Drug & supplement interaction

6-bromo + Cobimetinib Fumarate

Cobimetinib Fumarate brand name: Cotellic.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 27, 2026
The bottom line No known interaction

We found no known interaction between 6-bromo and Cobimetinib Fumarate 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.

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Interaction report

6-bromo and Cobimetinib Fumarate

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 Cobimetinib Fumarate and 6-bromo 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 6-bromo at all — not against Cobimetinib Fumarate, 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.

6-bromo safety at a glance

6-bromo overall Use caution This is a hormone-altering compound with limited human safety data and real potential for harm.
Pregnancy Possibly Unsafe When used orally or parenterally. The U.S. Food and Drug Administration and other regulatory agencies warn that dietary supplements containing aromatase inhibit... Read the full pregnancy detail
Breastfeeding Possibly Unsafe When used orally or parenterally. The U.S. Food and Drug Administration and other regulatory agencies warn that dietary supplements containing aromatase inhibit... Read the full breastfeeding detail

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.

Still wondering about combining Cobimetinib Fumarate and 6-bromo? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Cobimetinib Fumarate’s Own FDA Label Lists

This is not an interaction — none of it involves 6-bromo. These are the most notable effects listed in the ADVERSE REACTIONS section of Cobimetinib Fumarate’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. 10 of them are worth acting on rather than waiting out — marked below.

  • Severe muscle breakdown Worth acting on
  • Low sodium Worth acting on
  • Low potassium Worth acting on
  • Heart failure Worth acting on
  • Kidney problems Worth acting on
  • Anemia Worth acting on
  • Raised blood pressure Worth acting on
  • Shortness of breath Worth acting on
  • A low white blood cell count Worth acting on
  • Liver problems Worth acting on

Showing the 10 most notable of 26 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 Cobimetinib Fumarate. Read the label on DailyMed › 6-bromo’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no 6-bromo side to compare — that is a limit of the record, not a statement that 6-bromo has no side effects.

Special populations

6-bromo in Pregnancy & Breastfeeding

Pregnancy And Lactation Possibly Unsafe

When used orally or parenterally. The U.S. Food and Drug Administration and other regulatory agencies warn that dietary supplements containing aromatase inhibitors are dangerous. Avoid using.

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

From our Q&A

Questions About 6-bromo or Cobimetinib Fumarate

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers 6-bromo or Cobimetinib Fumarate, 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:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Cobimetinib Fumarate

This page covers 6-bromo only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Cobimetinib Fumarate page lists 138 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), Acacia Rigidula (moderate) and Adrafinil (moderate).

By severity: 3 major · 94 moderate · 41 minor.

From our pharmacist’s overview on the Cobimetinib Fumarate page

“If you are on cobimetinib (Cotellic) for melanoma, be strict about supplements, because this list carries real weight. The drug is cleared by the liver enzyme CYP3A4, and nearly all 138 flagged ingredients can push its blood level up or down through that pathway.”

Reviewed by 2 · Jul 18, 2026

Open the Cobimetinib Fumarate interaction page

How much people look this up

Where 6-bromo and Cobimetinib Fumarate 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 6-bromo
Steady interest

#1,265 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Cobimetinib Fumarate
Top 25%

#385 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 6-bromo reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 27, 2026. The 6-bromo and Cobimetinib Fumarate 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 .
Supplement

About 6-bromo

What is 6-bromo?

  • Lowering estrogen (aromatase inhibition)
  • Raising or supporting testosterone
  • Reducing estrogen-related side effects during steroid or prohormone cycles
  • Bodybuilding 'post-cycle therapy' attempts

6-Bromo (often sold as 6-bromoandrostenedione) is a synthetic steroid-derived compound marketed as an aromatase inhibitor to lower estrogen and support testosterone, mostly within the bodybuilding community. There is very little reliable human research to confirm it works or is safe, and as a hormone-altering agent it carries real risks. It is banned in sports and should not be used without medical supervision.

Not applicable (synthetic steroidal compound) · Capsules, tablets, liquid suspensions

An interaction check asks whether these two react with each other — it does not ask whether 6-bromo is a good idea for someone in your situation. Here is what our 6-bromo record says about it on its own.

6-bromo: dosing

There is no established or medically recommended dose for 6-Bromo. It has not gone through the kind of testing that would let anyone confidently say how much is safe or effective.Products vary in strength and quality, so if a label gives an amount, that does not mean it has been proven safe.

From our 6-bromo monograph — the full record covers uses, side effects and every documented interaction.

Read the full 6-bromo monograph & all interactions
Medication

About Cobimetinib

What Is Cobimetinib Used For?

Brand name: Cotellic

Cotellic (cobimetinib) is used in two ways. First, it treats adults with unresectable (cannot be surgically removed) or metastatic (spread to other parts of the body) melanoma that carries a BRAF V600E or V600K gene mutation — but only in combination with vemurafenib, another cancer drug. A tumor test must confirm the BRAF mutation before starting this combination.

Second, Cotellic is used on its own as a single agent to treat adults with histiocytic neoplasms, a group of rare cancers involving immune cells called histiocytes.

See full Cobimetinib drug information
Keep checking

Other Drugs & 6-bromo

Browse every other medication we’ve checked against 6-bromo — 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 6-bromo 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 6-bromo list.

See the full 6-bromo interactions page
See every supplement checked against Cobimetinib Fumarate, ranked by severity
Evidence & sources

6-bromo References

The 1 references that drive our 6-bromo 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. Joseph JF, Parr MK. Synthetic androgens as designer supplements. Curr Neuropharmacol. 2015;13(1):89-100. PubMed

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 6-bromo and Cobimetinib Fumarate Together: Common Questions

Is it safe to take 6-bromo with Cobimetinib Fumarate?
We do not list a known interaction between 6-bromo and Cobimetinib Fumarate. 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.
Does Cobimetinib Fumarate interact with any supplements?
Yes. Cobimetinib Fumarate has documented interactions with 138 supplements in our database — 6-bromo is not one of them. The Cobimetinib Fumarate 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

6-bromo monograph Uses, safety profile, and every drug interaction in one place Cobimetinib drug information The full plain-English guide to this medication Cobimetinib Fumarate supplement interactions Every supplement checked against Cobimetinib Fumarate, 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Cobimetinib Fumarate and 6-bromo?

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.