophilus

Interacts with 182 drugs

Lactobacillus acidophilus is a 'friendly' bacterium used as a probiotic to support gut and vaginal health. It is generally well tolerated in healthy people, and there is reasonable evidence...

Read the full Lactobacillus Acidophilus monograph →
Sources

Sources & How We Checked

TheralacPRO'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 15 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.

Lactobacillus Acidophilus 15 references
  1. Pierce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York: The Stonesong Press, 1999:19.
  2. Begtrup LM, de Muckadell OB, Kjeldsen J, Christensen RD, Jarbøl DE. Long-term treatment with probiotics in primary care patients with irritable bowel syndrome--a randomised, double-blind, placebo controlled trial. Scand J Gastroenterol 2013;48(10):1127-35 PubMed
  3. Chatterjee S, Kar P, Das T, Ray S, Gangulyt S, Rajendiran C, Mitra M. Randomised placebo-controlled double blind multicentric trial on efficacy and safety of Lactobacillus acidophilus LA-5 and Bifidobacterium BB-12 for prevention of antibiotic-associated
  4. Shavakhi A, Tabesh E, Yaghoutkar A, Hashemi H, Tabesh F, Khodadoostan M,Minakari M, Shavakhi S, Gholamrezaei A. The effects of multistrain probiotic compound on bismuth-containing quadruple therapy for Helicobacter pylori infection: a randomized placebo-c
  5. Karamali M, Dadkhah F, Sadrkhanlou M, et al. Effects of probiotic supplementation on glycaemic control and lipid profiles in gestational diabetes: a randomized, double-blind, placebo-controlled trial. Diabetes Metab 2016;42(4):234-41. PubMed
  6. Badehnoosh B, Karamali M, Zarrati M, et al. The effects of probiotic supplementation on biomarkers of inflammation, oxidative stress and pregnancy outcomes in gestational diabetes. J Matern Fetal Neonatal Med. 2018 May;31(9):1128-1136.
  7. Kumar S, Kumar R, Rohilla L, Jacob N, Yadav J, Sachdeva N. A high potency multi-strain probiotic improves glycemic control in children with new-onset type 1 diabetes mellitus: A randomized, double-blind, and placebo-controlled pilot study. Pediatr Diabete
  8. Shahriari A, Karimi E, Shahriari M, Aslani N, Khooshideh M, Arab A. The effect of probiotic supplementation on the risk of gestational diabetes mellitus among high-risk pregnant women: A parallel double-blind, randomized, placebo-controlled clinical trial PubMed
  9. Xiao SD, Zhang DZ, Lu H, et al. Multicenter, randomized, controlled trial of heat-killed Lactobacillus acidophilus LB in patients with chronic diarrhea. Adv Ther. 2003;20(5):253-60.
  10. Rossi F, Amadoro C, Gasperi M, Colavita G. Lactobacilli infection case reports in the last three years and safety implications. Nutrients. 2022;14(6):1178. PubMed
  11. Ozer M, Goksu SY, Shahverdiani A, Mustafa M. Lactobacillus acidophilus-induced endocarditis and associated splenic abscess. Case Rep Infect Dis 2020;2020:1382709.
  12. Sadrin S, Sennoune S, Gout B, et al. A 2-strain mixture of Lactobacillus acidophilus in the treatment of irritable bowel syndrome: A placebo-controlled randomized clinical trial. Dig Liver Dis 2020;52(5):534-540. PubMed
  13. Stoffer JN, Slingsby TJ, Giuliari GP. Lactobacillus acidophilus endophthalmitis after intravitreal bevacizumab injection requiring intraocular lens explantation. Can J Ophthalmol 2022;57(1):e21-e22. PubMed
  14. Cukovic-Cavka S, Likic R, Francetic I, Rustemovic N, Opacic M, Vucelic B. Lactobacillus acidophilus as a cause of liver abscess in a NOD2/CARD15-positive patient with Crohn's disease. Digestion 2006;73(2-3):107-10.
  15. Hui J, Ren Y, Wang Y, Han Q. Lactobacillus acidophilus endophthalmitis postcataract operation: A case report with a literature review. Ocul Immunol Inflamm 2023.

See these in context on the Lactobacillus Acidophilus monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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