Drug & supplement interaction

Cnidium + Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide

Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide brand name: Ascriptin Codeine #2.

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

Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide falls into 2 drug categories that Cnidium can interact with; the most serious is rated moderate. In laboratory research, cnidium has been shown to have sedative and hypnotic effects, possibly related to constituent coumarins.

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

Cnidium and Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide

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

Why Are There 2 Interactions?

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

Moderate

CNS DEPRESSANTS

1 of 2

Why this applies to Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide

Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide falls under CNS DEPRESSANTS — the group Cnidium interacts with.

In laboratory research, cnidium has been shown to have sedative and hypnotic effects, possibly related to constituent coumarins. Theoretically, cnidium may potentiate the effects of barbiturates, other sedatives, and anxiolytics.
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

This combination product contains codeine, which is an opioid that already slows down your brain and body. Cnidium matters here because of the codeine piece. In lab and animal studies, cnidium (mostly its coumarin compounds) has shown sedative, sleep-promoting effects. Stacked on top of codeine, the worry is simple addition: more drowsiness, foggy thinking, slower breathing, dizziness, or feeling unusually relaxed or out of it.

To be fair, this is theoretical and based only on test-tube and animal research, not on people taking both together, so the real-world risk in humans isn't well proven. Still, I'd play it safe. The aspirin, aluminum, and magnesium parts aren't the concern. Please check with your pharmacist or doctor before pairing the two, and don't drive until you know how you feel.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Sun Y, Yang AWH, Lenon GB. Phytochemistry, ethnopharmacology, pharmacokinetics and toxicology of Cnidium monnieri (L.) Cusson. Int J Mol Sci. 2020;21(3):1006. PubMed
Moderate

ANTICOAGULANT/ANTIPLATELET DRUGS

2 of 2

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

Laboratory research shows that osthol, a constituent of cnidium, inhibits blood clotting and the activity of platelets. Theoretically, cnidium might increase the risk of bleeding when used with antiplatelet or anticoagulant drugs.
Some anticoagulant or antiplatelet drugs include aspirin, clopidogrel (Plavix), dalteparin (Fragmin), enoxaparin (Lovenox), heparin, ticlopidine (Ticlid), warfarin (Coumadin), and others.
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

This combination product contains aspirin, which thins the blood by stopping platelets from sticking together. Cnidium contains a compound called osthole that, in lab and animal studies, also slows down platelets and clotting. So if you pair the two, you could be doubling up on that blood-thinning effect.

What this might look like in real life: easier bruising, nosebleeds, bleeding gums, or bleeding that takes longer to stop. Keep in mind this concern is theoretical and based only on laboratory and animal research, not human studies, so the actual risk for most people is uncertain. Still, since aspirin already affects bleeding, it's worth a quick chat with your pharmacist or doctor before combining them, especially if you take aspirin daily.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Sun Y, Yang AWH, Lenon GB. Phytochemistry, ethnopharmacology, pharmacokinetics and toxicology of Cnidium monnieri (L.) Cusson. Int J Mol Sci. 2020;21(3):1006. 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

Cnidium Also Interacts With Other Medications

Cnidium has 350 moderate known drug interactions in our database — the Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide one above is among them. If you take anything else, check it against the full list below.

Moderate 350 No known interaction 2,480 (incl. Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide)
Taking anything else?

Check Another of Your Medications Against Cnidium

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

Everything else you take

See Every Supplement That Interacts With Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide

This page covers Cnidium only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide page lists 339 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: 1,4-butanediol (major), Activated Charcoal (major), Asarabacca (major), Beer (major) and Danshen (major).

By severity: 11 major · 286 moderate · 42 minor.

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

“A person taking Ascriptin Codeine #2 for pain is getting aspirin, codeine, and two antacids in a single tablet, and the 339 supplement interactions on file deserve real attention before adding anything alongside it. Most of the list splits two ways.”

Reviewed by 2 · Jul 18, 2026

Open the Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interaction page

One more smart check

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

We hold 175 real supplement products containing Cnidium, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Cnidium. Your product may carry other ingredients that interact with Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide too, on top of Cnidium — 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 Cnidium and Aluminum Hydroxide, Aspirin, Codeine Phosphate, 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 Cnidium
Top half

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

29 days ago today
Medication Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide
Steady interest

#1,690 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 Cnidium

What is Cnidium?

Cnidium
  • Skin conditions and itching
  • Erectile dysfunction and low libido
  • Eczema and dermatitis
  • Antifungal or antimicrobial washes
  • Athletic performance
  • General antioxidant support

Cnidium is the dried fruit of an Asian plant long used in traditional Chinese medicine, mostly for skin problems and sexual health. Modern human evidence for these uses is very limited, with most research coming from laboratory and animal studies. Talk with your pharmacist or doctor before using it, and avoid it during pregnancy and breastfeeding.

Read the full Cnidium monograph & all interactions
Keep checking

Other Drugs & Cnidium

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

0Major
350Moderate
0Minor
2,479No known interaction
350 Moderate 2,479 No interaction
Moderate

350 interactions

Showing 60 of 350 moderate interactions — see all 350 on the Cnidium page.

No interaction 2,479 drugs checked — show the list

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

Showing the 60 most looked-up of 2,479 medications checked with no known interaction — see the full Cnidium list.

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

Can you take Cnidium with Aluminum Hydroxide, Aspirin, Codeine Phosphate, 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 Cnidium and Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide?
Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide belongs to more than one drug category, and Cnidium 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 Cnidium and Aluminum Hydroxide, Aspirin, Codeine Phosphate, 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, Codeine Phosphate, Magnesium Hydroxide and Cnidium?

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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.