Collagen Type I (native) + Valacyclovir
Valacyclovir brand name: Valtrex.
We found no known interaction between Collagen Type I (native) and Valacyclovir 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.
Collagen Type I (native) and Valacyclovir
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 Valacyclovir 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 Valacyclovir, 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.
Questions About Collagen Type I (native) or Valacyclovir
These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Collagen Type I (native) or Valacyclovir, 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:
- Provitalize With Levothyroxine, Valacyclovir, and Citalopram ›
- Is Valacyclovir Safe To Take With Acetaminophen And Guaifenesin? ›
- Alternatives To Valtrex For The Treatment Of Herpes ›
Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.
See Every Supplement That Interacts With Valacyclovir
This page covers Collagen Type I (native) only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Valacyclovir page lists 27 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), African Wild Potato (moderate), Banderol (moderate), Biofeedback (moderate) and Caffeic Acid (moderate).
By severity: 1 major · 17 moderate · 9 minor.
From our pharmacist’s overview on the Valacyclovir page
“Valacyclovir (Valtrex) works against herpes outbreaks only if enough of it gets absorbed into your blood, and most of this list threatens exactly that. Of the 27 supplements on file, 17 can change how well oral medicines like this one are absorbed, and the single major-rated entry, activated charcoal, binds drugs in the gut outright.”
Reviewed by 2 · Jul 18, 2026
Where Collagen Type I (native) and Valacyclovir 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.
#1,353 of 1,452 supplements looked up here in the last 7 days
#31 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 13, 2026. The Collagen Type I (native) and Valacyclovir 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 Valacyclovir
What Is Valacyclovir Used For?
Brand name: Valtrex
Valacyclovir tablets are used in adults to treat cold sores (herpes labialis), genital herpes (initial and recurrent episodes), and shingles (herpes zoster). They can also be taken daily as suppressive therapy to reduce how often genital herpes outbreaks occur, and to lower the risk of passing genital herpes to a partner.
In children and adolescents, valacyclovir tablets are used to treat cold sores in those aged 12 and older, and chickenpox in those aged 2 to under 18. Valacyclovir has not been established as safe and effective for most uses in immunocompromised patients, with the exception of suppressive therapy for genital herpes in HIV-infected adults.
Most-Reported Side Effects for Valacyclovir
From FAERS, the FDA’s public side-effect reporting system (70,056 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
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 ›
- Metoprolol ›
- Aspirin ›
- Ivermectin ›
- Rivaroxaban ›
- Rosuvastatin ›
- Escitalopram ›
- Tadalafil ›
- Acetaminophen ›
- Clopidogrel ›
- Atorvastatin ›
- Docusate ›
- Hydroxyurea ›
- Abemaciclib ›
- Methamphetamine ›
- Ibuprofen ›
- Sumatriptan ›
- Semaglutide ›
- Tirzepatide ›
- Warfarin Sodium ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Acyclovir ›
- Bupropion ›
- Metformin ›
- Amoxicillin ›
- Lisinopril ›
- Bendamustine ›
- Amitriptyline ›
- Doxycycline ›
- Lamotrigine ›
- Fluoxetine ›
- Methotrexate ›
- Acetaminophen, Codeine ›
- Gabapentin ›
- Amphetamine ›
- Pregabalin ›
- Isotretinoin ›
- Dextroamphetamine ›
- Azithromycin ›
- Clonazepam ›
- Quetiapine ›
- Omeprazole ›
- Amlodipine Besylate ›
- Methylene Blue ›
- Duloxetine ›
- Letrozole ›
- Buspirone ›
- Citalopram ›
- Ciprofloxacin ›
- Naproxen ›
- Bisoprolol ›
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.
Taking Collagen Type I (native) and Valacyclovir Together: Common Questions
Is it safe to take Collagen Type I (native) with Valacyclovir?
Does Valacyclovir interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Keep Exploring
Still Have a Question About Valacyclovir and Collagen Type I (native)?
Our pharmacists answer your medication & supplement questions — free.
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.