Drug & supplement interaction

Raspberry Ketone + Fosfomycin

Fosfomycin brand name: Monurol.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Raspberry Ketone and Fosfomycin 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.

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Interaction report

Raspberry Ketone and Fosfomycin

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 Fosfomycin and Raspberry Ketone 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.

Raspberry Ketone safety at a glance

Raspberry Ketone overall Use caution Used in foods safely, but human safety data for high supplement doses is very limited.
Pregnancy Avoid Not enough safety information; avoid concentrated supplements during pregnancy.
Breastfeeding Avoid Not enough safety information; avoid supplement use while breastfeeding.

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

Still wondering about combining Fosfomycin and Raspberry Ketone? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Fosfomycin

Interactions in our licensed database are recorded against drug classes, not just single drug names. Fosfomycin is filed under 2 classifications — antibiotic drugs, oral drugs. Raspberry Ketone has documented interactions with 2 drug classes — the most serious being stimulant drugs (moderate) and warfarin (coumadin) (moderate) — and none of Fosfomycin’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.

Keep it in perspective

Raspberry Ketone Does Interact With Other Medications

Raspberry Ketone has 174 moderate known drug interactions in our database — Fosfomycin isn’t one of them. If you take anything else, check it against the full list below.

Moderate 174 No known interaction 2,656 (incl. Fosfomycin)
Taking anything else?

Check Another of Your Medications Against Raspberry Ketone

Covers the 2,830 medications we’ve checked against Raspberry Ketone. Pick one to open its full report.

What to actually watch for

No Interaction Found — But Data Suggests Raspberry Ketone and Fosfomycin May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do. One of them is worth acting on rather than waiting out — marked below.

  • An irregular heartbeat Worth acting on Additional detail

    Raspberry Ketone

    “Structurally, raspberry ketone resembles synephrine, a known stimulant agent. Although not well studied in humans, stimulant-related side effects are possible. Orally, cases of heart palpitations, tachycardia, elevated blood pressure, coronary vasospasm are reported after taking raspberry ketone.”

    Raspberry Ketone · Natural Medicines adverse-effect record, reported in arrhythmia.

    3 sources cited
    1. 17961. Adverse Event Report. Raspberry Ketone. Natural MedWatch, April 27, 2012.
    2. 112386. Ansari SA, Patel F, Ashouri D, Dhaliwal JSS, Desai A. Resistant Polymorphic Ventricular Tachycardia in a Patient Taking Raspberry Ketones Weight Loss Supplement. Cureus 2022;14(12):e33089. PubMed
    3. 112400. Khattar A, Beeton I. Coronary vasospasm and raspberry ketones weight-loss supplement: Is there a connection? Anatol J Cardiol. 2020;24(3):205-208.

    Fosfomycin

    Listed in the ADVERSE REACTIONS section of the FDA label for Fosfomycin. Read the label on DailyMed ›

  • Diarrhea Additional detail

    Raspberry Ketone

    “Structurally, raspberry ketone resembles synephrine, a known stimulant agent. Although not well studied in humans, stimulant-related side effects are possible. Two case reports describe symptoms of sweating, diarrhea, and feelings of shakiness after oral use of raspberry ketone.”

    Raspberry Ketone · Natural Medicines adverse-effect record, reported in diarrhea.

    2 sources cited
    1. 17961. Adverse Event Report. Raspberry Ketone. Natural MedWatch, April 27, 2012.
    2. 112400. Khattar A, Beeton I. Coronary vasospasm and raspberry ketones weight-loss supplement: Is there a connection? Anatol J Cardiol. 2020;24(3):205-208.

    Fosfomycin

    Listed in the ADVERSE REACTIONS section of the FDA label for Fosfomycin. Read the label on DailyMed ›

Reported for Raspberry Ketone but not commonly for Fosfomycin: raised blood pressure, a fast or pounding heartbeat, tremor or shakiness and sweating.

Effects for Fosfomycin come from the ADVERSE REACTIONS section of its FDA label; effects for Raspberry Ketone come from the Natural Medicines adverse-effect record, quoted above. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Everything else you take

See Every Supplement That Interacts With Fosfomycin

This page covers Raspberry Ketone only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Fosfomycin page lists 44 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Bacillus Coagulans (moderate), Bacillus Subtilis (moderate), Bifidobacterium Animalis Subsp. Lactis (moderate) and Bifidobacterium Bifidum (moderate).

By severity: 1 major · 33 moderate · 10 minor.

From our pharmacist’s overview on the Fosfomycin page

“Fosfomycin (Monurol) is often given as a single sachet to knock out a bladder infection, so you get one chance to absorb the full dose, and that is exactly where this list deserves real care. The clearest hazard is activated charcoal, which binds medicines in the gut and can cut how much fosfomycin your body actually takes in.”

Reviewed by 2 · Jul 18, 2026

Open the Fosfomycin interaction page

One more smart check

Taking Raspberry Ketone as Part of a Dietary Supplement Product? Check It for Interactions

We hold 682 real supplement products containing Raspberry Ketone, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Raspberry Ketone. Even though Raspberry Ketone itself has no known interaction with Fosfomycin, 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 Raspberry Ketone and Fosfomycin 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 Raspberry Ketone
Top 25%

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

29 days ago today
Medication Fosfomycin
Steady interest

#2,119 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.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Raspberry Ketone reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Raspberry Ketone and Fosfomycin 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.
Data structure & sourcing designed and verified by .
Supplement

About Raspberry Ketone

What is Raspberry Ketone?

Raspberry Ketone
  • Weight loss
  • Fat burning
  • Boosting metabolism
  • Appetite support
  • General 'fat-burner' supplement

Raspberry ketone is a natural aroma compound found in red raspberries that is heavily marketed for weight loss, but there is no good human evidence that it helps people lose weight. Most claims come from lab and animal studies using doses far higher than what you could get from food or typical supplements. If you choose to try it, talk to your pharmacist or doctor first.

Fruit-derived aromatic compound (4-(4-hydroxyphenyl)butan-2-one) · Capsules, tablets, softgels, powders, often combined with other weight-loss ingredients

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

Raspberry Ketone: dosing

There is no established or proven effective dose of raspberry ketone for weight loss or any other use. The amounts found in supplements vary widely from product to product.If you decide to try it, follow the directions on the product label and do not take more than recommended. Because supplements are not tightly regulated, the actual amount in a product may differ from what is listed, and quality can vary between brands.Before starting, it is a good idea to review the full ingredient list with your pharmacist, especially since many products contain caffeine or other added stimulants.

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

Read the full Raspberry Ketone monograph & all interactions
Medication

About Fosfomycin

What Is Fosfomycin Used For?

Brand name: Monurol

Fosfomycin is an antibiotic used to treat urinary tract infections (UTIs) caused by specific bacteria. The right form depends on how serious the infection is.

Oral forms (Fosfomycin Tromethamine and Monurol) are approved only for uncomplicated UTIs — also called acute cystitis — in women 18 and older, caused by E. coli or Enterococcus faecalis. They are not for kidney infections or abscesses around the kidney. Contepo (intravenous) is approved for adults 18 and older with complicated UTIs, including acute pyelonephritis (kidney infection), caused by susceptible E. coli or Klebsiella pneumoniae.

See full Fosfomycin drug information
Keep checking

Other Drugs & Raspberry Ketone

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

0Major
174Moderate
0Minor
2,655No known interaction
174 Moderate 2,655 No interaction
Moderate

174 interactions

Showing 60 of 174 moderate interactions — see all 174 on the Raspberry Ketone page.

No interaction 2,655 drugs checked — show the list

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

Showing the 60 most looked-up of 2,655 medications checked with no known interaction — see the full Raspberry Ketone list.

See the full Raspberry Ketone interactions page
See every supplement checked against Fosfomycin, ranked by severity
Evidence & sources

Raspberry Ketone References

The 4 references that drive our Raspberry Ketone 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.

  1. Adverse Event Report. Raspberry Ketone. Natural MedWatch, April 27, 2012.
  2. Adverse Event Report. Raspberry Ketone. Natural MedWatch, September 18, 2011.
  3. Ansari SA, Patel F, Ashouri D, Dhaliwal JSS, Desai A. Resistant Polymorphic Ventricular Tachycardia in a Patient Taking Raspberry Ketones Weight Loss Supplement. Cureus 2022;14(12):e33089. PubMed
  4. Khattar A, Beeton I. Coronary vasospasm and raspberry ketones weight-loss supplement: Is there a connection? Anatol J Cardiol. 2020;24(3):205-208.

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 Raspberry Ketone and Fosfomycin Together: Common Questions

Is it safe to take Raspberry Ketone with Fosfomycin?
We do not list a known interaction between Raspberry Ketone and Fosfomycin. 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.
Do Raspberry Ketone and Fosfomycin have any of the same side effects?
Yes — our sources link each of them separately to 2 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
How was the Raspberry Ketone and Fosfomycin combination checked?
Interactions in our licensed database are recorded against drug classes. Fosfomycin is filed under 2 classifications, and Raspberry Ketone has documented interactions with 2 drug classes — none of Fosfomycin's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Raspberry Ketone interact with any other medications?
Yes. Raspberry Ketone has 174 documented drug interactions in our database — Fosfomycin is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Fosfomycin interact with any supplements?
Yes. Fosfomycin has documented interactions with 44 supplements in our database — Raspberry Ketone is not one of them. The Fosfomycin 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

Raspberry Ketone monograph Uses, safety profile, and every drug interaction in one place Fosfomycin drug information The full plain-English guide to this medication Fosfomycin supplement interactions Every supplement checked against Fosfomycin, 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 4 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Fosfomycin and Raspberry Ketone?

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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.