First post, long time student

Warrior!

New Member
This is my first post, but I've been learning from you all for years. I've been on TRT for about 6 years. I have always gone to the clinic and had them administer my injection once per week. I decided that I would rather start doing self-inject from home. They have given me enough pre-filled syringes for a month. I want to put a couple of weeks worth in an empty sterile vial. I know that when removing solution from a vial, you put an equal measure of air in, but when putting solution into a vial, would you pull air out, before or after you put the solution in?
 
This is my first post, but I've been learning from you all for years. I've been on TRT for about 6 years. I have always gone to the clinic and had them administer my injection once per week. I decided that I would rather start doing self-inject from home. They have given me enough pre-filled syringes for a month. I want to put a couple of weeks worth in an empty sterile vial. I know that when removing solution from a vial, you put an equal measure of air in, but when putting solution into a vial, would you pull air out, before or after you put the solution in?
Yes, you would pull air out. Just the reverse of drawing out testosterone.
 
You would waste an extra syringe just for that? And if you create too much of a vacuum you may lose some of it when withdrawing the needle. No, taking out the excess air should be done after or during the injection into the vial.
I wasn't judging him, just answering his questions. I take some the vacuum out of my vial, before I add anything.
 

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TRT Hormone Predictor Widget

TRT Hormone Predictor

Predict estradiol, DHT, and free testosterone levels based on total testosterone

⚠️ Medical Disclaimer

This tool provides predictions based on statistical models and should NOT replace professional medical advice. Always consult with your healthcare provider before making any changes to your TRT protocol.

ℹ️ Input Parameters

Normal range: 300-1000 ng/dL

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Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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