Riboflavin + Rifapentine
Rifapentine brand name: Priftin.
We found no known interaction between Riboflavin and Rifapentine 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 Rifapentine states a food rule worth keeping to, and 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.
Riboflavin and Rifapentine
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 Rifapentine and Riboflavin 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.
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.
Riboflavin safety at a glance
Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Why No Interaction Is Listed for Rifapentine
Interactions in our licensed database are recorded against drug classes, not just single drug names. Rifapentine is filed under 4 classifications — including cytochrome p450 2c9 (cyp2c9) inducers, cytochrome p450 3a4 (cyp3a4) inducers, antibiotic drugs. Riboflavin has documented interactions with 1 drug class — the most serious being tetracycline antibiotics (moderate) — and none of Rifapentine’s classifications are among them.
Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.
Riboflavin Does Interact With Other Medications
Riboflavin has 20 moderate known drug interactions in our database — Rifapentine isn’t one of them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Riboflavin
We haven’t checked that one against Riboflavin yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Riboflavin. Pick one to open its full report.
Riboflavin in Pregnancy & Breastfeeding
When used orally and appropriately in dietary amounts. A tolerable upper intake level (UL) has not been established.
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center
No Interaction — But Rifapentine May Lower Your Riboflavin Levels
These two do not interact. The relationship runs the other way: the licensed record lists Rifapentine as associated with lower Riboflavin levels — rated “Insignificant Depletion”.
Antibiotic drugs might reduce riboflavin levels; however, this is not likely to be clinically significant. Interference with the normal gastrointestinal flora by antibiotics may reduce bacterial synthesis of riboflavin. However, this synthesis doesn't seem to significantly contribute to the body's supply of riboflavin, which is primarily obtained from dietary sources. Riboflavin supplements aren't necessary during antibiotic therapy.
RIBOFLAVIN — Insignificant Depletion
See every medication linked to lower Riboflavin levels · See the full Rifapentine nutrient report
Disclaimer: This checker finds which nutrients might be depleted by prescription or over-the-counter medications. Each nutrient depletion issue is rated based on clinical significance. Use your own professional judgment prior to making clinical decisions.© 2026 Therapeutic Research Center
Some Rifapentine Products Have a Food Rule — Riboflavin Should Not Break It
At least one FDA label for a product containing Rifapentine says to take it with food. If you take Riboflavin on an empty stomach out of habit, keep them separate — and take Rifapentine 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 Rifapentine 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 ) Take with food.
From the Dosage and Administration section of the FDA label we read for Rifapentine — 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.
See Every Supplement That Interacts With Rifapentine
This page covers Riboflavin only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Rifapentine page lists 64 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Alkanna (moderate), Alpine Ragwort (moderate), Bacillus Coagulans (moderate) and Bacillus Subtilis (moderate).
By severity: 1 major · 53 moderate · 10 minor.
From our pharmacist’s overview on the Rifapentine page
“Rifapentine (Priftin) treats tuberculosis and is often dosed just once or twice a week, so a single blunted dose costs more than it would with a daily pill. That is why I read this list of 64 interacting supplements as a real warning rather than routine fine print.”
Reviewed by 2 · Jul 18, 2026
Taking Riboflavin as Part of a Dietary Supplement Product? Check It for Interactions
We hold 18,014 real supplement products containing Riboflavin, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Riboflavin. Even though Riboflavin itself has no known interaction with Rifapentine, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Riboflavin and Rifapentine 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.
#12 of 1,452 supplements looked up here in the last 7 days
#2,049 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 Riboflavin reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Riboflavin and Rifapentine 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 Riboflavin
What is Riboflavin?
- Riboflavin deficiency
- Migraine prevention
- General energy and metabolism support
- Healthy skin and eyes
Riboflavin (vitamin B2) is an essential nutrient your body needs to turn food into energy and to keep skin, eyes, and nerves healthy. It is generally very safe at typical doses, and the strongest evidence supports its use for treating deficiency, with some supportive (but not definitive) evidence for preventing migraines.
Vitamin (water-soluble B vitamin) · Tablets, capsules, softgels, multivitamins, B-complex products, fortified foods
An interaction check asks whether these two react with each other — it does not ask whether Riboflavin is a good idea for someone in your situation. Here is what our Riboflavin record says about it on its own.
Riboflavin: dosing
There is a recommended daily intake for riboflavin as a nutrient, and most people meet it through a normal diet. Do not assume that more is better.
From our Riboflavin monograph — the full record covers uses, side effects and every documented interaction.
About Rifapentine
What Is Rifapentine Used For?
Brand name: Priftin
Rifapentine (brand name Priftin) is used to treat two forms of tuberculosis (TB) caused by Mycobacterium tuberculosis. For active pulmonary TB — an active infection in the lungs — it is approved for patients 12 years and older, always used alongside other TB medicines, never alone. For latent TB infection (LTBI) — where the bacteria are in the body but not causing active illness — it is approved for patients 2 years and older who are at high risk of the infection becoming active, always combined with isoniazid.
Priftin is not appropriate for every TB situation. It should not be used alone at any stage of active TB treatment, and it is not recommended as a once-weekly continuation regimen combined with isoniazid in people living with HIV who have active pulmonary TB, due to a higher risk of treatment failure or relapse.
Most-Reported Side Effects for Rifapentine
From FAERS, the FDA’s public side-effect reporting system (509 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Riboflavin
Browse every other medication we’ve checked against Riboflavin — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
20 interactions
- Doxycycline ›
- Minocycline ›
- Tetracycline ›
- Doxycycline Hyclate ›
- Minocycline Hydrochloride ›
- Retapamulin ›
- Chlortetracycline ›
- Demeclocycline ›
- Doripenem ›
- Doxycycline Monohydrate ›
- Doxycyline ›
- Eravacycline ›
- Omadacycline (iv) ›
- Omadacycline (oral) ›
- Oxytetracycline ›
- Tigecycline ›
- Amphotericin, Tetracycline ›
- Bismuth Subsalicylate, Metronidazole, Tetracycline ›
- Metronidazole, Tetracyline, Bismuth Subcitrate Potassium ›
- Oxytetracycline, Phenazopyridine, Sulfamethizole ›
No interaction 2,809 drugs checked — show the list
We also checked Riboflavin 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 ›
- Metoprolol ›
- Aspirin ›
- Rivaroxaban ›
- Rosuvastatin ›
- Acetaminophen ›
- Escitalopram ›
- Tadalafil ›
- Clopidogrel ›
- Abemaciclib ›
- Atorvastatin ›
- Docusate ›
- Valacyclovir ›
- Hydroxyurea ›
- Ibuprofen ›
- Methamphetamine ›
- Tirzepatide ›
- Semaglutide ›
- Warfarin Sodium ›
- Sumatriptan ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Metformin ›
- Lisinopril ›
- Bupropion ›
- Amoxicillin ›
- Bendamustine ›
- Amitriptyline ›
- Acyclovir ›
- Methotrexate ›
- Fluoxetine ›
- Amphetamine ›
- Lamotrigine ›
- Pregabalin ›
- Acetaminophen, Codeine ›
- Azithromycin ›
- Gabapentin ›
- Dextroamphetamine ›
- Isotretinoin ›
- Clonazepam ›
- Methylene Blue ›
- Omeprazole ›
- Amlodipine Besylate ›
- Quetiapine ›
- Letrozole ›
- Duloxetine ›
- Naproxen ›
- Buspirone ›
- Citalopram ›
- Ciprofloxacin ›
- Bisoprolol ›
Showing the 60 most looked-up of 2,809 medications checked with no known interaction — see the full Riboflavin list.
Riboflavin References
The 5 references that drive our Riboflavin 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.
- Schoenen J, Jacquy J, Lenaerts M. Effectiveness of high-dose riboflavin in migraine prophylaxis. A randomized controlled trial. Neurology 1998;50:466-70. PubMed
- Yates AA, Schlicker SA, Suitor CW. Dietary reference intakes: The new basis for recommendations for calcium and related nutrients, B vitamins, and choline. J Am Diet Assoc 1998;98:699-706. PubMed
- Leeson LJ, Weidenheimer JF. Stability of tetracycline and riboflavin. J Pharm Sci. 1969;58(3):355-7. PubMed
- MacLennan, S. C., Wade, F. M., Forrest, K. M., Ratanayake, P. D., Fagan, E., and Antony, J. High-dose riboflavin for migraine prophylaxis in children: a double-blind, randomized, placebo-controlled trial. J Child Neurol. 2008;23(11):1300-1304.
- Dietary reference intakes (DRIs): estimated average requirements. Food and Nutrition Board, Institute of Medicine, National Academics. https://www.nal.usda.gov/sites/default/files/fnic_uploads//recommended_intakes_individuals.pdf Accessed July 24, 2017.
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.
Rifapentine Is Linked to Lower Levels of 7 Nutrients
Natural Medicines records Rifapentine as a medicine that can lower these. This is not an interaction with Riboflavin — 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 Rifapentine nutrient depletion report ›
Riboflavin is itself a nutrient we track — see which medications may deplete RIBOFLAVIN.
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 Riboflavin and Rifapentine Together: Common Questions
Is it safe to take Riboflavin with Rifapentine?
Do Riboflavin and Rifapentine have any of the same side effects?
Should I take Riboflavin and Rifapentine at the same time of day?
Can Rifapentine lower my Riboflavin levels?
How was the Riboflavin and Rifapentine combination checked?
Does Riboflavin interact with any other medications?
Does Rifapentine 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.