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Dietary supplement

Acidophilus Ingredients & Drug Interactions

by UP4

Acidophilus label
See full label image
Capsule Category: Non-nutrient/non-botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Acidophilus 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

Acidophilus is a dietary supplement by UP4 with 1 active ingredient. 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 L. acidophilus DDS(R)-1. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Acidophilus by UP4

Ask about any prescription or over-the-counter medication and we check it for interactions with Acidophilus by UP4 — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Acidophilus by UP4

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

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 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

UP4 Acidophilus is a single-ingredient probiotic capsule containing L. acidophilus DDS(R)-1, a live beneficial bacterium intended to support gut health. The capsule also contains inactive ingredients — rice dextrin, vegetable cellulose, fructooligosaccharide, vegetable magnesium stearate, and silica — which are fillers, binders, and other excipients that hold the probiotic stable.

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: digestive health and probiotic balance.
  • We looked for evidence on: Antibiotic-associated diarrhea, Bacterial vaginosis, Clostridioides difficile infection, Colic, Constipation, Inflammatory bowel disease (IBD) — 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 Constipation, Inflammatory bowel disease (IBD), Lactose intolerance, Necrotizing enterocolitis (NEC).

The data we hold shows L. acidophilus may be helpful for a few conditions. It's rated Possibly Effective for irritable bowel syndrome (IBS), Helicobacter pylori infection, antibiotic-associated diarrhea, and bacterial vaginosis.

For atopic disease (allergic skin and respiratory conditions), the evidence leans toward Possibly Ineffective. For acute respiratory distress syndrome, there isn't enough reliable evidence yet to say either way.

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.

L. acidophilus is generally well tolerated in healthy adults and children. The most common concern with any probiotic is mild gastrointestinal side effects — stomach discomfort, bloating, gas, or diarrhea — but these are uncommon.

There is a rare risk that the live organisms could cause infection in people with a weakened immune system or who are very ill; most documented cases have occurred in patients with serious underlying conditions. Because data are still limited, talk with your doctor or pharmacist before starting, especially if you have a chronic illness or are immunocompromised.

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.

Separate antibiotic use from this probiotic by several hours — antibiotics can reduce its effectiveness by killing the live organisms. Ask your pharmacist how to time them based on your specific antibiotic.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

UP4 Acidophilus is a straightforward probiotic that may help with IBS, diarrhea from antibiotics, or certain bacterial issues. If you take antibiotics, time them away from this supplement so the medication doesn't kill the live organisms.

Check with your pharmacist first if you have a weakened immune system or a serious illness.

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

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Dec 24, 2013.

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 Acidophilus, straight from the product label.

Brand UP4
Net contents 60 Vegetable Capsule(s)
Market status On market
Date entered into DSLD Dec 24, 2013
DSLD ID 28839
Product type Non-nutrient/non-botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Kosher, Halal, Gluten Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Acidophilus by UP4, 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:
1 Capsule(s)
Servings per container
60
IngredientAmount% DV
L. acidophilus DDS(R)-126 mg--

Other ingredients: Rice Dextrin, Vegetable Cellulose, Fructooligosaccharide, Vegetable Magnesium Stearate, Silica

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Formula

We start with exceptionally resilient, scientically validated strains like Lactobacillus acidophilus DDS(R)-1 as a base for all of our formulas.

PROBIOTICS with DDS(R)-1

General Statements

We add additional live cultures that can naturally withstand stomach acid and bile without the need for chemical coatings.

A HAPPIER INSIDE

5 BILLION CFU 2 MONTH SUPPLY ACID & BILE RESISTANT

SUPPORTS DIGESTIVE and IMMUNE HEALTH

~leading ~scientific ~healthy ~trusted UP4 learning more about the art, science and passion that goes into our products?

Laboratory tested to meet strict standards for potency and identity.

MADE IN USA

UP4 health. Our formulas are based on the researched and proven strains that promote the healthy bacteria in your body. With probiotics and your body in balance, the results are a happier inside.

UP4 trust. We stand on our legacy of quality. We’re dedicated to being a leader in the field and guarantee you will always get what is promised on our label. It’s what you’d expect from a company that’s all in for probiotics.

UP4 leading. We’ve been making probiotics in the USA since 1979. And it’s all we do, from creating the formulas and manufacturing to getting our products to you. For us, it’s a science, an art and definitely our passion.

UP4 science. Not all probiotic strains are created equal.

Laboratory tested to meet strict standards for potency and purity. Potency guaranteed at time of expiration.

FDA Statement of Identity

PROBIOTIC SUPPLEMENT

Formulation

NON-DAIRY NON-GMO GLUTEN FREE PRESERVATIVE FREE

VEGAN

SOY FREE PRESERVATIVE FREE

Seals/Symbols

{crescent moon}M(R)

OK D

vitamin angels(R) PROUD SUPPORTER

Suggested/Recommended/Usage/Directions

DIRECTIONS: For best results take 1 capsule per day before or during meals.

Precautions

CAUTION: ~ Do not take if seal is broken

~ Keep out of reach of children

~ As with any supplement, if you are pregnant, nursing, have a medical condition or taking medication, consult your health practitioner before use

Storage

Room temperature stable for two years. Refrigerate after opening.

FDA Disclaimer Statement

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

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

See for yourself

Acidophilus by UP4 label

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

Acidophilus 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 Acidophilus by UP4

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.

L. acidophilus DDS(R)-1

Interacts with
182 drugs
26 mg per serving

Lactobacillus acidophilus is a 'friendly' bacterium used as a probiotic to support gut and vaginal health. It is generally well tolerated in healthy p...

L. acidophilus DDS(R)-1 monograph & interactions

Other (inactive) ingredients: Rice Dextrin, Vegetable Cellulose, Fructooligosaccharide, Vegetable Magnesium Stearate, Silica. These complete the product’s ingredient list but are not active constituents.

Interaction report

Acidophilus by UP4 Drug Interactions

Want to check YOUR meds against Acidophilus?

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

L. acidophilus DDS(R)-1 182

Individual Drug Interactions

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

1 of the 1 ingredient in Acidophilus interact with drugs. Each result below shows which ingredient is responsible. L. acidophilus DDS(R)-1

Each ingredient & the kinds of drugs it affects

For each ingredient in Acidophilus 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.

L. acidophilus DDS(R)-11 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
L. acidophilus DDS(R)-1 full monograph & interactions
The maker

Brand information

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

UP4

See all UP4 products
Name
UASLifeSciences The Probiotic Company(R)
Street Address
555 N 72nd Avenue
City
Wausau
State
WI
ZipCode
54401
Phone Number
715.849.3333
Pharmacist Counseling Corner

Acidophilus by UP4: Common Questions

Does Acidophilus by UP4 interact with any medications?
Yes. Based on its ingredients, Acidophilus 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?
Acidophilus contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this while I'm on antibiotics?
Yes, but not at the same time. Antibiotics kill the live bacteria in probiotics, which defeats the purpose. Space them out — your pharmacist can tell you exactly how many hours apart based on your antibiotic. Many people take the probiotic a few hours after their antibiotic dose.
What is L. acidophilus DDS(R)-1?
It's a strain of Lactobacillus acidophilus, a beneficial bacterium that naturally lives in your gut. This product contains live, active organisms — that's why timing with antibiotics matters and why you may feel mild bloating or gas at first.
Will this help my IBS or diarrhea?
The evidence says it might — L. acidophilus is rated Possibly Effective for both irritable bowel syndrome and antibiotic-associated diarrhea. Results vary by person, so give it a fair trial and talk to your doctor if you don't see improvement.
Is this safe for my kids?
L. acidophilus is generally well tolerated in children, but talk with your pediatrician first. If they have any serious health conditions, that conversation is especially important.
Could this cause side effects?
Most people tolerate it fine, but some experience mild bloating, gas, stomach discomfort, or diarrhea — especially at first. These are uncommon and usually pass. In rare cases, the live organisms could cause infection in people with very weak immune systems; that's another reason to check with your doctor beforehand.
Can I take this if I'm pregnant or breastfeeding?
For pregnancy, the data we hold rates L. acidophilus as Possibly Safe, so it's worth discussing with your OB. We don't have data on safety during breastfeeding, so ask your doctor or lactation consultant for personalized guidance.

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

Not sure if Acidophilus is safe with your meds?

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Ask a pharmacist

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.

Acidophilus label
Go deeper

The Full Monographs Behind Acidophilus’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

Acidophilus'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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