Sustanon is generally advised as a hormone replacement therapy for men who are suffering from deficiency of testosterone either due to some underlying causes or owing to age related changes. Administration of testosterone injections such as sustanon is advised in men who have low testosterone levels, suffer from male menopause-like symptoms such as decreased libido and who are prone to develop osteoporosis (disorder of the bone characterised by increasing bone destruction) due to low testosterone levels in the body. These injections are advised to be administered once every week or in some cases once in two weeks.

The dosage and frequency of use of sustanon injection is decided by the physician based on the severity of hormone deficiency in men. In general, dosage should be adjusted to the individual response of the patient.

Adults:
Usually, one injection of 1ml per three weeks is adequate.

Elderly:
It should be noted that smaller and less frequent doses may achieve the same response.

Children:
It should be noted that smaller and less frequent doses may achieve the same response.

Female-to-male transsexuals:
Different specialist centres have used doses varying from one injection of 1ml every two weeks to one injection of 1ml every four weeks.