
Dacomitinib is used to treat non-small cell lung cancer with EGFR mutations.
- Take Dacomitinib once a day. It may be taken with or without food.
- Swallow the tablet whole. Do not break, chew or crush the tablet.
- Inform your doctor or pharmacist if you have difficulty swallowing.
If you forget to take a dose, skip the missed dose, and take it at the next scheduled time. Do not take two doses to make up for the missed dose.
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Inform your healthcare professional if:
- You are allergic to this medication or any of the other ingredients of this medication.
- You are taking any other medications, including supplements, traditional medications and herbal remedies.
- You have any other medical conditions such as lung or eye problems.
- You should not breastfeed during treatment and for at least 17 days after stopping Dacomitinib.
- You should not become pregnant during treatment. You should use an effective birth control method during treatment and for at least 17 days after stopping Dacomitinib.
The table below will list some of the common side effects as well as the rare but serious side effects.
Side Effect | Management |
Diarrhoea (loose and frequent stools) |
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Nausea or vomiting |
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Poor appetite |
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Mouth ulcers or sores. This can occur on the tongue, the sides of the mouth or in the throat and can lead to an infection. |
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Acne-like rashes (pimples) may appear on the face, upper chest and back. It usually develops within two weeks after starting treatment and will get better after stopping treatment. Your skin may also become flaky and scaly. |
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Nail changes that may affect both fingernails and toenails. Your nails may:
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Liver problems |
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Lung problems |
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Drug allergy Symptoms may include:
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It is normal to experience some side effects from Dacomitinib. As discussed with your doctor, taking Dacomitinib will be beneficial for your condition. Do not stop taking Dacomitinib without checking with your doctor.
Inform your healthcare professional if you are taking or intend to take any other medications such as omeprazole, supplements, traditional medications or herbal remedies to treat gastritis.
Store in a cool and dry place at 30 degrees Celsius and below, away from direct sunlight. Keep this medication away from children.
Pack this medication into a black trash bag and seal it tightly before throwing it into the rubbish chute or bin.
Disclaimer
Please take note that the above is not a complete list of all possible side-effects. If you have any concerns about your medication or if you have other side-effects that you think are caused by this medication, please consult your doctor or pharmacist. If you take more than the recommended dose, please seek medical advice immediately. The information provided on this page does not replace information from your healthcare professional. Please consult your healthcare professional for more information.
This article is jointly developed by members of the National Medication Information workgroup. The workgroup consists of cluster partners (NHG Health, National University Health System and SingHealth), community pharmacies (Guardian, Unity and Watsons) and Pharmaceutical Society of Singapore. The content does not reflect drug availability and supply information in pharmacies and healthcare institutions. You are advised to check with the respective institutions for such information.

