Testosterone injections are administered by injecting the sex hormone into muscle tissue, typically in the major muscles of the thigh, hip, upper arm or buttocks, according to Drugs.com. The injections are used in males ... More »

www.reference.com Science Human Anatomy Glands & Hormones

Symptoms of low testosterone levels in men include depression, fatigue, weakness and the loss of sex drive, according to WebMD. Testosterone levels usually begin to decline after age 30. Low testosterone levels cause the... More »

Types of testosterone replacement therapy include a transdermal skin patch, gels, a mouth patch, injections or implants. Oral testosterone may negatively affect the liver, so doctors prefer to use therapies that bypass t... More »

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Vitamin B12 can be given as an intramuscular injection in muscles of the hip, buttocks, upper arm and thigh. These are the four main injection sites for intramuscular injections. However, when multiple injections are nec... More »

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Some common intramuscular injection sites include the deltoid muscle of the arm, the vastus lateralis muscle of the thigh, and the ventrogluteal and dorsogluteal muscles of the buttocks, notes Healthline. The site depend... More »

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Testosterone is the primary male sex hormone, and its main function is to control male physical features. This hormone is created in the testes, and testosterone helps transform a boy into a man. Testosterone deepens the... More »

Testosterone is a sex hormone that is responsible for aiding in the development of the male sexual characteristics. Females also have minute concentrations of the hormone, but it is mostly found in males and is considere... More »

www.reference.com Science Human Anatomy Glands & Hormones