Drug & supplement interaction

Bach Flower Remedies + Lapatinib

Lapatinib brand name: Tykerb.

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

We found no known interaction between Bach Flower Remedies and Lapatinib 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

Bach Flower Remedies and Lapatinib

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 Lapatinib and Bach Flower Remedies 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.

Bach Flower Remedies safety at a glance

Bach Flower Remedi... overall Use caution Generally low-risk because they are highly diluted, but most products contain alcohol.
Pregnancy Likely Unsafe When used orally. These preparations contain alcohol, which is teratogenic and dangerous for fetal development. Alcohol is also secreted into breast milk and ca... Read the full pregnancy detail
Breastfeeding Likely Unsafe When used orally. These preparations contain alcohol, which is teratogenic and dangerous for fetal development. Alcohol is also secreted into breast milk and ca... 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 Lapatinib and Bach Flower Remedies? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Lapatinib

Interactions in our licensed database are recorded against drug classes, not just single drug names. Lapatinib is filed under 3 classifications — cytochrome p450 3a4 (cyp3a4) inhibitors, cytochrome p450 3a4 (cyp3a4) substrates, oral drugs. Bach Flower Remedies has documented interactions with 2 drug classes — the most serious being disulfiram (antabuse) (major) and metronidazole (flagyl) (moderate) — and none of Lapatinib’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

Bach Flower Remedies Does Interact With Other Medications

Bach Flower Remedies has 1 major, 3 moderate known drug interactions in our database — Lapatinib isn’t one of them. If you take anything else, check it against the full list below.

Major 1 Moderate 3 No known interaction 2,826 (incl. Lapatinib)
Taking anything else?

Check Another of Your Medications Against Bach Flower Remedies

Covers the 2,830 medications we’ve checked against Bach Flower Remedies. Pick one to open its full report.

What to actually watch for

What Lapatinib’s Own FDA Label Lists

This is not an interaction — none of it involves Bach Flower Remedies. These are the most notable effects listed in the ADVERSE REACTIONS section of Lapatinib’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.

  • Diarrhea mentioned in 27.1% of FDA reports for Lapatinib
  • Acne
  • Mouth irritation or sores
  • Tiredness mentioned in 8.5% of FDA reports for Lapatinib
  • Vomiting mentioned in 7.8% of FDA reports for Lapatinib
  • A skin rash mentioned in 6.9% of FDA reports for Lapatinib
  • Nausea mentioned in 10.5% of FDA reports for Lapatinib

From the ADVERSE REACTIONS section of the FDA label for Lapatinib. Read the label on DailyMed › Where a percentage is shown, it is the share of 15,427 voluntary FDA FAERS reports for Lapatinib that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Bach Flower Remedies’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Bach Flower Remedies side to compare — that is a limit of the record, not a statement that Bach Flower Remedies has no side effects.

Special populations

Bach Flower Remedies in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Unsafe

When used orally. These preparations contain alcohol, which is teratogenic and dangerous for fetal development. Alcohol is also secreted into breast milk and can disrupt infant development.

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

Everything else you take

See Every Supplement That Interacts With Lapatinib

This page covers Bach Flower Remedies only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Lapatinib page lists 143 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 · 100 moderate · 40 minor.

From our pharmacist’s overview on the Lapatinib page

“Of the 143 supplements on file for lapatinib (Tykerb), nearly all press on the same point, the CYP3A4 enzyme that clears this HER2-targeted breast cancer drug. That deserves real caution, since lapatinib only works when its blood level stays in range.”

Reviewed by 2 · Jul 18, 2026

Open the Lapatinib interaction page

How much people look this up

Where Bach Flower Remedies and Lapatinib 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 Bach Flower Remedies
Steady interest

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

29 days ago today
Medication Lapatinib
Steady interest

#2,224 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 Bach Flower Remedies reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Bach Flower Remedies and Lapatinib 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 Bach Flower Remedies

What is Bach Flower Remedies?

Bach Flower Remedies
  • Stress and anxiety
  • Emotional balance
  • Fear and worry
  • Low mood
  • Sleep difficulties
  • Coping during stressful events

Bach Flower Remedies are extremely diluted flower preparations promoted to support emotional well-being rather than treat physical illness. High-quality research has not shown they work better than a placebo, but they are generally considered low-risk. The main concern is their alcohol (brandy) content, especially for children, people avoiding alcohol, and during pregnancy or breastfeeding.

Flowers and plant material from various wildflower species · Liquid drops, sprays, and the well-known 'Rescue Remedy' blend

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

Bach Flower Remedies: dosing

There is no scientifically established or standardized dose for Bach Flower Remedies. Avoid taking large amounts, mainly to limit alcohol intake.

From our Bach Flower Remedies monograph — the full record covers uses, side effects and every documented interaction.

Read the full Bach Flower Remedies monograph & all interactions
Medication

About Lapatinib

What Is Lapatinib Used For?

Brand name: Tykerb

Lapatinib tablets — sold under the brand name Tykerb — are used to treat advanced or metastatic breast cancer in patients whose tumors overexpress the HER2 protein. They are always used in combination with another medicine, not alone.

Tykerb is approved in combination with capecitabine for HER2-positive advanced or metastatic breast cancer in patients who have already received prior treatment including an anthracycline, a taxane, and trastuzumab, and whose disease has progressed on trastuzumab. Tykerb is also approved in combination with letrozole for postmenopausal women with hormone receptor-positive, HER2-positive metastatic breast cancer when hormonal therapy is appropriate.

Most-Reported Side Effects for Lapatinib

From FAERS, the FDA’s public side-effect reporting system (15,427 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Diarrhea 4,174 reports
Nausea 1,615 reports
Fatigue 1,305 reports
Vomiting 1,209 reports
Rash 1,061 reports
See full Lapatinib drug information
Keep checking

Other Drugs & Bach Flower Remedies

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

1Major
3Moderate
0Minor
2,825No known interaction
1 Major 3 Moderate 2,825 No interaction
Major

1 interaction

Moderate

3 interactions

No interaction 2,825 drugs checked — show the list

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

Showing the 60 most looked-up of 2,825 medications checked with no known interaction — see the full Bach Flower Remedies list.

See the full Bach Flower Remedies interactions page
See every supplement checked against Lapatinib, ranked by severity
Evidence & sources

Bach Flower Remedies References

The 3 references that drive our Bach Flower Remedies 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. Fraser AG. Pharmacokinetic interactions between alcohol and other drugs. Clin Pharmacokinet 1997;33:79-90. PubMed
  2. Dufour MC. If you drink alcoholic beverages do so in moderation: what does this mean? J Nutr 2001;131:552S-61S. PubMed
  3. Mennella J. Alcohol's effect on lactation. Alcohol Res Health 2001;25:230-4.

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 Bach Flower Remedies and Lapatinib Together: Common Questions

Is it safe to take Bach Flower Remedies with Lapatinib?
We do not list a known interaction between Bach Flower Remedies and Lapatinib. 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.
How was the Bach Flower Remedies and Lapatinib combination checked?
Interactions in our licensed database are recorded against drug classes. Lapatinib is filed under 3 classifications, and Bach Flower Remedies has documented interactions with 2 drug classes — none of Lapatinib'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 Bach Flower Remedies interact with any other medications?
Yes. Bach Flower Remedies has 4 documented drug interactions in our database — Lapatinib 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 Lapatinib interact with any supplements?
Yes. Lapatinib has documented interactions with 143 supplements in our database — Bach Flower Remedies is not one of them. The Lapatinib 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

Bach Flower Remedies monograph Uses, safety profile, and every drug interaction in one place Lapatinib drug information The full plain-English guide to this medication Lapatinib supplement interactions Every supplement checked against Lapatinib, 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 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Lapatinib and Bach Flower Remedies?

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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.