LipidDoc_ATL said:

Dead space is the answer to the missing dose.

I am going to disagree with reconstituting low as a general rule. More diluent, more punctures, more in-use days at room temperature, and the stability trade-off is real. Precision is not the only variable being optimised.

TrialTracker_MD said:

I reconstituted a 10mg vial with 2ml of bacteriostatic water and I want someone to check my unit arithmetic before I draw anything, because I keep…

Ongoing cost tracking for dosing arithmetic — transparency for the community:

Monthly medication cost: $157
Supplies (syringes, BAC water, alcohol swabs): ~$10/month
Janoshik testing: ~$12/month (amortized quarterly)
Lab work: ~$47/month (amortized quarterly)
Total: ~$217/month

Compare to brand Wegovy at $1247/month without insurance. Compounded is roughly 85% cheaper for what I have found to be clinically equivalent medication.

Dr.MetabolicMD said:

I am going to disagree with reconstituting low as a general rule.

Just received my dosing arithmetic order — packaging review:

• Outer box: plain brown, no medication identifiers (discreet) ✅
• Inner insulation: Styrofoam with 3 gel ice packs ✅
• Temperature: vials were cold to touch on arrival ✅
• Labeling: lot number, BUD, compound name, concentration ✅
• Included: COA, reconstitution instructions, dosing card ✅

This is what professional compounding pharmacy shipping looks like. If your order arrives without these basics, reconsider your vendor.

One thing that is still open after Dr.NephBHM_UK’s answer:

How to check the arithmetic without trusting a website calculator, since three calculators gave me three answers?

OP back with an update, since a thread like this is useless without one.

Follow-up: it was dead space. Switching to a low-dead-space fixed-needle syringe gave me the tenth dose back.