Drug & supplement interaction

Magnesium + Aluminum Hydroxide, Aspirin, Magnesium Hydroxide

Aluminum Hydroxide, Aspirin, Magnesium Hydroxide brand name: Ascriptin.

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

Aluminum Hydroxide, Aspirin, Magnesium Hydroxide falls into 2 drug categories that Magnesium can interact with; the most serious is rated moderate. Use of acid reducers may reduce the laxative effect of magnesium oxide.

Read the full interaction report
SeverityModerate
LikelihoodPossible
Interactions2
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Magnesium and Aluminum Hydroxide, Aspirin, Magnesium Hydroxide

These two interact in 2 distinct ways. Each one is explained separately below.

Why Are There 2 Interactions?

Magnesium interacts with whole categories of medication. Aluminum Hydroxide, Aspirin, Magnesium Hydroxide falls into 2 of those categories, so it can interact with Magnesium in 2 different ways. We’ve listed each one below — your overall risk is driven by the most serious of them (Moderate).

Moderate

ANTACIDS

1 of 2

Why this applies to Aluminum Hydroxide, Aspirin, Magnesium Hydroxide

Aluminum Hydroxide, Aspirin, Magnesium Hydroxide falls under ANTACIDS — the group Magnesium interacts with.

Use of acid reducers may reduce the laxative effect of magnesium oxide.
A retrospective analysis shows that, in the presence of H2 receptor antagonists (H2RAs) or proton pump inhibitors (PPIs), a higher dose of magnesium oxide is needed for a laxative effect. This may also occur with antacids. Under acidic conditions, magnesium oxide is converted to magnesium chloride and then to magnesium bicarbonate, which has an osmotic laxative effect. By reducing acidity, antacids may reduce the conversion of magnesium oxide to the active bicarbonate salt.
Severity Moderate Likelihood Possible Evidence D

Interaction 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.

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

Here's a small thing worth knowing if you take a magnesium oxide supplement and reach for this aspirin product, which contains the antacids aluminum hydroxide and magnesium hydroxide. Magnesium oxide needs stomach acid to turn into the form that actually loosens the bowels. Because the antacids in this combo neutralize some of that acid, your magnesium supplement may simply work less well as a stool softener. So if you were counting on magnesium for occasional constipation, you might notice it doesn't do as much.

This is mild and based mostly on anecdotal reports, so it's nothing to panic about. It does not make the aspirin or the magnesium dangerous. If your magnesium seems less effective, just mention it to your pharmacist before changing anything.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Yamasaki M, Funakoshi S, Matsuda S, Imazu T, Takeda Y, Murakami T, Maeda Y. Interaction of magnesium oxide with gastric acid secretion inhibitors in clinical pharmacotherapy. Eur J Clin Pharmacol 2014;70(8):921-4. PubMed
Minor

ANTICOAGULANT/ANTIPLATELET DRUGS

2 of 2

Aluminum Hydroxide, Aspirin, Magnesium Hydroxide also falls under ANTICOAGULANT/ANTIPLATELET DRUGS.

Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
In vitro evidence shows that magnesium sulfate inhibits platelet aggregation, even at low concentrations. Some preliminary clinical evidence shows that infusion of magnesium sulfate increases bleeding time by 48% and reduces platelet activity. However, other clinical research shows that magnesium does not affect platelet aggregation, although inhibition of platelet-dependent thrombosis can occur.
Severity Minor Likelihood Unlikely Evidence B

Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans..

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

Here's a fun wrinkle: the product you asked about (Ascriptin) already contains magnesium hydroxide as an antacid, alongside aspirin. So adding a separate magnesium supplement on top of it is the real question. The concern on file is that magnesium might have a mild blood-thinning effect of its own, and aspirin is already a platelet blocker. In theory, stacking the two could nudge your bleeding risk up a bit.

That said, the evidence here is weak and conflicting, so I wouldn't lose sleep over it. Just keep an eye out for things like easy bruising, nosebleeds, or stomach upset, since aspirin can irritate the stomach too. If you're on daily aspirin and take magnesium regularly, it's worth a quick chat with your pharmacist.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Ravn HB, Vissinger H, Kristensen SD, et al. Magnesium inhibits platelet activity--an in vitro study. Thromb Haemost. 1996;76(1):88-93. DOI
  2. Ravn HB, Kristensen SD, Vissinger H, et al. Magnesium inhibits human platelets. Blood Coagul Fibrinolysis. 1996;7(2):241-4. PubMed
  3. Ravn HB, Vissinger H, Kristensen SD, et al. Magnesium inhibits platelet activity--an infusion study in healthy volunteers. Thromb Haemost. 1996;75(6):939-44. DOI
  4. Shechter, M., Merz, C. N., Paul-Labrador, M., Meisel, S. R., Rude, R. K., Molloy, M. D., Dwyer, J. H., Shah, P. K., and Kaul, S. Beneficial antithrombotic effects of the association of pharmacological oral magnesium therapy with aspirin in coronary heart

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

Magnesium Also Interacts With Other Medications

Magnesium has 6 major, 174 moderate, 114 minor known drug interactions in our database — the Aluminum Hydroxide, Aspirin, Magnesium Hydroxide one above is among them. If you take anything else, check it against the full list below.

Major 6 Moderate 174 Minor 114 No known interaction 2,536 (incl. Aluminum Hydroxide, Aspirin, Magnesium Hydroxide)
Taking anything else?

Check Another of Your Medications Against Magnesium

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

From our Q&A

Questions About Magnesium or Aluminum Hydroxide, Aspirin, Magnesium Hydroxide

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Magnesium or Aluminum Hydroxide, Aspirin, Magnesium Hydroxide, 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 Aluminum Hydroxide, Aspirin, Magnesium Hydroxide

This page covers Magnesium only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Aluminum Hydroxide, Aspirin, Magnesium Hydroxide page lists 255 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Asarabacca (major), Beer (major), Danshen (major) and Piracetam (major).

By severity: 7 major · 211 moderate · 37 minor.

From our pharmacist’s overview on the Aluminum Hydroxide, Aspirin, Magnesium Hydroxide page

“Ascriptin combines aspirin with two antacids, aluminum hydroxide and magnesium hydroxide, and the aspirin part already thins the blood on its own. That is why more than 200 of the 255 ingredients listed here can raise bleeding risk, and why this page deserves a careful read rather than a quick skim.”

Reviewed by 2 · Jul 18, 2026

Open the Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interaction page

One more smart check

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

We hold 29,717 real supplement products containing Magnesium, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Magnesium. Your product may carry other ingredients that interact with Aluminum Hydroxide, Aspirin, Magnesium Hydroxide too, on top of Magnesium — 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 Magnesium and Aluminum Hydroxide, Aspirin, Magnesium Hydroxide 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 Magnesium
Top 10

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

29 days ago today
Medication Aluminum Hydroxide, Aspirin, Magnesium Hydroxide
Top 1%

#14 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 Magnesium

What is Magnesium?

Magnesium
  • Preventing or treating magnesium deficiency
  • Constipation
  • Muscle cramps
  • Sleep support
  • Anxiety and stress
  • Migraine prevention

Magnesium is an essential mineral your body needs for muscles, nerves, blood pressure, and many other functions, and supplements are useful for preventing or correcting deficiency. Some other uses, like easing constipation or preventing migraines, have reasonable support, while uses for sleep and anxiety are less proven. It is generally safe for most healthy people at recommended amounts, but talk to your pharmacist or doctor before starting, especially if you have kidney problems.

Read the full Magnesium monograph & all interactions
Medication

About Aspirin

What Is Aspirin Used For?

Brand name: Ascriptin

Aspirin is used to temporarily relieve minor aches and pains from headaches, backaches, muscle aches, toothaches, menstrual cramps, the common cold, and minor arthritis pain. It also temporarily reduces fever.

Some coated aspirin tablet products note that, under a doctor's supervision, aspirin can help prevent another heart attack or stroke in adults who have already had one. Because of their delayed-release design, those coated products will not give fast relief for headaches or other symptoms needing quick relief.

See full Aspirin drug information
Keep checking

Other Drugs & Magnesium

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

6Major
174Moderate
114Minor
2,535No known interaction
6 Major 174 Moderate 114 Minor 2,535 No interaction
Major

6 interactions

Moderate

174 interactions

Showing 60 of 174 moderate interactions — see all 174 on the Magnesium page.

Minor

114 interactions

Showing 60 of 114 minor interactions — see all 114 on the Magnesium page.

No interaction 2,535 drugs checked — show the list

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

Showing the 60 most looked-up of 2,535 medications checked with no known interaction — see the full Magnesium list.

See the full Magnesium interactions page
See every supplement checked against Aluminum Hydroxide, Aspirin, Magnesium Hydroxide, 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
Magnesium monograph › Uses, safety, and every drug interaction in one place Aluminum Hydroxide, Aspirin, Magnesium Hydroxide supplement interactions › Every supplement checked against Aluminum Hydroxide, Aspirin, Magnesium Hydroxide, ranked by severity Aspirin 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 Magnesium and Aluminum Hydroxide, Aspirin, Magnesium Hydroxide Together: Common Questions

Can you take Magnesium with Aluminum Hydroxide, Aspirin, Magnesium Hydroxide?
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.
Why are there 2 interactions listed for Magnesium and Aluminum Hydroxide, Aspirin, Magnesium Hydroxide?
Aluminum Hydroxide, Aspirin, Magnesium Hydroxide belongs to more than one drug category, and Magnesium interacts with each of those categories a little differently. We list every one so nothing is missed — your overall risk is driven by the most serious of them.
How serious is the Magnesium and Aluminum Hydroxide, Aspirin, Magnesium Hydroxide 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 Aluminum Hydroxide, Aspirin, Magnesium Hydroxide and Magnesium?

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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.