Drug & supplement interaction

Casein Peptides + Enalapril Maleate

Enalapril Maleate brand names: Vasotec, Epaned.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Casein Peptides has a moderate interaction with Enalapril Maleate. Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.

Read the full interaction report
SeverityModerate
LikelihoodProbable
EvidenceB
What do Severity, Likelihood & Evidence mean?
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Interaction report

Casein Peptides and Enalapril Maleate

Here is the interaction we found between these two, with the evidence behind it.

Moderate

ANTIHYPERTENSIVE DRUGS

Why this applies to Enalapril Maleate

Enalapril Maleate falls under ANTIHYPERTENSIVE DRUGS — the group Casein Peptides interacts with.

Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Clinical research shows that some casein peptides, including the lactotripeptides isoleucine-proline-proline (IPP) and valine-proline-proline (VPP), can modestly reduce blood pressure in patients with hypertension.
Severity Moderate Likelihood Probable Evidence B

Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports..

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the thing to know about pairing casein peptides with enalapril (Vasotec, Epaned). Both seem to work on the same enzyme, ACE. Enalapril blocks ACE to relax your blood vessels, and lab studies suggest certain milk peptides (like IPP and VPP) may nudge that same system a little. So if you take them together, you could get a bit more blood pressure lowering than you bargained for.

In real life that might show up as feeling lightheaded, dizzy, or faint, especially when standing up. The added effect is likely modest, and the evidence here is on the weaker side, so it's not a reason to panic. Still, if you want to add these peptides, check with your pharmacist or doctor first and keep an eye on your blood pressure readings.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Cicero AFG, Aubin F, Azais-Braesco V, Borghi C. Do the lactotripeptides isoleucine-proline-proline and valine-proline-proline reduce systolic blood pressure in European subjects? A meta-analysis of randomized controlled trials. Am J Hypertens. 2013;26(3): PubMed
  2. Fekete AA, Givens DA, Lovegrove JA. Casein-derived lactotripeptides reduce systolic and diastolic blood pressure in a meta-analysis of randomised clinical trials. Nutrients. 2015;7(1):659-81. PubMed
  3. Qin LQ, Xu JY, Dong JY, Zhao Y, van Bladeren P, Zhang W. Lactotripeptides intake and blood pressure management: a meta-analysis of randomised controlled clinical trials. Nutr Metab Cardiovasc Dis. 2013;23(5):395-402. PubMed
  4. Turpeinen AM, Järvenpää S, Kautiainen H, Korpela R, Vapaatalo H. Antihypertensive effects of bioactive tripeptides-a random effects meta-analysis. Ann Med. 2013;45(1):51-6. PubMed

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Casein Peptides Also Interacts With Other Medications

Casein Peptides has 171 moderate known drug interactions in our database — the Enalapril Maleate one above is one of them. If you take anything else, check it against the full list below.

Moderate 171 No known interaction 2,659 (incl. Enalapril Maleate)
Taking anything else?

Check Another of Your Medications Against Casein Peptides

Covers the 2,830 medications we’ve checked against Casein Peptides. Pick one to open its full report.

From our Q&A

Questions About Casein Peptides or Enalapril Maleate

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Casein Peptides or Enalapril Maleate, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Enalapril Maleate

This page covers Casein Peptides only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Enalapril Maleate page lists 166 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), American Mistletoe (major), Asarabacca (major) and Siberian Cocklebur (major).

By severity: 6 major · 136 moderate · 24 minor.

From our pharmacist’s overview on the Enalapril Maleate page

“Potassium is the supplement I worry about first with enalapril maleate (Vasotec, Epaned). This ACE inhibitor, used for high blood pressure and heart failure, already makes the body hold onto potassium, so adding more can raise blood levels too far, a problem called hyperkalemia.”

Reviewed by 2 · Jul 18, 2026

Open the Enalapril Maleate interaction page

One more smart check

Taking Casein Peptides as Part of a Dietary Supplement Product? Check It for Interactions

We hold 82 real supplement products containing Casein Peptides, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Casein Peptides. Your product may carry other ingredients that interact with Enalapril Maleate too, on top of Casein Peptides — and those would not show on this page. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Casein Peptides and Enalapril Maleate Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Casein Peptides
Top half

#679 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Enalapril Maleate
Top 5%

#73 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Supplement

About Casein Peptides

What is Casein Peptides?

  • High blood pressure
  • Stress and relaxation
  • Sleep support
  • General wellness/protein supplement

Casein peptides are small protein fragments made from milk casein, often studied for mild blood pressure support and relaxation. The evidence is limited and mostly modest, so they should not replace proven treatments. People with milk allergy should avoid them, and anyone with a health condition should check with a pharmacist or doctor first.

Read the full Casein Peptides monograph & all interactions
Medication

About Enalapril

What Is Enalapril Used For?

Brand names: Vasotec, Epaned

Enalapril treats high blood pressure (hypertension). Lowering blood pressure reduces the risk of strokes and heart attacks.

It also treats symptomatic heart failure. It is used for asymptomatic left ventricular dysfunction (a weak pumping chamber of the heart without symptoms) to slow the development of overt heart failure and reduce hospital stays for heart failure. Enalapril oral solution (including Epaned) is labeled for high blood pressure in adults and children older than one month.

See full Enalapril drug information
Keep checking

Other Drugs & Casein Peptides

Browse every other medication we’ve checked against Casein Peptides — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
171Moderate
0Minor
2,658No known interaction
171 Moderate 2,658 No interaction
Moderate

171 interactions

Showing 60 of 171 moderate interactions — see all 171 on the Casein Peptides page.

No interaction 2,658 drugs checked — show the list

We also checked Casein Peptides against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,658 medications checked with no known interaction — see the full Casein Peptides list.

See the full Casein Peptides interactions page
See every supplement checked against Enalapril Maleate, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

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

Keep exploring
Casein Peptides monograph › Uses, safety, and every drug interaction in one place Enalapril Maleate supplement interactions › Every supplement checked against Enalapril Maleate, ranked by severity Enalapril drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Casein Peptides and Enalapril Maleate Together: Common Questions

Can you take Casein Peptides with Enalapril Maleate?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Casein Peptides and Enalapril Maleate interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Enalapril Maleate and Casein Peptides?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.