Peptides Semax 5mg CAS：80714-61-0

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Semax is a neuropeptide originally developed by Russian scientists as a drug for the treatment of a variety of neurological diseases. It is a synthetic peptide derivative of adrenocorticotropic hormone (ACTH) with neuroprotective and neurotrophic properties, and has significant effects on memory enhancement, anxiety relief, antidepressant and cognitive function improvement. Semax is most commonly used in Russia and some Eastern European countries as a prescription drug or research compound.

### **Physical and chemical properties**

- **Chemical structure**:

- Semax is a derivative of ACTH(4–10) with a peptide chain fragment structure of **Met-Glu-His-Phe-Pro-Gly-Pro**.

- Its molecular weight is approximately **889.94 g/mol**.

- **Physical properties**:

- Semax is a white or off-white powder, easily soluble in water, and the preparation is usually in the form of nasal spray or injection.

- It is sensitive to heat and light and needs to be stored away from light. It is recommended to store it in a low temperature environment (2-8°C).

### **Main effects**

Semax is a multifunctional neuropeptide that mainly plays the following functions by regulating the activity of neurotransmitters in the brain and stimulating the expression of nerve growth factor (NGF):

1. **Neuroprotection**:

- Protect neurons from hypoxia and oxidative stress damage.

- Has a significant recovery effect on patients with stroke or brain trauma.

2. **Promote cognitive function**:

- Enhance attention, memory and learning ability.

- Used in the treatment of cognitive impairment, memory loss and Alzheimer's disease research.

3. **Antianxiety and antidepressant**:

- Semax can regulate dopamine and serotonin levels in the brain and relieve anxiety and depression symptoms.

4. **Enhance anti-fatigue ability**:

- It has a relieving effect on long-term mental stress and physical fatigue.

### **Dosage and Usage**

The dosage and usage of Semax vary depending on the purpose. The common way of administration is nasal spray, and there is also an injection form of administration.

#### Nasal spray:

- Commonly used for mild cognitive enhancement, attention improvement or fatigue resistance.

- **Dose**: 250–1000 µg, 1–3 times a day.

- **Period**: Generally used continuously for **5–14 days**, and can be repeated after intervals depending on the effect and needs.

#### Injection (research use):

- Used to treat acute stroke or brain injury.

- **Dose**: 0.1–0.5 mg/kg body weight, intravenous or subcutaneous injection.

- **Period**: Usually **5–10 days**.

### **Half-life**

- Semax has a short half-life of about **3-5 minutes**, but its neuroprotective and modulatory effects are long-lasting and may last for hours or even days. This is because Semax activates long-term gene expression and cell signaling pathways.

### **Mechanism of Action**

1. **Neurotransmitter Regulation**:

- Enhances the activity of dopamine, serotonin and glutamate, regulates the level of neurotransmitters in the brain, and promotes cognitive and emotional regulation.

2. **Antioxidant and anti-inflammatory**:

- Reduces oxidative stress and inflammatory response, and protects nerve cells.

3. **Promotes the expression of neurotrophic factors (such as NGF)**:

- Stimulates neuronal regeneration and synaptic plasticity.

### **Cycle and Frequency of Use**

- **Short-term use**: Mainly used for acute neurological events (such as stroke), the cycle is usually **5-10 days**.

- **Long-term use**: If used for cognitive function enhancement or anxiety relief, it is usually used every few weeks to avoid tolerance.

### **Side Effects and Precautions**

#### Common Side Effects:

- **Mild Nasal Irritation**: Due to the form of nasal spray, it may cause mild discomfort.

- **Short-term headache or fatigue**: May occur during the first use.

- **Insomnia**: Large doses may cause mental overactivity.

#### Notes:

1. **Contraindications**:

- Individuals who are allergic to peptides should avoid using it.

- Pregnant and lactating women should use it with caution.

2. **Interactions with other drugs**:

- It may have synergistic effects with other drugs that affect the central nervous system (such as antidepressants, stimulants), and professional guidance is required.

### **Summary**

Semax is a neuropeptide with a wide range of functions, especially suitable for treating diseases related to the nervous system or enhancing cognitive ability. Due to its high safety and clear mechanism of action, it has been widely studied and used. Although it has fewer side effects, it is still necessary to pay attention to the dosage and cycle when using it to avoid adverse reactions caused by long-term or excessive use.

Semax is a synthetic peptide drug originally developed by Russia for neuroprotection and cognitive enhancement. It is widely used in clinical treatment and research in Russia and some former Soviet countries, especially in the field of nervous system-related.

### **I. Applicable population**

Semax is mainly suitable for the following populations and scenarios:

1. **Cognitive impairment or disorder:**

- Patients with neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease.

- Patients recovering after stroke (especially for improving neurological recovery).

2. **People with high cognitive needs:**

- Students and professionals who need to improve concentration, memory or processing speed.

3. **Anxiety and depression patients:**

- Due to Semax's potential regulatory effect on dopamine and endorphin metabolism, it can help improve emotional state.

4. **Fatigue and stress-related population:**

- People who feel physically and mentally exhausted under long-term work pressure.

5. **Rehabilitation of stroke or brain injury:**

- It can be used for recovery after cerebrovascular disease or traumatic brain injury.

6. **Others:**

- Used for certain eye diseases (such as optic neuropathy).

- May be used as a preventive neuroprotective drug (such as exposure to hyperoxia or hypoxia).

### **II. Working Principle**

The mechanism of action of Semax has not been fully clarified, but studies have shown that it works through multiple pathways, including the following aspects:

1. **Neuroprotection:**

- Enhances the expression of neurotrophic factors (such as brain-derived neurotrophic factor BDNF) in the brain, promoting neuronal survival and regeneration.

2. **Antioxidant and anti-inflammatory:**

- Reduces oxidative stress and inflammatory mediators, thereby protecting neurons from damage.

3. **Neurotransmitter regulation:**

- Regulates the levels of neurotransmitters such as dopamine, endorphins and glutamate, which helps improve mood, attention and cognitive function.

4. **Enhanced cerebral blood flow:**

- Promotes local blood circulation in the brain and improves the supply of oxygen and nutrients.

5. **Gene expression regulation:**

- Produces long-term positive effects on the nervous system by affecting the expression of certain genes (especially those related to learning and memory).

### **Usage and dosage**

Semax is usually administered in the form of nasal spray because it can directly act on the central nervous system while avoiding the reduction of drug efficacy caused by liver metabolism.

#### **Recommended dose:**

- **Therapeutic use:**

- The dosage varies depending on the indication:

- **Stroke recovery:** 200-500 micrograms per day (may be divided into 2-4 nasal sprays), the course of treatment is 5-14 days.

- **Neurological disease rehabilitation:** 200-300 micrograms per day for several weeks.

- **Cognitive enhancement or stress management:**

- 50-100 micrograms, 1-2 times a day.

- **Precautions:**

- The dosage is adjusted according to the individual's tolerance and effect of the drug.

- Use according to the doctor's advice or professional guidance to avoid overdose.

#### **Directions:**

1. Tilt your head back slightly and spray the drug into one nostril.

2. Inhale to ensure that the drug is evenly distributed.

3. Repeat the administration to the other nostril (if necessary).

4. Keep your head slightly tilted back for 1–2 minutes after spraying.

#### **Course of treatment:**

- Depending on the treatment goals, the course of treatment may be several days to several weeks.

- Long-term use requires regular monitoring.

### **Fourth, precautions and side effects**

1. **Common side effects:**

- Nasal irritation or dryness (rare).

- May occasionally cause short-term dizziness, fatigue or attention fluctuations.

2. **Contraindications:**

- People who are allergic to the ingredients.

- People with a history of severe mental illness or epilepsy should use with caution.

3. **Other precautions:**

- Pregnant and breastfeeding women should avoid use, or carefully consider under the guidance of a professional doctor.

- Use with caution when using with other drugs (especially those that affect the central nervous system) to prevent drug interactions.

### **Additional Tips**

- **Does a prescription need to be given:** In Russia, Semax is a prescription drug. When using it in other countries, you should be aware of its regulations and legality.

- **Storage method:** Generally store at low temperature (2–8°C) and avoid direct sunlight.

Semax is a synthetic peptide compound composed of ACTH (4-7) and glycine-proline dipeptide, originally developed by Russian scientists for the treatment of stroke and neurological diseases. Semax has attracted much attention in the field of neuroscience due to its wide range of neuroprotective and cognitive enhancement effects. The following are the main benefits and potential applications of Semax, covering multiple aspects:

### **1. Cognitive enhancement**

- **Promoting memory and learning ability**: Semax supports synaptic plasticity by increasing the level of brain-derived neurotrophic factor (BDNF), thereby improving memory formation and learning ability.

- **Focus**: Semax can improve concentration and executive function and is considered helpful for individuals who require high mental work (such as students or professionals).

### **2. Neuroprotective effects**

- **Antioxidant and anti-inflammatory**: Semax helps reduce oxidative stress and inflammatory responses, protecting nerve cells from damage.

- **Recovery after stroke**: Semax is widely used in Russia for rehabilitation treatment after stroke, and can accelerate patients' functional recovery by promoting blood flow to the brain and protecting brain cells.

### **3. Improve Depression and Anxiety**

- **Mood Regulation**: Semax can help regulate mood and relieve depression and anxiety symptoms by affecting the dopamine and serotonin systems.

- **Non-addictive**: Unlike traditional anti-anxiety drugs, Semax is non-addictive and is therefore considered a safe long-term option.

### **4. Improve Work Efficiency and Stress Resistance**

- **Anti-fatigue**: Semax can reduce brain fatigue and help individuals better cope with high-intensity mental activities.

- **Anti-stress**: It relieves the negative physical and mental effects of stress by regulating the levels of corticosterone (stress hormone).

### **5. Improve Neurodegenerative Diseases**

- **Parkinson's and Alzheimer's Disease**: Semax may slow the progression of these diseases by increasing BDNF and protecting dopaminergic neurons.

- **Multiple Sclerosis**: Its neuroprotective effects may be beneficial for patients with neuroinflammation-related diseases.

### **6. Potential Benefits for Vision and Hearing**

- **Improved Vision**: Semax may improve certain vision problems by enhancing the function and blood flow of the optic nerve.

- **Hearing Protection**: Potential protective effects against tinnitus and hearing loss are being studied.

### **7. Enhanced Immune Function**

- **Regulating Immune Response**: Semax may help maintain a healthy immune system by regulating inflammation and immune cell function.

### **8. Benefits for the Cardiovascular System**

- **Promoting Blood Flow**: Semax may improve blood flow to the heart and brain by regulating vascular function and blood flow, especially when vascular health is compromised.

### **9. No Obvious Side Effects**

- **High Safety**: Semax is considered a relatively safe peptide compound with minimal side effects, usually including mild nasal irritation, as it is commonly delivered as a nasal spray.

### **Future Potential**

Semax is still being studied, especially in the following areas:

- **Sports Performance**: It may help performance in high-intensity exercise by improving concentration and reducing fatigue.

- **Traumatic Brain Injury**: For improving cognitive recovery after brain trauma.

- **Long-term Health Optimization**: The neuroprotective and cognitive-enhancing effects of Semax may be used in healthy individuals to slow down aging-related brain function decline.

### **Summary**

Semax has attracted attention for its versatility, with potential benefits across multiple health areas, from improving cognitive abilities to promoting neuroprotection and mood regulation. Although most of its research and use has been concentrated in Russia and Eastern Europe, its scientific basis and clinical evidence are gradually being recognized in more countries. Future research will further reveal its potential and range of indications.

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