Drug & supplement interaction

Cabbage Soup Diet + 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 Cabbage Soup Diet 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

Cabbage Soup Diet 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 Cabbage Soup Diet in our sources. This does not guarantee that the combination is completely free of risk — research on Cabbage Soup Diet alongside specific medications may be limited.

Worth understanding: our licensed dataset holds no drug-interaction record for Cabbage Soup Diet at all — not against Lapatinib, 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.

Cabbage Soup Diet is an eating pattern rather than something you take. Ask your pharmacist or doctor before changing how you eat while on a prescribed medicine: some medicines are dosed around meals, and a change in diet can change how they work. 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.

Cabbage Soup Diet safety at a glance

Cabbage Soup Diet overall Use caution It is very low in calories and nutrients and is only meant for a short time, so it is not suitable for everyone.
Pregnancy Avoid Pregnancy needs steady, balanced nutrition, so this very low-calorie diet should be avoided.
Breastfeeding Avoid Nursing mothers need adequate calories and nutrients, so this restrictive diet should be avoided.

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

Still wondering about combining Lapatinib and Cabbage Soup Diet? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Lapatinib’s Own FDA Label Lists

This is not an interaction — none of it involves Cabbage Soup Diet. 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 follow Cabbage Soup Diet and take the medicine.

  • 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. Cabbage Soup Diet’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Cabbage Soup Diet side to compare — that is a limit of the record, not a statement that Cabbage Soup Diet has no side effects.

Everything else you take

See Every Supplement That Interacts With Lapatinib

This page covers Cabbage Soup Diet 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 Cabbage Soup Diet 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 Cabbage Soup Diet
Steady interest

#1,413 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Lapatinib
Steady interest

#2,248 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. Cabbage Soup Diet is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Cabbage Soup Diet reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Cabbage Soup Diet and Lapatinib records this page draws on were last updated June 20, 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 .
Eating pattern

About Cabbage Soup Diet

What is Cabbage Soup Diet?

  • Rapid short-term weight loss
  • Quick jump-start before an event
  • Detox or cleanse beliefs
  • Kickstarting a longer diet

The Cabbage Soup Diet is a very low-calorie, 7-day fad diet built around eating large amounts of a cabbage-based soup. It may cause quick water and weight loss, but the loss is usually temporary, the diet is not nutritionally balanced, and most people regain the weight. It is not a healthy long-term plan, and people should talk to a doctor or pharmacist before trying it.

Homemade cabbage-based soup eaten as part of a fixed 7-day meal plan

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

Cabbage Soup Diet: dosing

There is no official or standardized version of the Cabbage Soup Diet. Most plans last about 7 days, with unlimited cabbage soup plus a short list of allowed foods that changes each day.Because the diet is not nutritionally balanced, experts advise against following it longer than a week or repeating it back-to-back.

From our Cabbage Soup Diet monograph — the full record covers uses, side effects and every documented interaction.

Read the full Cabbage Soup Diet 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 & Cabbage Soup Diet

Browse every other medication we’ve checked against Cabbage Soup Diet — 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 Cabbage Soup Diet 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 Cabbage Soup Diet list.

See the full Cabbage Soup Diet interactions page
See every supplement checked against Lapatinib, ranked by severity
Evidence & sources

Cabbage Soup Diet References

The 2 sources that drive our Cabbage Soup Diet monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Cabbage Soup Diet is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Cabbage Soup Diet — MedlinePlus (NIH) Source
  2. Healthy Weight Loss — CDC Source

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

Following Cabbage Soup Diet While Taking Lapatinib: Common Questions

Is it safe to follow Cabbage Soup Diet while taking Lapatinib?
We do not list a known interaction between Cabbage Soup Diet 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.
Does Lapatinib interact with any supplements?
Yes. Lapatinib has documented interactions with 143 supplements in our database — Cabbage Soup Diet 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

Cabbage Soup Diet 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 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Lapatinib and Cabbage Soup Diet?

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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.