Drug & supplement interaction

Castoreum + tipranavir

tipranavir brand name: Aptivus.

No Known Interaction

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated June 2026 · Pair last verified Sep 20, 2026

The bottom line No known interaction

We found no known interaction between Castoreum and tipranavir 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. Additionally, although there is no interaction, the label for tipranavir states a food rule worth keeping to.

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Interaction report

Castoreum and tipranavir

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 tipranavir and Castoreum 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 Castoreum at all — not against tipranavir, 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.

Castoreum safety at a glance

Castoreum overall Not established Modern safety data for medicinal use is essentially lacking, so caution is warranted.

Pregnancy Avoid There is no safety data; avoid medicinal use during pregnancy.

Breastfeeding Avoid There is no safety data; avoid medicinal use while breastfeeding.

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

Still wondering about combining tipranavir and Castoreum? Ask Dr. Brian Staiger, PharmD, BCPS directly ›

What to actually watch for

What tipranavir’s Own FDA Label Lists

This is not an interaction — none of it involves Castoreum. These are the most notable effects listed in the ADVERSE REACTIONS section of tipranavir’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 5 of them are worth acting on rather than waiting out — marked below.

Dehydration Worth acting on
Anemia Worth acting on
Shortness of breath Worth acting on
A low white blood cell count Worth acting on
Bleeding or bruising Worth acting on
Weight loss
Vomiting mentioned in 19.9% of FDA reports for tipranavir
Nausea mentioned in 20.5% of FDA reports for tipranavir
Numbness or tingling
Muscle pain

Showing the 10 most notable of 17 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for tipranavir. Read the label on DailyMed › Where a percentage is shown, it is the share of 1,379 voluntary FDA FAERS reports for tipranavir that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Castoreum’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Castoreum side to compare — that is a limit of the record, not a statement that Castoreum has no side effects.

How to take them

Some tipranavir Products Have a Food Rule — Castoreum Should Not Break It

At least one FDA label for a product containing tipranavir says to take it with food. If you take Castoreum on an empty stomach out of habit, keep them separate — and take tipranavir with a meal where the label says to.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two tipranavir products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

( 2.2 ) APTIVUS taken with ritonavir tablets must be taken with meals ( 2.1 ) APTIVUS capsules must be swallowed whole and must not be opened or chewed ( 2.1 ) Children should be assessed for their ability to swallow capsules before prescribing APTIVUS capsules.

From the Dosage and Administration section of the FDA label we read for tipranavir — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

Everything else you take

See Every Supplement That Interacts With tipranavir

This page covers Castoreum only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the tipranavir page lists 212 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), St. John's Wort (major), 1,3-dmaa (moderate) and Acacia Rigidula (moderate).

By severity: 3 major · 165 moderate · 44 minor.

From our pharmacist’s overview on the tipranavir page

“Keeping tipranavir (Aptivus) at a steady blood level is what keeps HIV suppressed, so this is a supplement list that deserves genuine care, and the three major-rated entries come first. St.”

Reviewed by 2 · Jul 18, 2026

Open the tipranavir interaction page

How much people look this up

Where Castoreum and tipranavir 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 Castoreum

Steady interest

#1,073 of 1,452 supplements looked up here in the last 7 days

29 days ago today

Medication tipranavir

Steady interest

#2,328 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. Castoreum 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 Castoreum reference on this page ↓
Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Castoreum and tipranavir 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 Dr. Brian Staiger, PharmD, BCPS.

Supplement

About Castoreum

What is Castoreum?

Traditional remedy for menstrual or 'hysteria' complaints
Folk use for headache and pain
Flavoring agent (vanilla-like notes)
Fragrance and perfume ingredient
Historical use as a sedative or antispasmodic

Castoreum is a brownish, strong-smelling substance taken from the castor sacs of beavers, not a plant. It has a long history in perfumes, flavorings, and folk medicine, but there is no reliable modern evidence that it treats any health condition, so it should not be relied on as a medicine.

Castor sac secretion (castoreum) from beavers, sometimes combined with castor gland and surrounding tissue · Tincture (in traditional and homeopathic medicine), perfume and fragrance ingredient, food flavoring extract

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

Castoreum: dosing

There is no established or standardized medicinal dose for castoreum. It is not a recognized medicine, and reliable dosing guidelines do not exist.If you encounter a product that contains castoreum (for example, a traditional tincture or homeopathic preparation), follow the directions on the label and do not exceed them.

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

Read the full Castoreum monograph & all interactions

Medication

About Tipranavir

What Is Tipranavir Used For?

Brand name: Aptivus

Aptivus (tipranavir) is used to treat HIV-1 infection in adults and in pediatric patients weighing 36 kg or more who have already tried other HIV medications and whose virus has become resistant to more than one protease inhibitor. It must always be taken together with ritonavir to work properly.

Aptivus is not recommended for people who have never been treated for HIV before. It works best when combined with other active HIV medications, and a resistance test is usually done first to confirm the virus will respond to it.

See full Tipranavir drug information

Keep checking

Other Drugs & Castoreum

Browse every other medication we’ve checked against Castoreum — 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 Castoreum 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 Castoreum list.

See the full Castoreum interactions page

See every supplement checked against tipranavir, ranked by severity

Evidence & sources

Castoreum References

The 3 sources that drive our Castoreum monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Castoreum is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

Castoreum (chemical information) — PubChem (NIH National Library of Medicine) Source
Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements Source
Herbal Medicine — MedlinePlus (NIH National Library of Medicine) 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 Castoreum and tipranavir Together: Common Questions

Is it safe to take Castoreum with tipranavir?

We do not list a known interaction between Castoreum and tipranavir. 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.

Should I take Castoreum and tipranavir at the same time of day?

At least one FDA label for a product containing tipranavir says to take it with food. If you take Castoreum on an empty stomach out of habit, keep them separate and take tipranavir with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two tipranavir products can differ — so check the directions on your own box. This is about absorption, not an interaction.

Does tipranavir interact with any supplements?

Yes. tipranavir has documented interactions with 212 supplements in our database — Castoreum is not one of them. The tipranavir 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

Castoreum monograph Uses, safety profile, and every drug interaction in one place Tipranavir drug information The full plain-English guide to this medication tipranavir supplement interactions Every supplement checked against tipranavir, 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 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About tipranavir and Castoreum?

Our pharmacists answer your medication & supplement questions — free.

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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.