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Intramuscular injection, often abbreviated IM, is the injection of a substance into a muscle. In medicine , it is one of several methods for parenteral administration of medications. Intramuscular injection may be preferred because muscles have larger and more numerous blood vessels than subcutaneous tissue, leading to faster absorption than ...
Testosterone can be taken by a variety of different routes of administration. [2] [3] These include oral, buccal, sublingual, intranasal, transdermal (gels, creams, patches, solutions), vaginal (creams, gels, suppositories), rectal (suppositories), by intramuscular or subcutaneous injection (in oil solutions or aqueous suspensions), and as a subcutaneous implant.
The term injection encompasses intravenous (IV), intramuscular (IM), subcutaneous (SC) and intradermal (ID) administration. [35] Parenteral administration generally acts more rapidly than topical or enteral administration, with onset of action often occurring in 15–30 seconds for IV, 10–20 minutes for IM and 15–30 minutes for SC. [36]
Testosterone propionate is administered in oil via intramuscular injection. [ 1 ] [ 2 ] It has a relatively short elimination half-life and mean residence time of 2 days and 4 days, respectively. [ 1 ] [ 2 ] As such, it has a short duration of action and must be administered two to three times per week.
Needle insertion angles for 4 types of injection: intramuscular, subcutaneous, intravenous, and intradermal Injections are classified in multiple ways, including the type of tissue being injected into, the location in the body the injection is designed to produce effects, and the duration of the effects.
As such, the distinction between the terms anabolic steroid and androgen is questionable, and this is the basis for the revised and more recent term anabolic–androgenic steroid (AAS). [70] [75] [218] David Handelsman has criticized terminology and understanding surrounding AAS in many publications.
Testosterone undecanoate has a very long elimination half-life and mean residence time when given as a depot intramuscular injection. [ 27 ] [ 7 ] [ 8 ] Its elimination half-life is 20.9 days and its mean residence time is 34.9 days in tea seed oil , while its elimination half-life is 33.9 days and its mean residence time is 36.0 days in castor ...
Injection (IM Tooltip intramuscular injection or SC Tooltip subcutaneous injection) Testosterone: Andronaq, Sterotate, Virosterone: Aqueous suspension: 10–50 mg 2–3×/week Testosterone propionate b: Testoviron: Oil solution: 10–50 mg 2–3×/week Testosterone enanthate: Delatestryl: Oil solution: 50–250 mg 1x/1–4 weeks Xyosted: Auto ...