Drug & supplement interaction

Smooth Alder + Aspirin, Codeine Phosphate, Phenobarbital

Aspirin, Codeine Phosphate, Phenobarbital brand name: Phenaphen.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Smooth Alder and Aspirin, Codeine Phosphate, Phenobarbital in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first.

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Interaction report

Smooth Alder and Aspirin, Codeine Phosphate, Phenobarbital

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Aspirin, Codeine Phosphate, Phenobarbital and Smooth Alder in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

Worth understanding: our licensed dataset holds no drug-interaction record for Smooth Alder at all — not against Aspirin, Codeine Phosphate, Phenobarbital, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Smooth Alder safety at a glance

Smooth Alder overall Not established There is very little research on its safety in humans, so caution is warranted.
Pregnancy Avoid Safety has not been studied, so it is best avoided during pregnancy.
Breastfeeding Avoid No safety data exists for nursing, so avoid use while breastfeeding.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Aspirin, Codeine Phosphate, Phenobarbital and Smooth Alder? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
Everything else you take

See Every Supplement That Interacts With Aspirin, Codeine Phosphate, Phenobarbital

This page covers Smooth Alder only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Aspirin, Codeine Phosphate, Phenobarbital page lists 352 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: 12 major · 304 moderate · 36 minor.

From our pharmacist’s overview on the Aspirin, Codeine Phosphate, Phenobarbital page

“Alcohol is the entry I would flag first with Phenaphen (aspirin, codeine phosphate, phenobarbital): beer or wine layered onto codeine and phenobarbital can deepen sedation and, at worst, slow breathing. This medication deserves real caution with supplements.”

Reviewed by 2 · Jul 18, 2026

Open the Aspirin, Codeine Phosphate, Phenobarbital interaction page

One more smart check

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

We hold 2 real supplement products containing Smooth Alder, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Smooth Alder. Even though Smooth Alder itself has no known interaction with Aspirin, Codeine Phosphate, Phenobarbital, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Smooth Alder and Aspirin, Codeine Phosphate, Phenobarbital 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 Smooth Alder
Top half

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

29 days ago today
Medication Aspirin, Codeine Phosphate, Phenobarbital
Top 25%

#377 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.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions. Smooth Alder is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Smooth Alder reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Smooth Alder and Aspirin, Codeine Phosphate, Phenobarbital records this page draws on were last updated June 22, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Smooth Alder

What is Smooth Alder?

  • Skin irritation and wounds
  • Sore throat and mouth rinse
  • Digestive complaints
  • Astringent for inflammation
  • Traditional fever remedy

Smooth Alder is a North American shrub used in traditional and folk medicine, mainly as an astringent for skin and mouth complaints. Modern scientific evidence supporting any health benefit is very limited, so it should be used cautiously and never as a substitute for proven treatments.

Alnus serrulata · Betulaceae · Bark, leaves, and sometimes cones · Tea, decoction, tincture, topical wash

An interaction check asks whether these two react with each other — it does not ask whether Smooth Alder is a good idea for someone in your situation. Here is what our Smooth Alder record says about it on its own.

Smooth Alder: dosing

There is no established standardized dose for Smooth Alder. It has been used traditionally as a tea or topical wash made from the bark or leaves, but reliable, tested dosing guidelines do not exist.If you choose to use a product, follow the directions on the label and do not exceed them.

From our Smooth Alder monograph — the full record covers uses, side effects and every documented interaction.

Read the full Smooth Alder monograph & all interactions
Keep checking

Other Drugs & Smooth Alder

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

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

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

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Smooth Alder list.

See the full Smooth Alder interactions page
See every supplement checked against Aspirin, Codeine Phosphate, Phenobarbital, ranked by severity
Evidence & sources

Smooth Alder References

The 2 sources that drive our Smooth Alder monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Smooth Alder is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Herbs at a Glance — NIH NCCIH Source
  2. Herbs and Supplements — MedlinePlus Source

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Smooth Alder and Aspirin, Codeine Phosphate, Phenobarbital Together: Common Questions

Is it safe to take Smooth Alder with Aspirin, Codeine Phosphate, Phenobarbital?
We do not list a known interaction between Smooth Alder and Aspirin, Codeine Phosphate, Phenobarbital. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Does Aspirin, Codeine Phosphate, Phenobarbital interact with any supplements?
Yes. Aspirin, Codeine Phosphate, Phenobarbital has documented interactions with 352 supplements in our database — Smooth Alder is not one of them. The Aspirin, Codeine Phosphate, Phenobarbital interaction page linked on this page lists every one, ranked by severity.

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

Where next

Keep Exploring

Smooth Alder monograph Uses, safety profile, and every drug interaction in one place Aspirin, Codeine Phosphate, Phenobarbital supplement interactions Every supplement checked against Aspirin, Codeine Phosphate, Phenobarbital, 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 References The 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Aspirin, Codeine Phosphate, Phenobarbital and Smooth Alder?

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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.