zoe_NC said:

Concentration choice is a precision decision, not a preference.

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

Monthly medication cost: $125
Supplies (syringes, BAC water, alcohol swabs): ~$8/month
Janoshik testing: ~$10/month (amortized quarterly)
Lab work: ~$55/month (amortized quarterly)
Total: ~$195/month

Compare to brand Wegovy at $1215/month without insurance. Compounded is roughly 85% cheaper for what I have found to be clinically equivalent medication.

Following on from DebRD_ATL — and this may be the naive question:

How much material I am losing to dead space, and whether that explains why a 10mg vial gives me nine usable draws rather than ten?

hank_denver said:

Ongoing cost tracking for dosing arithmetic — transparency for the community: Monthly medication cost: $125 Supplies (syringes, BAC water, alcohol…

Quick syringe math for dosing arithmetic dosing: if your vial is reconstituted at 5mg/2mL, that's 2.5mg/mL. For a 0.25mg dose you need 0.1mL = 10 units on an insulin syringe.

I keep a chart on my fridge:

• 0.25mg = 10 units
• 0.5mg = 20 units
• 1.0mg = 40 units
• 1.25mg = 50 units

Always double-check your concentration before drawing up!

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.

Dr.GastroMayo said:

Quick syringe math for dosing arithmetic dosing: if your vial is reconstituted at 5mg/2mL, that's 2.5mg/mL.

Agreed, and it is worth saying that rounding to the nearest whole unit is usually acceptable at maintenance doses and is not acceptable at the bottom of a ladder, where one unit can be a fifth of the intended dose.