The optimal dosage of different drugs varies greatly and varies depending on the type of drug, dosage form, and individual patient conditions (such as age, weight, health status, liver and kidney function, etc.). For example, the common antipyretic acetaminophen, generally has a single dose of 0.3-0.6 grams for adults, which can be repeated every 4-6 hours and should not exceed 2 grams within 24 hours; while the initial dose of amlodipine for the treatment of hypertension is usually 5 mg once a day, which can be adjusted to 10 mg once a day according to the patient's response. It is extremely dangerous to arbitrarily determine the optimal dosage of a drug, which may lead to serious adverse reactions or even life-threatening. Therefore, the drug must be taken strictly according to the doctor's prescription and the dosage specified in the drug instructions. If you have any questions about the dosage of the drug, be sure to consult a doctor or pharmacist.