The use of lorlatinib should focus on central nervous system side effects, hyperlipidemia, and the risk of weight gain. The impact on the central nervous system includes cognitive impairment and emotional fluctuations. Hyperlipidemia requires regular monitoring of blood lipids and timely intervention. Weight changes may be related to metabolic abnormalities. The following items detail specific precautions and countermeasures.

Central nervous system side effects

Loratinib may cause epilepsy, memory impairment, and emotional abnormalities, with a median onset time of 1.4 months. The symptoms are usually intermittent and can be relieved by adjusting the dosage. Be alert to serious mental symptoms such as suicidal tendencies.

(1) Principle of graded processing

Level 1 reactions can be maintained at the original dose or paused until baseline recovery is achieved; Levels 2-3 require suspension of administration and reduction of dosage before resuming; Level 4 requires permanent discontinuation of medication. Immediate medical attention is required if hallucinations or loss of control occur.

2. Management of Hyperlipidemia

Cholesterol and triglycerides should be monitored before treatment and 1-2 months after medication. Grade 4 hyperlipidemia requires temporary suspension of medication, and the original dose or reduced dose can be used after recovery. Recurrent patients require long-term lipid-lowering treatment.

(1) Intervention measures

After diagnosis, lipid-lowering drugs such as statins should be initiated. If combined with weight gain, it is necessary to evaluate dietary structure and increase exercise. Severe metabolic abnormalities may require multidisciplinary consultation.

3 factors associated with weight gain

May be related to metabolic abnormalities such as hyperlipidemia and hyperglycemia. Regular monitoring of fasting blood glucose and BMI changes is required. Medication should be suspended and the hypoglycemic regimen optimized for grade 3-4 hyperglycemia.

(1) Integrated management

It is recommended to record daily weight changes and exclude interfering factors such as edema. If accompanied by overeating, thyroid dysfunction should be investigated. Do not adjust the medication dosage on your own.