Peptide Reconstitution — Complete Reference

Complete Peptide Reconstitution Reference

Comprehensive reconstitution protocols for all FDA-approved and major investigational peptides.

Reconstitution Principles

Solvent Selection

Solvent	Use Case	Volume	Notes
Bacteriostatic water (0.9% BA)	Most peptides	Per protocol	Contains preservative; multi-dose
Sterile water for injection	Sensitive peptides	Per protocol	Single-use; no preservative
Normal saline (0.9% NaCl)	IM/SC injection	Per protocol	Isotonic; compatible with most peptides
0.9% BA in NS	Peptides requiring BA	Per protocol	Contains preservative

Reconstitution Volume Calculations

Standard concentration: 1 mg/mL (for most research peptides)

Peptide Amount	Desired Concentration	Add Solvent	Result
1 mg	1 mg/mL	1 mL	1 mg/mL
2 mg	1 mg/mL	2 mL	1 mg/mL
5 mg	2.5 mg/mL	2 mL	2.5 mg/mL
10 mg	5 mg/mL	2 mL	5 mg/mL
10 mg	2.5 mg/mL	4 mL	2.5 mg/mL
10 mg	1 mg/mL	10 mL	1 mg/mL

Formula: Volume (mL) = Amount (mg) ÷ Desired concentration (mg/mL)

Syringe Selection

Insulin Syringes (0.3 mL, 0.5 mL, 1 mL)

Syringe	Markings	Best For
0.3 mL (30 units)	0.01 mL increments	Micro-doses <300 µg
0.5 mL (50 units)	0.01 mL increments	Small doses 300–500 µg
1 mL (100 units)	0.01 mL increments	Standard doses >500 µg

Tuberculin Syringes (1 mL)

Feature	Advantage
0.01 mL markings	Precise dosing
Luer-lock tip	Secure needle attachment
Thin wall	Reduced dead space

Needle Selection

Route	Gauge	Length	Site
SC (thin patients)	29–31G	½ inch	Abdomen, thigh
SC (average)	27–29G	½ inch	Abdomen, thigh
SC (obese)	25–27G	⅝–1 inch	Abdomen
IM	22–25G	1–1.5 inch	Deltoid, vastus lateralis

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FDA-Approved Peptide Reconstitution

Semaglutide (Ozempic)

Parameter	Specification
Formulation	Pre-filled pen (liquid)
Reconstitution	Not required
Concentration	2 mg/1.5 mL or 4 mg/3 mL
Storage	Refrigerated (unopened), room temp (in-use)
Administration	SC injection

Tirzepatide (Mounjaro)

Parameter	Specification
Formulation	Pre-filled pen (liquid)
Reconstitution	Not required
Concentration	2.5 mg/0.5 mL, 5 mg/0.5 mL, 7.5 mg/0.5 mL, 10 mg/0.5 mL
Storage	Refrigerated (unopened), room temp (in-use)
Administration	SC injection

Exenatide ER (Bydureon)

Parameter	Specification
Formulation	Lyophilized powder
Solvent	Provided diluent (0.65 mL)
Add diluent	Slowly along vial wall
Swirl gently	Avoid vigorous shaking
Wait	15 minutes before administration
Concentration	2 mg/0.65 mL
Administration	SC injection

Tesamorelin (Egrifta)

Parameter	Specification
Formulation	Lyophilized powder
Solvent	Provided diluent (1.2 mL bacteriostatic water)
Add diluent	Slowly to vial
Swirl gently	Avoid foaming
Wait	5 minutes for dissolution
Concentration	2 mg/1.2 mL ≈ 1.67 mg/mL
Administration	SC injection

Octreotide LAR (Sandostatin LAR)

Parameter	Specification
Formulation	Lyophilized powder + diluent
Solvent	Provided diluent (mannitol solution)
Add diluent	2 mL to vial
Swirl gently	Until uniform suspension
Wait	5 minutes
Concentration	10 mg, 20 mg, or 30 mg per vial
Administration	IM injection

Lanreotide (Somatuline)

Parameter	Specification
Formulation	Pre-filled syringe (liquid)
Reconstitution	Not required
Concentration	60, 90, or 120 mg/mL
Administration	Deep SC injection

Pasireotide LAR (Signifor LAR)

Parameter	Specification
Formulation	Lyophilized powder
Solvent	Provided diluent
Add diluent	2 mL to vial
Swirl gently	Until uniform suspension
Concentration	20, 30, or 40 mg per vial
Administration	IM injection

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Research Peptide Reconstitution

General Protocol (Most Lyophilized Peptides)

Step 1: Gather supplies

• Lyophilized peptide vial
• Bacteriostatic water or sterile saline
• Bacteriostatic water vial
• 3 mL or 5 mL syringe
• 18G drawing needle
• 27G or 29G injection needle
• Alcohol swabs
• Gloves

Step 2: Clean tops

• Wipe peptide vial top with alcohol swab
• Wipe bacteriostatic water vial top with alcohol swab
• Allow to dry (30 seconds)

Step 3: Draw solvent

• Attach 18G needle to syringe
• Draw required volume of bacteriostatic water
• Expel air bubbles

Step 4: Inject solvent into peptide vial

• Insert needle through vial center
• Slowly inject solvent along vial wall
• Do not spray directly onto powder (causes foaming)

Step 5: Dissolve

• Gently swirl vial until powder dissolves
• Do not shake (causes protein denaturation)
• Solution should be clear and colorless
• If cloudy or contains particles, do not use

Step 6: Verify concentration

• Confirm total volume matches calculation
• Verify no undissolved material

Step 7: Label vial

• Peptide name and amount
• Date and time of reconstitution
• Expiration date (usually 30 days)
• Concentration

Step 8: Draw dose

• Attach 27G or 29G injection needle
• Draw correct dose volume
• Expel air bubbles
• Administer

BPC-157

Parameter	Specification
Amount	5 mg per vial
Solvent	2.5 mL bacteriostatic water
Concentration	2 mg/mL
Dose range	250–500 µg (0.125–0.25 mL)
Route	SC injection
Injection site	Abdomen (preferred) or thigh
Storage	2–8°C after reconstitution
Stability	30 days refrigerated

Thymosin Beta-4 (TB-500)

Parameter	Specification
Amount	5 mg per vial
Solvent	2 mL bacteriostatic water
Concentration	2.5 mg/mL
Dose range	2.5–5 mg (1–2 mL)
Route	SC or IM injection
Injection site	Abdomen (SC) or deltoid (IM)
Storage	2–8°C after reconstitution
Stability	30 days refrigerated

GHK-Cu

Parameter	Specification
Amount	10 mg per vial
Solvent	2 mL bacteriostatic water
Concentration	5 mg/mL
Dose range	1–2 mg (0.2–0.4 mL)
Route	SC injection or topical
Storage	2–8°C after reconstitution
Stability	30 days refrigerated

Ipamorelin

Parameter	Specification
Amount	5 mg per vial
Solvent	2 mL bacteriostatic water
Concentration	2.5 mg/mL
Dose range	200–300 µg (0.08–0.12 mL)
Route	SC injection
Injection site	Abdomen
Storage	2–8°C after reconstitution
Stability	30 days refrigerated

CJC-1295 DAC

Parameter	Specification
Amount	2 mg per vial
Solvent	2 mL bacteriostatic water
Concentration	1 mg/mL
Dose range	30–60 µg/kg (0.03–0.06 mL/kg)
Route	SC injection
Injection site	Abdomen or thigh
Storage	2–8°C after reconstitution
Stability	30 days refrigerated

Melanotan II

Parameter	Specification
Amount	10 mg per vial
Solvent	2 mL bacteriostatic water
Concentration	5 mg/mL
Dose range	250–500 µg (0.05–0.1 mL)
Route	SC injection
Injection site	Abdomen
Storage	2–8°C after reconstitution
Stability	30 days refrigerated

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Common Reconstitution Errors

Error	Consequence	Prevention
Spraying solvent directly onto powder	Foaming, denaturation	Inject along vial wall
Shaking vial	Protein denaturation	Gently swirl only
Using wrong solvent	Instability, incompatibility	Check peptide compatibility
Incorrect volume	Wrong concentration	Calculate carefully
Air bubbles in syringe	Dosing error	Tap and expel bubbles
Using expired peptide	Reduced potency	Check dates
Contamination	Infection risk	Sterile technique
Insufficient wait time	Undissolved material	Wait for full dissolution
Re-using needles	Dull needle, pain	Fresh needle each time
Not labeling vial	Confusion, dosing error	Always label

Multi-Dose vs Single-Dose

Feature	Multi-Dose	Single-Dose
Preservative	Yes (BA)	No
Multi-use	Yes (28 days)	No (one-time)
Infection risk	Low (preserved)	Higher
Reconstitution	Not needed (liquid)	Required
Storage after opening	Room temp or refrigerated	Use immediately

Travel and Transport

Scenario	Recommendation
<8 hours travel	Insulated cooler with ice packs
8–24 hours	Insulated cooler with frozen ice packs
Air travel	Carry-on luggage; original packaging
International	Check customs regulations; letter from prescriber
Power outage	Keep in cooler; discard if >24 hours unrefrigerated

References

• Peptide Reconstitution Guide
• Peptide Storage Conditions
• Peptide Clinical Dosing
• Peptide Safety Data
• Reconstitution Calculator