Masteron is typically administered intramuscularly (IM) through a pre-loaded syringe or needle. The injection site should be clean and sterilized to minimize the risk of infection. The preferred injection sites are large muscles, such as the deltoids or gluteus medius. These muscle groups have a larger volume of tissue and are less associated with sensitive nerves or blood vessels, making the injection process safe and painless.
https://www.medsexporter.com/p....roduct/masteron-inje