I use 25g ( 0.5x25mm) with an insulin needle. My protocol is 20mg test cyp daily. Ive taken your advice and today the flow back was less than other time but there was some.
A luer-lock 25G x 1" is not an insulin needle!
1"needle length would be strictly for injecting IM.
Yes it could be used when injecting sub-q as long as you do not push it in too far but a 1/2" (12.7MM) needle length would be the longest needle one would want to use when injecting strictly sub-q!
You need to switch over to an LDS insulin syringe (fixed needle) 27-31G.
Trust me when I tell you if you follow my advice given in post #3 while using an LDS insulin syringe 27-31G flow back of the oily solution will be minimal--->non-existent!
The higher the gauge the smaller the diameter of the shaft/lumen (hollow bore) of the needle which will help minimize any flow back of the oily solution as the size of the puncture into the skin/adipose will be tiny.
An LDS (low dead-space) insulin syringe comes with a fixed/attached needle 27-31G various needle lengths.
Most in the know on TTh are using an LDS insulin syringe whether 1 ml (100 unit), .5 mL (50 unit) or .3mL (30 unit) with fixed needle length (6MM, 8MM, 12.7MM) when injecting strictly sub-q or 12.7MM when injecting shallow IM.
One of the main advantages of using an LDS insulin syringe for testosterone therapy is that there will be minimal waste of medication due to low-dead space let alone you can draw/inject using the same needle (fixed).
Numerous benefits of using an LDS insulin syringe (fixed needle) as injections are virtually pain-free, minimal trauma to the tissue, minimizing any waste of medication, easier for many to measure accurate doses when injecting lower volumes, and you can draw/inject using the same needle to boot.
“Fixed insulin type syringes have no void space at the point where the needle joins the syringe, and so are known as Low Dead Space Syringes, which is sometimes abbreviated in the literature to LDSS. They are made like this so that the full accurate dose is delivered, and there is no waste”
Selecting the Devices There are many different syringes and needles, suiting many different procedures. It is important to choose the needles and syringes carefully according to the type of injection to be administered. For example, the length and gauge of the needle and type of syringe must...
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