Needle Size for IM vs SC

mj65 · March 20, 2020, 10:07pm

Can I use 29g 1/2 inch needle for IM injection in delts or glutes fat pad area? I bought these for SC but going with IM admin. I also have 27g 1/2 inch. Is there much of a difference. I am not so much worried about how long it takes to draw as only injecting 2x week. Any recommendations are appreciated.
Thanks

jimbotrt · March 20, 2020, 10:41pm

I use 28g 1/2 IM thighs or delts without issue. You’re good to go!

mj65 · March 20, 2020, 10:54pm

Thanks

galgenstrick · March 21, 2020, 2:04am

Depends on how much fat you have. I think I have about 1/4-3/8” fat in my delts so it’s pretty much SubQ for me. My thighs have almost no fat, so it’s for sure IM.

ncsugrad2002 · March 21, 2020, 3:01am

I use 1/2” 30g for shallow IM delt injections. No issues.

GSX250 · March 21, 2020, 5:39pm

No. Too short. Too thin. 1-1.5 inch depending on muscle and body fat.

dextermorgan · March 21, 2020, 5:47pm

@GSX250
You would recommend a 1.5 inch needle for delts? Are you shooting for bone marrow?

dextermorgan · March 21, 2020, 5:51pm

What’s your bf percentage? I’ve been in total joint replacement surgeries with literal obese people who could do IM with a 1/2 inch needle in the lateral deltoid. It’s basically skin over muscle for those that are even remotely in shape.