Description

Technical Parameters

Introduction

OIL

oil

product-1400-1400

Products Description

### Systematic introduction of STADA brand high-quality oil Testosterone Enanthate (TE250)

Testosterone Enanthate (TE) is a long-acting synthetic androgenic steroid drug widely used in clinical medicine and sports medicine. As an internationally renowned pharmaceutical company, STADA's Testosterone Enanthate Oil (TE250) is known for its high quality, stability and safety. This article will systematically analyze the characteristics of STADA TE250 from multiple dimensions, covering its chemical properties, physical properties, clinical applications, advantages and market positioning.

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### 1. Product Overview and Chemical Structure

#### 1. Chemical Basis

Testosterone Enanthate is a synthetic derivative of natural testosterone, formed by introducing an enanthate chain (enanthate ester) at the 17β hydroxyl position of the testosterone molecule. Its chemical name is: **17β-heptanoate-4-androsten-3-one**, the molecular formula is **C26H40O3**, and the molecular weight is **400.6 g/mol**. The esterification structure prolongs the half-life of the drug, allowing it to be slowly released in the body and reducing the frequency of injections.

#### 2. Drug form

STADA TE250 is an oil-based injection containing 250 mg of testosterone enanthate per milliliter (i.e., a concentration of 250 mg/mL). The solvent is usually a high-purity plant-derived oil (such as sesame oil or castor oil), and benzyl alcohol is added as an antibacterial agent.

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### 2. Physical and chemical properties

#### 1. Physical properties

- **Appearance**: Transparent to slightly yellow oily liquid, without suspended particles or crystal precipitation.

- **Viscosity**: Medium viscosity, ensuring easy injection during injection while reducing local irritation.

- **Solubility**: It is highly fat-soluble and almost insoluble in water, and requires an oily carrier to achieve stable suspension.

- **Stability**: It can be stored for a long time (usually 2-3 years) in a light-proof and low-temperature (2-8°C) environment, and can also maintain its effectiveness for at least 1 year at room temperature (below 25°C).

#### 2. Chemical properties

- **pH value**: The pH of the preparation is controlled at 4.5-7.0, and it is highly compatible with human tissues.

- **Ester chain hydrolysis rate**: Heptanoate is slowly hydrolyzed by esterase in the body to release free testosterone, with a half-life of about 4-5 days. The efficacy can last for 2-3 weeks after a single injection.

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### 3. Product classification and specifications

STADA TE250 is mainly divided into the following categories to meet different clinical needs:

#### 1. Standard Formulation

- **Concentration**: 250 mg/mL, suitable for conventional replacement therapy.

- **Advantages**: Balances the drug's long-lasting effect with injection comfort, and is widely used in patients with hypogonadism.

- **Packaging**: 1 mL/ampoule or 10 mL multi-dose bottle, glass material meets USP standards.

#### 2. Low-Solvent Variant

- **Features**: Reduces benzyl alcohol content (<0.9%), reducing the risk of allergies.

- **Applicable population**: Patients who are sensitive to preservatives or require long-term injections.

#### 3. Ultra-Purified Grade

- **Process**: Purity ≥ 99.5% through multi-stage molecular sieve filtration and low-temperature crystallization technology.

- **Advantages**: Extremely low impurity content, reduces inflammatory reactions at the injection site, suitable for competitive athletes or people with highly sensitive constitutions.

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### 4. Core Advantage Analysis

#### 1. Long-acting sustained-release properties

The introduction of heptanoate chains significantly prolongs the half-life of the drug, and patients only need to inject once every 7-14 days, improving compliance.

#### 2. Excellent stability

- **Thermal stability**: Verified by accelerated test (40°C/75% humidity), no degradation within 6 months.

- **Light stability**: Brown glass bottle packaging effectively blocks ultraviolet rays and avoids photolysis reactions.

#### 3. High bioavailability

Oil-based carriers delay drug absorption, flatten the blood drug concentration curve, reduce peak and valley fluctuations, and avoid drastic fluctuations in emotions or physical fitness.

#### 4. Production process advantages

- **cGMP compliance**: STADA production line complies with EU EMA and US FDA standards.

- **Non-pyrogen guarantee**: Endotoxin detection limit <0.25 EU/mL, far higher than the pharmacopoeia requirements.

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### 5. Clinical application and indications

#### 1. Primary and secondary hypogonadism

- **Efficacy**: restore serum testosterone to physiological levels (300-1000 ng/dL), improve sexual function, muscle mass and bone density.

- **Dosage**: The initial dose is usually 250 mg/2 weeks, adjusted according to blood tests.

#### 2. Delayed puberty

- **Scheme**: small dose intermittent injection (50-100 mg/week), simulating the natural puberty hormone rise curve.

#### 3. Cross-sex hormone therapy (Female-to-Male)

- **Action**: promote the development of male secondary sexual characteristics, and need to be used with anti-estrogen drugs.

#### 4. Sports medicine application (non-indications)

- **Controversial use**: bodybuilders use it in muscle-building cycles, but there are ethical and health risks.

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### 6. Precautions for use

#### 1. Injection technique

- **Recommended site**: gluteus maximus (deep intramuscular injection) or vastus lateralis.

- **Needle gauge**: 21-23G, 1.5 inches in length, ensure that the drug is injected into the muscle layer.

#### 2. Side effect management

- **Common reactions**: injection site pain (5%-15%), polycythemia, acne.

- **Serious risks**: Long-term abuse may lead to hepatotoxicity (rare) and increased cardiovascular risk.

#### 3. Contraindications

- Prohibited for patients with prostate cancer, breast cancer, and severe heart and kidney insufficiency.

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### 7. Market positioning and competition analysis

#### 1. High-end generic drug positioning

STADA TE250 has seized the market segment with a quality close to that of original drugs (such as Bayer Testoviron®), but at a price 20%-30% lower.

#### 2. Differentiation of quality control

- **Batch tracking system**: Each product comes with an independent QR code that can be traced back to the raw material batch.

- **Third-party certification**: Passed ISO 9001:2015 and WHO pre-certification to enhance international procurement trust.

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### 8. Future development trends

#### 1. Development of new carriers

Study lipid nanoparticle (LNP) carriers to further extend the half-life and reduce the injection volume.

#### 2. Personalized dosage regimen

Customize individualized dosing strategies in combination with genetic testing (such as the number of CAG repeats in the AR gene).

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### Conclusion

STADA TE250 has become a preferred product in the field of testosterone replacement therapy due to its chemical stability, long-term effect and strict production standards. Whether it is a clinician or a patient, it is necessary to weigh the efficacy and risk when making a choice and always follow the guidance of evidence-based medicine. In the future, with the advancement of formulation technology, the accuracy and safety of testosterone therapy will be further improved.