The other day I found myself staring at a vial that should still have had a full 36 IU in it - at least according to the calculator. In reality there were barely 20 left. And for a moment I honestly didn't know whether I'd made a mistake or whether the vial was playing tricks on me.
What was going on?
The reason became clear quickly: I had obviously used too little BAC water when mixing. Probably because I wasn't precise enough reading the syringe - the question of whether you read at the water's edge or at the syringe tip had gotten me. The result: everything was more concentrated, every single dose was unknowingly a bit larger than planned, and the vial ran empty sooner than expected.
No drama - but annoying. In that moment I simply didn't know how to continue cleanly and whether I'd done something I shouldn't have.
Throwing it away wasn't an option for me
I injected the remaining 20 units after the usual 7 days. "Just throw it away" wasn't a real option for me - this stuff is too valuable for that, and it would have felt wrong. Instead I asked myself: What had I actually gotten per injection, and how do you calculate that backwards when the vial is empty?
That's exactly the insight behind all of this: When the vial is empty, you can easily back-calculate the real dose. You know how much you drew in total, you know how much was actually in there - and with that you can determine retroactively what each individual injection really contained.
That's ultimately what led to the reverse dose calculator. It takes exactly this calculation off your hands: you enter what you actually had in the vial, how many doses you drew - and it tells you what was really in your syringe. No guessing, no gut feeling.
What I want to pass on to you
If you ever find yourself in a similar situation - vial empty, dose unclear, mild panic - there's no reason to worry. It's a practical problem, and you can solve it with clear numbers. A few things that helped me:
Use the reverse dose calculator to back-calculate the actual dose once the vial is empty.
Work cleanly when mixing next time and note down the IU values right away - then you'll know later what was really in there.
If you're unsure: the forum has people who've been through exactly this.
I'm sharing this because this exact situation gave me headaches back then - and because I want to spare you the hour of searching and frustration that I went through. No medical advice, no dosing recommendation. Just my story and a tool that came out of it.
- Samuel