The following are some medicines and supplements that may help improve memory and concentration, but please be sure to use them under the guidance of your doctor and avoid taking them yourself.： --- ### **1. Prescription drugs (need to be prescribed by a doctor)** -**Modafinil (Modafinil)** -**Use**: Used to improve alertness and concentration, commonly used in narcolepsy or shift work sleep disorders. -**Usage**: Usually take 50-200mg every morning, avoid taking it after the afternoon to prevent insomnia. -**Methylphenidate (Methylphenidate, such as ritalin)** -**Use**: The treatment of attention deficit hyperactivity disorder (ADHD) can improve concentration in the short term. -**Usage**: The dose varies from person to person (usually 5-60mg/day), and the doctor's instructions must be strictly followed. -**Amphetamine mixed salt (such as Adderall)** -**Use**: ADHD treatment drugs may enhance cognitive function. -**Usage**: The starting dose is usually 5-10mg/day, and the doctor needs to monitor side effects (such as heart palpitations and dependence risks). -**Donepezil (Donepezil)** -**Use**: Used in Alzheimer's disease, it may improve the memory of patients with mild cognitive impairment. -**Usage**: Usually 5-10mg before going to bed, long-term use is required to have an effect. --- ### **2. Over-the-counter supplements (the effect varies from person to person)** -**Caffeine + L-theanine** -**Use**: Caffeine refreshes the mind, L-theanine relieves anxiety, and the combination can improve concentration. -**Usage**: Caffeine 100-200mg+ L-theanine 100-200mg (such as green tea or supplements). -**Omega-3 fatty acids (DHA/EPA)** -**Use**: Supports the health of brain cells, and long-term supplementation may be beneficial to memory. -**Usage**: 1000-2000mg per day, it will last for several months. -**Ginkgo Biloba extract (Ginkgo Biloba)** -**Use**: May improve blood circulation in mild cognitive impairment, but the evidence is limited. -**Usage**: 120-240mg/day, take it 2-3 times. -**phosphatidylserine (PS)** -**Use**: May delay age-related cognitive decline. -**Usage**: 100-300mg/day, take with meal. - **B vitamins (especially B6/B9/B12)** -**Use**: Deficiency may cause cognitive problems, and supplementation can improve homocysteine metabolism. -**Usage**: According to the recommended dose (such as B12 500-1000µg/day). --- ###**Precautions** 1. **Consult a doctor**: In particular, prescription drugs may cause side effects (such as insomnia, anxiety, and dependence), and individual health needs to be evaluated. 2. **Non-pharmaceutical methods**: Sleep, exercise, meditation, and a healthy diet (such as the Mediterranean diet) are essential for cognitive function. 3. **Avoid abuse**: Long-term use of certain drugs (such as stimulants) may lead to tolerance or dependence. For targeted suggestions, please provide more background information (such as age, health status, and specific needs).