Collagen Type I (native) + Adefovir
Adefovir brand name: Hepsera.
We found no known interaction between Collagen Type I (native) and Adefovir 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 two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.
Collagen Type I (native) and Adefovir
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 Adefovir and Collagen Type I (native) 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 Collagen Type I (native) at all — not against Adefovir, 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.
Collagen Type I (native) safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
See Every Supplement That Interacts With Adefovir
This page covers Collagen Type I (native) only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Adefovir page lists 28 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Asarabacca (major), Siberian Cocklebur (major), African Wild Potato (moderate) and Aristolochia (moderate).
By severity: 3 major · 15 moderate · 10 minor.
From our pharmacist’s overview on the Adefovir page
“Someone taking adefovir (Hepsera) for hepatitis B is asking a lot of their kidneys already, since the drug can stress them, and that is where the riskiest entries here press. Six of these 28 ingredients, Siberian cocklebur most seriously, can harm the kidneys themselves, and four more block the transporter the kidneys use to clear adef…”
Reviewed by 2 · Jul 18, 2026
Where Collagen Type I (native) and Adefovir 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.
#1,297 of 1,452 supplements looked up here in the last 7 days
#1,737 of 2,830 medications looked up here in the last 7 days
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.
- Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Collagen Type I (native) reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Collagen Type I (native) and Adefovir records this page draws on were last updated July 10, 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.
About Collagen Type I (native)
What is Collagen Type I (native)?
- Skin health and wrinkles
- Joint comfort and arthritis
- Bone strength
- Hair and nail support
- Wound and tissue repair
Type I collagen is the most abundant protein in human skin, bones, and tendons, and it is sold as a supplement to support skin, joints, and bones. 'Native' (undenatured) Type I collagen keeps its natural triple-helix structure rather than being broken down into peptides. Early research is promising for skin and joints, but evidence is still limited, and most products are generally well tolerated.
Skin, bones, tendons, scales, and connective tissue of cows, pigs, fish, or chicken · Powders, capsules, drinks, and undenatured (native) collagen tablets
An interaction check asks whether these two react with each other — it does not ask whether Collagen Type I (native) is a good idea for someone in your situation. Here is what our Collagen Type I (native) record says about it on its own.
Collagen Type I (native): dosing
There is no official standardized dose for native Type I collagen, and the right amount depends on the specific product. Doses used in studies vary widely depending on the form (powder versus tablet) and whether the collagen is native or hydrolyzed.The safest approach is to follow the directions on the product label and not exceed them.
From our Collagen Type I (native) monograph — the full record covers uses, side effects and every documented interaction.
About Adefovir
What Is Adefovir Used For?
Brand name: Hepsera
Adefovir Dipivoxil Tablets and Hepsera are used to treat chronic hepatitis B — a long-term liver infection caused by the hepatitis B virus (HBV) — in patients 12 years of age and older who have signs of active viral replication and either persistently elevated liver enzymes or active liver disease confirmed on biopsy.
The indication covers adults with both HBeAg-positive and HBeAg-negative chronic hepatitis B, including those with lamivudine-resistant hepatitis B virus. In adolescents aged 12 to less than 18, the approval is based on virological and biochemical responses in HBeAg-positive patients with compensated (still-functioning) liver disease.
Other Drugs & Collagen Type I (native)
Browse every other medication we’ve checked against Collagen Type I (native) — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
No interaction 2,829 drugs checked — show the list
We also checked Collagen Type I (native) against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Testosterone ›
- Losartan Potassium ›
- Ivermectin ›
- Abemaciclib ›
- Aspirin ›
- Metoprolol ›
- Acetaminophen ›
- Rosuvastatin ›
- Rivaroxaban ›
- Escitalopram ›
- Clopidogrel ›
- Atorvastatin ›
- Tadalafil ›
- Docusate ›
- Tirzepatide ›
- Ibuprofen ›
- Methamphetamine ›
- Hydroxyurea ›
- Warfarin Sodium ›
- Valacyclovir ›
- Sumatriptan ›
- Semaglutide ›
- Prednisone ›
- Lisdexamfetamine ›
- Propranolol ›
- Metformin ›
- Amitriptyline ›
- Amoxicillin ›
- Lisinopril ›
- Isotretinoin ›
- Amlodipine Besylate ›
- Methotrexate ›
- Bendamustine ›
- Bupropion ›
- Amphetamine ›
- Fluoxetine ›
- Doxycycline ›
- Acyclovir ›
- Azithromycin ›
- Lamotrigine ›
- Pregabalin ›
- Dextroamphetamine ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Quetiapine ›
- Clonazepam ›
- Levothyroxine, Liothyronine ›
- Naproxen ›
- Omeprazole ›
- Letrozole ›
- Methylene Blue ›
- Duloxetine ›
- Buspirone ›
- Citalopram ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Collagen Type I (native) list.
Collagen Type I (native) References
The 1 references that drive our Collagen Type I (native) monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.
- Stancík R, Zvarka J, Hlavác M, Kubinec V, Rovenský J. Collagen type I in the treatment of painful osteoarthritis of the knee. Reumatologia. 2012;50(5):390-6. DOI
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.
Adefovir Is Linked to Lower Levels of 3 Nutrients
Natural Medicines records Adefovir as a medicine that can lower these. This is not an interaction with Collagen Type I (native) — it is a separate effect of the medicine, and it is a reason some people are advised to supplement rather than to avoid one:
Read the full Adefovir nutrient depletion report ›
Depletion records come from the licensed Natural Medicines database. Do not start a supplement on the strength of this page — ask your pharmacist or doctor whether it applies to you.
Taking Collagen Type I (native) and Adefovir Together: Common Questions
Is it safe to take Collagen Type I (native) with Adefovir?
Do Collagen Type I (native) and Adefovir have any of the same side effects?
Does Adefovir interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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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.