What is Lapatinib ditosylate used for?
Advanced or metastatic HER2-positive breast cancer, in planned combination treatment Hormone-receptor-positive, HER2-positive metastatic breast cancer in postmenopausal women, with letrozole
HER2-positive breast cancer. Prescription-led referral enquiry only. A listing does not confirm availability, a dispensing pharmacy or a dispensing country.
In simple terms
Lapatinib is a kinase inhibitor. It blocks HER2 and EGFR proteins, which can send growth signals in some breast cancer cells.
Lapatinib ditosylate at a glance
- Generic name
- Lapatinib ditosylate
- Brand names
- Tykerb, Lapatinib
- Strengths
- 250 mg
- Dosage form
- Tablet
- Prescription
- Required
- Last medically reviewed
- 15 August 2026
A catalogue brand reference does not confirm the manufacturer, pack, source or availability for an individual enquiry. The dispensing location is confirmed only if an enquiry can proceed. Confirm any proposed substitution with the treating oncology team.
Cite this pageMedrack. Lapatinib ditosylate: brand names, strengths and dosage form. https://medrack.health/products/lapatinib/. Last medically reviewed 15 August 2026.
How it may be prescribed
Taken by mouth once a day on an empty stomach, at least 1 hour before or 1 hour after food, exactly as the oncologist prescribes. The tablets are taken together as one daily dose and should not be split across the day.
Possible side effects to discuss with the care team
- Diarrhoea
- Hand-foot skin reaction or rash
- Nausea, vomiting or tiredness
- Mouth soreness or loss of appetite
Specialist supervision with liver-function monitoring is required because serious liver problems can occur. The care team also monitors heart function and heart rhythm, and should assess new cough or breathlessness. Tell the team about all medicines, including supplements. Supplied only against a valid specialist prescription.
Common questions about Lapatinib ditosylate
Is generic Lapatinib ditosylate genuine medicine?
Yes. Medrack refers only licensed medicine from a controlled supply chain, either the originator brand or a licensed branded generic from an established manufacturer. It is not an unbranded or unverified copy. The exact brand, manufacturer and pack are confirmed at the enquiry stage, and any proposed medicine should be reviewed with the treating oncology team.
Can I enquire about Lapatinib ditosylate for a parent or family member?
Yes. Many enquiries are sent by family members, including relatives who pay from abroad while the patient is at home. The prescription must be issued in the patient's name, and every case is assessed for the patient. The caregiver checklist in the guides section sets out what to have ready.
What should the prescription for Lapatinib ditosylate show?
The medicine name, the strength and the form, for example Lapatinib ditosylate 250 mg, written by the treating clinician in the patient's name. Keep a clear photo or copy of the whole prescription. The guide on reading a cancer medicine prescription explains each part in simple terms.
What happens after I send an enquiry?
The prescription and medicine details are checked first. If the enquiry can proceed, a referral with written terms is prepared for you to review. You confirm and pay only after you have seen those terms, and dispatch follows what they set out. Sending an enquiry does not create an order or confirm availability.
Is Lapatinib ditosylate right for the patient's cancer?
That is a decision for the treating oncology team, not for this website. Medrack does not advise on treatment choice, dose or suitability, and nothing on this page is medical advice. Where Lapatinib ditosylate has already been prescribed, this page explains the medicine and how to send an access enquiry.
Do I need a prescription for Lapatinib ditosylate?
Yes. Lapatinib ditosylate is a prescription medicine. You can start an enquiry before you have the prescription in hand, but nothing proceeds until a current prescription issued in the patient's name has been received and checked. You upload it privately as part of the enquiry.
What happens after you enquire
Every enquiry is assessed individually. A listing on this page does not confirm availability, a dispensing pharmacy or a delivery.
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You send an enquiry
Add the prescribed medicine and upload the current prescription. This records a request for assessment, not an order.
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We check the prescription
The medicine, prescription, patient details, destination and supporting documentation are reviewed case by case.
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We prepare a referral and written terms
Any proposal identifies the responsible dispensing party, the dispensing country, the total charges and the cancellation terms.
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You confirm and pay
Nothing proceeds until you accept the disclosed terms. Payment is requested only after that written summary has been provided.
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Dispatch and delivery
Dispatch and delivery dates are estimates. Timing can change with availability, documentation, customs or regulatory decisions outside our control.
Full detail is in delivery and fulfilment, order and fulfilment terms and cancellation and refunds.
Before you send an enquiry
These guides explain what to check and what to ask, so the enquiry arrives complete.
- How to read the medicine name on a cancer prescription A practical, non-medical guide for patients and caregivers who need to identify the medicine, strength and information needed for a prescription-led access request.
- What to ask the oncology team about a medicine A patient and caregiver checklist for discussing a prescribed oral cancer medicine with the treating oncology team.
- How to prepare a cancer medicine access request A simple checklist for patients and caregivers preparing a prescription-led medicine information or access request.
- A caregiver’s checklist for a cancer medicine request A practical checklist for a family member helping a patient ask a focused question about a prescribed cancer medicine.