Crizalk 250 Mg

Description

Last Updated on 10/14/2026 ✔ Medically Reviewed by Dr. Arjun Srivastav

What Is Crizalk 250 mg?

Crizalk 250 mg is an oral anticancer medicine containing crizotinib, a tyrosine kinase inhibitor. It is used in certain cases of non-small cell lung cancer (NSCLC) when testing identifies specific changes involving the ALK or ROS1 genes.

Unlike chemotherapy medicines that affect a range of dividing cells, crizotinib targets particular proteins involved in cancer-cell signalling. A specialist determines whether this treatment is appropriate after reviewing the diagnosis and test results.

Crizalk 250 mg Uses

250 mg of Crizalk is used for specific cancers in which molecular testing identifies a target that crizotinib can act on. The diagnosis and applicable prescribing information determine whether treatment is suitable.

ALK-positive non-small cell lung cancer

Some NSCLC tumours have changes involving the anaplastic lymphoma kinase (ALK) gene. These changes can produce signals that support cancer-cell growth. Crizotinib blocks ALK activity and may be prescribed for eligible patients with ALK-positive disease.

ROS1-positive non-small cell lung cancer

Crizotinib is also used for certain patients with ROS1-positive NSCLC. A laboratory test is needed to identify this molecular change before treatment can be considered. A diagnosis of lung cancer alone does not mean that Crizalk 250 is suitable. The treatment decision depends on the tumour’s molecular profile and the patient’s individual circumstances.

How Does Crizalk 250 mg Work?

Crizotinib blocks the activity of certain proteins, including ALK and ROS1, that can send signals encouraging cancer cells to grow. When these proteins are abnormally active, interfering with their signalling may slow or limit tumour growth. The medicine does not work in the same way for every type of cancer. Testing helps the specialist establish whether the relevant molecular target is present.

In simple terms: This medicine contains crizotinib, which blocks specific cancer-related signalling proteins and interferes with signals that support tumour growth.

Crizalk 250 mg Dosage

For adults receiving crizotinib for the relevant metastatic ALK-positive or ROS1-positive NSCLC indications, the usual recommended dose is 250 mg twice daily. The treating specialist may adjust the dose or interrupt treatment if side effects or other medical factors require it.

Follow the prescription supplied for your treatment. Do not change the dose or stop taking it without discussing it with your treating team.

How to Take Crizalk 250 mg

Take Crizalk 250 capsule exactly as prescribed by your doctor and follow these instructions for each dose.

• You can take it with or without food.
• Swallow the capsule whole with water.
• Do not crush, chew, open or dissolve the capsule.
• Try to take each dose at consistent times.
• If you vomit after taking a dose, do not take an extra capsule. Take the next dose at its usual time.

Missed Dose

If you remember a missed dose, take it unless fewer than six hours remain before your next scheduled dose. If the next dose is due in less than six hours, skip the missed dose and continue with your usual schedule.

Never take two doses together to make up for a missed capsule.

Overdose

Taking more capsule than prescribed may increase the risk of harm. Contact a healthcare professional or poison information service promptly for advice if you take too many capsules. Seek emergency assistance if you develop severe symptoms.

Crizalk 250 mg Side Effects

Side effects vary between patients. Some are relatively common, while others may indicate a serious reaction that needs urgent assessment.

Severe breathing difficulty, sudden loss of vision, fainting or intense abdominal pain warrants emergency medical assessment.

Crizalk 250 mg Precautions

Before treatment begins, tell your specialist about your medical history and all medicines you take. This helps the treatment team assess possible risks and decide what monitoring is needed.

• Liver problems: Report any existing liver condition. It can affect liver function, so blood tests may be needed during treatment.
• Kidney problems: Let your specialist know if you have reduced kidney function, as it may affect treatment decisions.
• Heart conditions: Disclose a history of rhythm problems, a slow heartbeat, or fainting episodes.
• Lung conditions: Report existing breathing problems and seek prompt advice if a new cough or breathlessness develops.
• Vision problems: Tell your treatment team about existing eye conditions and report new changes in eyesight.
• Other medicines: Provide a complete list of prescription and non-prescription medicines, herbal products, and supplements before starting treatment.

Monitoring During Treatment

Your specialist may arrange regular checks to assess how you are responding to Crizalk 250mg and identify side effects early. Depending on your medical history and symptoms, these may include liver blood tests, heart-rate or heart-rhythm assessments, and checks for new vision or breathing problems.

Attend scheduled appointments even if you feel well. Report new or worsening symptoms rather than waiting until your next routine visit.

Crizalk 250 mg Safety Advice

Follow these precautions during treatment, as your health conditions and other medicines may affect the advice you need.

Grapefruit

Avoid grapefruit and grapefruit juice during treatment because they can affect crizotinib levels in the body.

Sun Exposure

It may increase sensitivity to sunlight. Limit prolonged exposure, wear protective clothing and use suitable sun protection when outdoors.

Pregnancy & Breastfeeding

Tell your doctor if you are pregnant, planning a pregnancy or breastfeeding. It may harm an unborn baby, so discuss contraception with your doctor.

Driving and Operating Machinery

This medication may cause vision changes, dizziness or tiredness. Avoid driving if you experience these effects.

Crizalk 250 mg Drug Interactions

Some medicines can change the amount of crizotinib in the body, while others may increase the risk of particular side effects. The interaction depends on the medicine and the patient’s circumstances.

Give your doctor or pharmacist a complete list of medicines, vitamins, supplements and herbal products you use. Do not start, stop or change another medicine without checking whether it is suitable alongside Crizalk 250.

Crizalk 250 mg Storage and Disposal

Store the capsules according to the instructions printed on the supplied packaging.

• Keep the medicine in its original packaging unless the product instructions say otherwise.
• Protect it from conditions that could damage the capsules, including excessive heat or moisture where applicable.
• Keep it out of the reach of children.
• Do not use capsules after their expiry date.

Ask a pharmacist how to dispose of unused or expired medicine safely. Do not flush it down the toilet or put it in household waste unless local disposal guidance specifically permits this.

Treatment with This medication requires regular follow-up to monitor your response and identify possible side effects or medicine interactions. Follow your specialist’s instructions and report any new or worsening symptoms.

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