Sustarix 250 Injection is a prescription medicine containing a blend of testosterone esters designed to provide sustained testosterone replacement. Testosterone is the primary male sex hormone responsible for the development and maintenance of male reproductive tissues, secondary sexual characteristics, muscle mass, bone density, and normal sexual function.
Testosterone ester preparations are prescribed as testosterone replacement therapy (TRT) for adult men with clinically confirmed hypogonadism, where low testosterone levels have been established by appropriate clinical evaluation and laboratory testing.
Product Specifications
- Product Name: Sustarix 250 Injection
- Dosage Form: Injectable Solution
- Strength: 250 mg/mL
- Drug Class: Androgen (Testosterone Replacement Therapy)
- Route of Administration: Intramuscular Injection
- Prescription Status: Prescription-only medicine
Therapeutic Indication
Sustarix 250 may be prescribed for testosterone replacement in adult men with confirmed testosterone deficiency associated with conditions such as:
- Primary hypogonadism
- Secondary hypogonadism due to pituitary or hypothalamic disorders
Treatment should only be initiated after confirmation of testosterone deficiency through appropriate clinical assessment and laboratory testing.
Mechanism of Action
The testosterone esters in Sustarix 250 are gradually converted into testosterone after intramuscular administration. Testosterone acts on androgen receptors throughout the body to help maintain normal male physiological functions, including:
- Development and maintenance of male reproductive organs
- Maintenance of muscle mass and strength
- Bone mineral density
- Red blood cell production
- Sexual function and libido
- General well-being
Administration
- Administer only under the supervision of a qualified healthcare professional.
- The dose and dosing interval should be individualized according to the patient’s clinical condition and response to therapy.
- Regular monitoring of testosterone levels and other relevant laboratory parameters is recommended during treatment.
Possible Adverse Effects
Potential adverse effects may include:
- Injection site reactions
- Acne or oily skin
- Fluid retention
- Increased red blood cell count
- Mood changes
- Changes in blood pressure
- Prostate-related effects in susceptible individuals
Patients should promptly report any unusual symptoms to their healthcare provider.
Precautions
Before treatment, healthcare providers should evaluate patients for:
- Prostate disorders
- Cardiovascular disease
- Liver or kidney impairment
- Sleep apnea
- Polycythemia
- Other conditions where testosterone therapy may not be appropriate
Storage
- Store below 25°C.
- Protect from light.
- Do not freeze.
- Keep in the original packaging.
- Keep out of reach of children.



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