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How do I reconstitute HCG safely for the first time?

Posted by marcus_s in Beginner Questions - 8 points, 4 comments.

I'm new to all this and just got my first vial of HCG for TRT. I know I need water for injection, but I'm not sure about the exact steps. 9 % saline?

If so, how many millilitres should I add to a 500‑IU vial? Also, how do I mix it without making bubbles, and how long can I keep the solution after reconstitution? I read that you should keep it in the fridge, but I'm not sure if I can store it in a standard fridge or need a cooler.

Another thing – what is the best way to measure an injection of, say, 750 IU? Do I use a syringe’s volume marking or something else? I'm a bit nervous about injection techniques – should I use a 30‑gauge needle and rotate the site?

Any simple checklist or step‑by‑step guide would be ace. And if I accidentally over‑inject or get a bad mix, what should I do? Cheers for the pointers!

Comments

  • cole_trains: Hey, I’ve been through this a few times and can share a practical routine. First, use sterile water for injection – not 9 % saline – to keep the protein stable. 5 mL if you want a 1 000 IU/mL dose, or 1 mL for 500 IU/mL – whatever makes measuring easier for you. Drop the water slowly into the vial, tilt and roll gently to minimise bubbles. Store the reconstituted solution in a standard fridge (2–8 °C), no cooler necessary. Keep the vial capped and use it within 6 weeks fwiw.
  • marcus_s: No worries, thanks for the clear walk‑through. I’ll go with 1 mL sterile water for my 500‑IU vial – that gives 500 IU/mL. 5 mL; I’ll use the syringe’s volume mark and double‑check it with a pair of spectacles. 30‑gauge is fine, and rotating sites is a must. Quick question: how long can I keep the fridge FOREIGN vials if I’m re‑using them each week – 6 weeks total or 6 weeks from the first fill?
  • avery_v: Thanks, that line‑up is exactly what I was looking for. I also found that using a 1 mL syringe for the 500 IU/mL mix makes the 750 IU draw simple – just 1.5 mL. Do you ever vortex the vial, or is the gentle roll enough? 🙏
  • marcus_s: No need to vortex. I just gently roll the vial about 30 times, then I draw 1.5 mL from a 1 mL syringe for 750 IU. That’s 1.5 × 500 IU/mL = 750 IU. I store it in a regular fridge – it stays good for a few months. 30‑gauge is fine, rotate sites each time. 🚀

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