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ForumsCompounding & FormulationJust did my first reconstitution and I think I messed up — what worked for you? Page 3

Just did my first reconstitution and I think I messed up — what worked for you?

Dr.NateNeph Wed, Mar 5, 2025 at 10:30 AM 13 replies 1,680 viewsPage 3 of 3
Dr.GastroMayo
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Mar 8, 2025 at 8:22 AM#11
LindaRN_retired said:
Peptide calculator app recommendation for dosing arithmetic: I use DoseRight to calculate reconstitution volumes and injection doses.

For anyone reconstituting dosing arithmetic peptides: the water-to-powder ratio determines your concentration. Here's my reference:

Vial SizeBAC WaterConcentration0.25mg Dose
5mg2mL2.5mg/mL10 units
5mg2.5mL2mg/mL12.5 units
10mg2mL5mg/mL5 units
10mg3mL3.33mg/mL7.5 units

More water = easier to measure small doses but vial runs out faster. Find the balance that works for your dose.

Last edited: Mar 8, 2025 at 1:22 PM
25 0mike_nyc, VendorMark, COA_Karl and 22 others
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AmyNC_wife
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Mar 8, 2025 at 11:02 PM#12
dan_philly said:
The arithmetic is right and one caveat matters: a U-40 syringe changes the markings, not the volumes.

This is exactly what I could not find anywhere else. I will report back once I have actually tried it.

Last edited: Mar 9, 2025 at 12:02 AM
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kim_atl_prep
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Mar 9, 2025 at 1:43 PM#13
LindaRN_retired said:
Peptide calculator app recommendation for dosing arithmetic: I use DoseRight to calculate reconstitution volumes and injection doses.

Bacteriostatic water quality matters for dosing arithmetic reconstitution. Not all BAC water is created equal:

  • Should contain 0.9% benzyl alcohol as preservative
  • Must be sterile and pyrogen-free
  • Should come in a sealed, intact vial
  • Check expiration date — yes, BAC water expires
  • Store at room temperature, protected from light

I buy from a reputable medical supply company, not Amazon marketplace sellers. The $3 savings isn't worth the infection risk from unverified BAC water.

Last edited: Mar 9, 2025 at 7:43 PM
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raj_cambridge
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Mar 10, 2025 at 4:24 AM#14
Dr.NateNeph 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…

Just received my dosing arithmetic order — packaging review:

  • Outer box: plain brown, no medication identifiers (discreet) ✅
  • Inner insulation: Styrofoam with 4 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.

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mike_mod
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Mar 10, 2025 at 7:05 PM#15

Moderator note: a post naming a supplier has been edited. Discuss suppliers in the review sections, not here. No action needed from anybody.

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