Dr.EndoIndy said:

Sharing my dosing arithmetic titration experience with compounded semaglutide — I have been tracking injection volumes meticulously: Using 5mg/2mL…

Peptide calculator app recommendation for dosing arithmetic: I use PeptideCalc to calculate reconstitution volumes and injection doses. Eliminates math errors completely.

Input: vial size (mg), desired concentration (mg/mL), prescribed dose (mg)
Output: BAC water volume (mL), injection volume (units on insulin syringe)

A math error with injectable medication can mean underdosing or overdosing. Use a calculator every time until the math becomes second nature.

bri_stats said:

The arithmetic is right and one caveat matters: a U-40 syringe changes the markings, not the volumes.

Thank you — that is the clearest version of this I have read, and I have read a lot of them. I will report back once I have actually tried it.

Dr.EndoIndy said:

Sharing my dosing arithmetic titration experience with compounded semaglutide — I have been tracking injection volumes meticulously: Using 5mg/2mL…

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

Monthly medication cost: $124
Supplies (syringes, BAC water, alcohol swabs): ~$12/month
Janoshik testing: ~$14/month (amortized quarterly)
Lab work: ~$54/month (amortized quarterly)
Total: ~$224/month

Compare to brand Wegovy at $1314/month without insurance. Compounded is roughly 88% cheaper for what I have found to be clinically equivalent medication.

Dr.GastroMayo 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…

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!

Moderator note: a couple of off-topic posts removed.