Heya Sadie
I hope talking about needles does not get me in trouble for violating the rule against talking about dosages, but I suppose since needles are not dosages I should be fine. Sorry to the moderators if I violate anything here.
The needles the pharmacy gave me are 25g x 5/8, and drawing up the estradiol can be a challenge. I have only been on injections since the 15th of December of 2017 and injecting weekly I have only injected a total of four times, so my experience is limited. However, on my last injection this past Friday I learned something about drawing the medicine into the syringe and I'll share that with you and the forums.
When I went in for lessons on how to inject, the nurse showed me how to get the medicine into the syringe and after going through all the motions to the point where she actually began drawing it she did so by delicately pumping the syringe's plunger to deal with the viscous nature of the medicine. I did it that way for the first few times, but on my last injection I learned if I just draw the plunger back as far as I can get it without actually pulling it out of the barrel (be careful not to pull it out and waste your meds!) and hold it there, the estrogen flows into the barrel slow, yes still, still but seemingly a bit faster then when I pumped it AND with the awesome added benefit of less air bubbles in the medicine. You know plucking those little bubbles out are a pain because it is indeed so viscous.
Even injecting subcu, (my injection sites are alternating upper thighs each week) I found that for two or three days after injection I was a bit sore in the area surrounding the point where I injected, but with the method of drawing the medicine by just pulling that plunger back as far as possible and holding it there resulted in absolutely no post injection pain and I am not sure why, but guessing it may be because there were less, none in fact, air bubbles using my latest method. Just to note, I never injected myself with a bunch of bubbles lol but there would be just a few.
I thought about getting a larger gauge needle to draw it up, but going forward at this point I am going to pass on it, firstly because the way I just explained how I draw the medicine is easy enough, I can just hold that plunger back while I watch TV or something, and secondly because I've been told that larger gauge needles will chew up the little rubber stopper on your vial faster.