Larotrectinib Oral Instructions

1. Indications

Larotinib is a targeted therapy drug suitable for TRK (neuronal growth factor receptor) gene fusion-positive tumors. These tumors can appear in different organs and tissues, including but not limited to childhood tumors, breast cancer, lung cancer, kidney cancer, colorectal cancer, and thyroid cancer.

2. Mechanism of action

The main mechanism of action of larotrectinib is to interfere with the growth and spread of tumors by inhibiting abnormal signaling caused byTRK gene fusion. It is a targeted therapy drug that specifically targets the TRK gene fusion to reduce damage to normal cells.

3. Pharmacology

Larotrectinib inhibits the activity of TRK protein by binding to it, thereby reducing the proliferation and survival of tumor cells. This can lead to tumor shrinkage or stabilization.

4. Dosage and usage

The dosage and usage of larotrectinib should be based on the doctor's advice and the patient's specific condition. The generally recommended dose is to be taken orally twice daily, with one hour after a meal or two hours after a meal to reduce the possibility of gastrointestinal discomfort. Medication dosage is usually calculated based on body surface area. Patients should strictly follow their doctor's prescription and the instructions on the drug label.

5. Side Effects

Larotinib may cause some side effects, including but not limited to the following:

1.Nausea and vomiting: Some patients may experience mild to moderate nausea and vomiting. Anti-nausea medications may be considered to reduce these symptoms while on medication.

2.Fatigue: Some patients may experience fatigue or weakness. Rest and appropriate physical activity can help relieve these symptoms.

3.Headache: Headache is another possible side effect, but it is usually mild.

4.Diarrhea: Some patients may experience diarrhea. Staying well hydrated and eating a healthy diet can help reduce this symptom.

5.Others: Other possible side effects include gastrointestinal discomfort, rash, abnormal liver enzymes, etc. Patients should monitor closely and report any unusual symptoms to their doctor promptly.

6. Warnings and Precautions

Patients should pay attention to the following when using larotrectinib:

1.Monitoring and evaluation: Patients should undergo regular examinations and evaluations recommended by their doctor to determine whether the drug continues to be effective and whether there are side effects or disease progression.

2.Drug Interactions: Patients should inform their doctors about all medications they are taking, including prescription drugs, over-the-counter drugs, and supplements, to avoid possible drug interactions.

3.Pregnant and lactating women: Larotrectinib may cause danger to the fetus, so pregnant women should avoid its use. Breastfeeding women should also stop breastfeeding or discontinue larotrectinib treatment to reduce the risk to the infant.

4.Driving and operating machinery: Larotrectinib may cause headaches and fatigue, so you should drive a vehicle or operate machinery with caution while taking the drug.

7. Contraindications

Contraindications to larotrectinib include allergic reactions to the components of the drug. Patients should inform their doctor of any known drug allergies.

8. Drug interactions

Patients should inform their doctors about all medications they are taking before using larotrectinib to avoid possible drug interactions. Larotrectinib may interact with certain drugs, affecting their metabolism and effectiveness.

9. Medication for Special Populations

1.Pediatric Medication: Larotrectinib can also be used in pediatric patients, but the dosage and usage may vary based on age and weight. Treatment of pediatric patients should be directed by a professional medical team.

2.Dosing in elderly patients: The dosing principles of larotrectinib in elderly patients are usually similar to those in adult patients, but doctors may adjust the dose based on the patient's overall health and tolerance.

10. Listing and price status

Larotrectinib has been launched in China, but it has not been included in medical insurance. Since it has not been launched in China for a long time, it may be difficult to purchase it in China. Please consult the local hospital pharmacy for details. There are original drugs and generic drugs of larotrectinib abroad. The original drugs include German version, American version, European version and Hong Kong version. The price is basically around 20,000 yuan. Generic drugs include Lao and Bangladeshi versions, with prices ranging from two to three thousand. The ingredients of original drugs and generic drugs are basically the same.

Larotinib is a targeted therapy drug used to treat TRK gene fusion-positive tumors. Patients should closely follow their doctor's recommendations and the instructions on the drug label when using larotrectinib, and undergo regular examinations and evaluations to ensure optimal treatment effects and minimal side effects. The dosage, usage, and duration of the drug will be based on the patient's specific condition, so guidance from your doctor is crucial. Patients should also discuss treatment goals and expected results with their doctor to develop a personalized treatment plan.