Note: The following information is for reference only and cannot replace the advice or diagnosis of a professional doctor. If you need to improve your memory and attention, you must first consult a professional doctor to obtain advice and prescriptions for your personal situation. Currently, there are several types of drugs that are sometimes used to improve memory or attention, but they are generally prescription drugs and are only suitable for specific medical diagnoses (such as attention deficit hyperactivity disorder [ADHD], Alzheimer's disease, etc.), and should never be taken or adjusted on your own. The following are some commonly discussed drug categories and general usage instructions, but the specific usage and dosage must be determined under the guidance of a doctor: 1. Drugs for attention deficit and concentration problems a. Stimulant drugs (such as methylphenidate [trade name: Ritalin], amphetamine drugs [such as Adderall]): • Use: Mainly used to treat ADHD, can help improve attention and concentration. • General instructions: These drugs are generally taken in the morning, the starting dose is usually low, and then gradually adjusted according to the patient's response and tolerance. Because the dosage, frequency of use, and possible side effects vary greatly from person to person, the specific plan must be formulated by a licensed physician. b. Non-stimulant drugs (e.g. Modafinil, originally used to improve alertness): • Uses: Mainly used to treat narcolepsy, and in some cases also discussed as improving attention, but its indications and safety issues remain controversial. • General instructions: Use must strictly follow the doctor's prescription and monitoring. 2. Drugs for memory loss or cognitive impairment (mainly used in conditions such as Alzheimer's disease) a. Cholinesterase inhibitors (e.g. Donepezil [trade name: Aricept], Rivastigmine [Rivastigmine], Galantamine [Galantamine]): • Uses: These drugs are used to improve cognitive function and memory in patients with mild to moderate Alzheimer's disease. • General instructions: Usually start with a lower dose, such as Donepezil often starts with 5 mg per day, and then the dose may be adjusted based on tolerance and effect. This type of drug may have side effects and needs to be used under the close monitoring of a doctor. 3. Some substances that are classified as "smart drugs" or "brain enhancers" (such as Piracetam discussed in some studies): • Uses: Some over-the-counter products or supplements are sometimes promoted as improving memory and concentration, but the evidence for their effectiveness and safety is not sufficient, and their regulatory status varies in different countries and regions. • Precautions: Be very cautious when choosing such products, and it is best to consult a doctor or pharmacist to avoid potential risks. Summary suggestions: • The use of any medication involves many factors such as dosage, duration of use, individual health status, other medications being taken, and potential side effects, and must be subject to medical evaluation. • Never start or adjust the use of any of the above medications without a doctor's confirmation. • If you have concerns about memory or concentration, give priority to professional evaluation and choose an appropriate treatment plan when necessary. Once again, this answer is not medical advice. If you need treatment plans or guidance on medication use, be sure to meet with a professional medical staff and make a decision after a comprehensive evaluation.