How to Use Sermorelin: Administration, Reconstitution & Storage (2026)

How to Use / Administration Methods

Sermorelin is administered via subcutaneous (SubQ) injection, typically into the abdominal fat pad, anterior thigh, or posterior upper arm.

Why bedtime dosing matters: The largest physiological GH pulse occurs during early slow-wave sleep, when hypothalamic somatostatin tone drops to its lowest point. Injecting sermorelin 15 to 30 minutes before bed synchronizes exogenous GHRH receptor stimulation with this natural secretory window, maximizing GH output. Administering sermorelin during the day, when somatostatin tone is high, substantially blunts the GH response.

Injection process:

1. Reconstitute the lyophilized powder with bacteriostatic water (see Reconstitution section)
2. Draw the prescribed dose into an insulin syringe (29 to 31 gauge, 0.5 or 1 mL)
3. Clean the injection site with an alcohol swab
4. Pinch a fold of skin and insert the needle at a 45 to 90 degree angle
5. Inject slowly and steadily
6. Withdraw the needle and apply gentle pressure with a clean swab if needed

Injection sites should be rotated to prevent lipodystrophy or local irritation. Administering on an empty stomach (at least 90 minutes after the last meal) is recommended, as elevated blood glucose and insulin can attenuate the GH response.

Reconstitution, Storage & Prep

Sermorelin is supplied as a lyophilized (freeze-dried) powder in sterile vials, typically in 2 mg, 3 mg, or 5 mg quantities. It requires reconstitution before use.

Reconstitution Process:

1. Remove the sermorelin vial and bacteriostatic water from the refrigerator and allow both to reach room temperature (5 to 10 minutes)
2. Wipe the rubber stopper of each vial with a sterile alcohol swab
3. Using a sterile syringe, draw the appropriate volume of bacteriostatic water
4. Insert the needle into the sermorelin vial and inject the water slowly against the glass wall, allowing it to run down gently. Never spray directly onto the powder
5. Swirl the vial gently until the powder is fully dissolved. Never shake, as this can denature the peptide
6. The solution should be clear and colorless; discard if cloudy or if particulate matter is visible

Common reconstitution ratio: 3 mg + 3 mL bacteriostatic water = 1 mg/mL (1,000 mcg/mL). For a 300 mcg dose at this concentration, draw 0.3 mL (30 units on a standard insulin syringe).

Storage Guidelines:

• Unreconstituted powder: Stable at room temperature; refrigeration at 2 to 8°C (36 to 46°F) is recommended for long-term storage (12+ months)
• Reconstituted solution: Must be refrigerated at 2 to 8°C (36 to 46°F); use within 4 to 6 weeks when reconstituted with bacteriostatic water
• Never freeze reconstituted sermorelin. Ice crystal formation can permanently damage the peptide's tertiary structure
• Temperature excursions: If left at room temperature for more than 72 hours after reconstitution, the vial should be discarded
• Protect from light and heat at all times
• Always use bacteriostatic water (containing 0.9% benzyl alcohol) rather than sterile water for multi-dose vials to prevent bacterial contamination