Lorlatinib (Lorbrena,Lorladx)

Introduction of Lorlatinib

Lorlatinib is administered orally once daily and is specifically used for the treatment of ALK-positive locally advanced or metastatic non-small cell lung cancer. The drug works by inhibiting the activity of ALK kinase—an enzyme that promotes cancer cell growth—thereby effectively controlling tumor growth and spread. Clinical studies have shown that standardized use of this medication can help prolong patients' survival.

Indications

During treatment with lorlatinib, the drug helps control tumor growth and spread, which can alleviate the following symptoms:

1.Breathing problems caused by tumor compression or invasion of the airways, such as difficulty breathing, shortness of breath, or persistent cough that does not resolve over time.

2.Chest pain caused by tumor invasion of the chest wall or lung tissue.

3.Other physical discomfort resulting from the tumor's mass effect.

Overview

Before Use Instructions

Lorlatinib is a targeted medication specifically used for the treatment of ALK-positive locally advanced or metastatic non-small cell lung cancer. This drug must be used under the guidance of a physician experienced in cancer therapy. Special attention should be paid to the following points: It must not be used by individuals taking strong CYP3A inducers (such as rifampin and other similar drugs). Patients with moderate or severe liver impairment, severe renal impairment, as well as individuals planning pregnancy, pregnant women, and breastfeeding women are generally not advised to use this medication. If a physician determines its necessity after evaluation, close monitoring is required. During medication, special care must be taken to avoid concurrent use with other drugs. If other medications are being taken or if there are underlying medical conditions, the specific details must be communicated to the physician in advance.

Dosage and Administration

Lorlatinib is a medication specifically indicated for the treatment of locally advanced or metastatic non-small cell lung cancer that is ALK-positive (meaning the patient's tumor has a specific ALK gene alteration). This type of lung cancer is a malignant tumor, and strict adherence to medication guidelines is essential. This drug must be used under the guidance of a physician experienced in anti-tumor therapy. Before initiating treatment, it is mandatory to confirm through specialized testing that the patient's tumor tissue exhibits ALK-positive characteristics. If the tablet is found to be broken, cracked, or otherwise damaged, it should not be taken.

Post-Usage Instructions

During the use of Lorlatinib, the following points should be noted: Firstly, it is essential to strictly follow the doctor’s instructions and regularly monitor changes in your condition. If you notice any discoloration, abnormal shape, or unusual odor of the tablets, stop using them immediately. When storing the medication, ensure the container is placed out of reach of children to avoid the risk of accidental ingestion.

Can Special Populations Use Lorlatinib?

Dosage regimens need to be specifically adjusted for patients with different physical conditions:

Patients with moderate or severe hepatic impairment: 

There is currently no established recommended dosage for such patients. The physician must make a decision based on the specific condition.

Patients with severe renal impairment: 

The standard daily dose of 100mg should be adjusted to 75mg daily.

Women planning pregnancy: 

Non-hormonal contraceptive measures must be used during treatment and for 6 months after discontinuing the medication.

Partners of men planning pregnancy: 

Male patients must ensure effective contraception during treatment and for 3 months after stopping the medication.

Pregnant women: 

This medication may cause harm to the fetus, requiring a strict assessment of the necessity for its use.

Breastfeeding women: 

Breastfeeding should not be undertaken during treatment and for 7 days after discontinuing the medication.

What Adverse Reactions Does Lorlatinib Have?

Individual physical conditions vary, and the adverse reactions that may occur can differ. During medication, it is crucial to pay close attention to changes in your body. Contact your doctor immediately if the following situations arise. It may also be necessary to monitor indicators such as blood pressure, heart rate, and respiration:

Brain-related: 

Difficulty concentrating, low mood, unexplained anxiety, severe headache, dizziness, insomnia or drowsiness, hallucinations or other abnormal mental states, and persistent fatigue.

Metabolic abnormalities: 

Elevated cholesterol or triglycerides (hyperlipidemia) found in blood tests, increased blood pressure, abnormal blood sugar levels (hyperglycemia).

Heart problems: 

ECG shows prolonged PR interval, which in severe cases can affect the normal heart rhythm (atrioventricular block).

Pulmonary reactions: 

Worsening cough, shortness of breath, and other symptoms resembling pneumonia (interstitial lung disease/non-infectious pneumonitis).

Nerve damage: 

Symptoms of peripheral neuropathy such as numbness or tingling in the hands and feet.

Fluid retention: 

Significant weight gain, swelling of the ankles, puffiness around the eyes.

Gastrointestinal discomfort: 

Diarrhea, nausea, vomiting.

Musculoskeletal: 

Joint pain, muscle stiffness and pain.

Skin reactions:

 Rash or itching.

Laboratory abnormalities: 

Abnormal liver function tests, changes in blood test values.

Contraindications

The use of Lorlatinib is prohibited in patients who are currently taking strong CYP3A inducers (these include drugs such as rifampin). This is because concurrent use of these two types of medications can trigger severe liver toxicity, potentially leading to a rapid deterioration of the condition.

Under What Circumstances Should Lorlatinib Be Stopped Immediately?

If severe discomfort occurs while taking the medication, seek medical attention immediately. The doctor will determine whether to discontinue the medication based on the specific situation, for example:

1.Life-threatening severe reactions such as difficulty breathing;

2.Persistent abnormalities in multiple liver function test indicators;

3.Severe heart rhythm problems;

4.Neurological symptoms that significantly impact daily life.

Whether to adjust the medication regimen or discontinue use must be decided by a professional doctor following a comprehensive evaluation.

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