Cortagen (20 mg vial)

Protocol Overview

Concise summary of the regimen.

Dosing & Reconstitution

One subcutaneous injection daily, preferably in the morning, held at the same hour each day for consistency. At 10 mg/mL every draw falls between 10 and 20 units, which a 50-unit syringe reads more precisely than a 100-unit barrel. Sites are rotated systematically across abdomen, thighs, and upper arms to avoid local irritation and lipohypertrophy.

Reconstitution Steps

1. Draw 2.0 mL bacteriostatic water with a sterile syringe.
2. Inject slowly down the vial wall; avoid foaming.
3. Gently swirl until dissolved (do not shake).
4. Label with date and concentration; refrigerate at 2 to 8 °C, protected from light. At 10 mg/mL, 1 unit = 0.01 mL » 100 mcg on a U-100 insulin syringe.

Storage Instructions

Proper storage preserves peptide quality.

• Lyophilized: store at -20 °C for long-term holding; 2 to 8 °C is acceptable short-term.
• Reconstituted: refrigerate at 2 to 8 °C, use within 4 weeks, and avoid freeze-thaw.

• Allow vials to reach room temperature before opening to reduce condensation uptake.
• Keep the reconstituted vial out of light and in the body of the refrigerator rather than the door, where temperature swings are largest.

Supplies Needed

Planning is based on a 4 week daily course averaging 1,500 mcg per day, which is 10.5 mg of peptide per week.

Peptide Vials (Cortagen, 20 mg vial):

• A 4 week cycle totals about 42 mg, roughly 3 vials of 20 mg; an 8 week cycle totals about 84 mg, roughly 5 vials.

Insulin Syringes (U-100):

• Per week: 7 syringes, one per daily injection.
• Full cycle: 28 syringes over 4 weeks, or 56 over 8 weeks.

Bacteriostatic Water (10 mL bottles):

• Each 20 mg vial takes 2.0 mL, so one 10 mL bottle of bacteriostatic water covers 5 vials, enough for both the 3 vials of a 4 week cycle and the 5 vials of an 8 week cycle.

Alcohol Swabs:

• Per injection: 2 swabs, one for the vial stopper and one for the skin.
• Full cycle: 56 swabs over 4 weeks (one 100-count box), or 112 over 8 weeks (two boxes).

Important Notes

Practical considerations for consistency and safety.

• Use a new sterile insulin syringe for every injection and dispose of it in a sharps container.
• Rotate injection sites to reduce local irritation.
• Inject slowly and wait a few seconds before withdrawing the needle.
• Log the daily dose, time, and site rotation to keep the course consistent across 4 to 8 weeks.
• A reconstituted 20 mg vial holds 20 doses at 1,000 mcg or 10 doses at 2,000 mcg, so a vial opened at the higher dose is used up inside the 4 week post-reconstitution window.
• Regulatory Note: Cortagen carries no FDA approval for human therapeutic use and is supplied for research purposes only, not for human consumption.

How This Works

Cortagen (Ala-Glu-Asp-Pro) is a synthetic tetrapeptide derived from amino acid analysis of the natural brain cortex preparation Cortexin. It acts as a gene expression modulator and epigenetic regulator, influencing synthesis of proteins involved in neuronal growth, differentiation, and stress resistance. Preclinical studies show that Cortagen can upregulate neurotrophic factors, reduce oxidative stress markers, and accelerate peripheral nerve regeneration, raising nerve fiber growth rate and conduction velocity by 27 to 40% in injury models. In chronic cerebral ischemia models it improved behavioral recovery and protected against oxidative damage.

Benefits & Side Effects

Observations from the published record.

• Supports peripheral nerve regeneration, with improved growth rate and conduction velocity in injury models.
• Shows neuroprotective effects in ischemia models by reducing lipid peroxidation and preserving antioxidant enzyme activity.
• May enhance cognitive function and memory through promotion of synaptic plasticity and neurite outgrowth.
• Modulates gene expression in cardiac and neural tissues, with broad regulatory effects.
• Generally well tolerated, with no significant adverse effects observed at therapeutic doses in animal studies.
• Occasional mild injection-site reactions may occur with subcutaneous administration.

Lifestyle Factors

Complementary strategies for best outcomes.

• Maintain a nutrient-rich diet with adequate protein, omega-3 fatty acids, and antioxidants.
• Engage in regular physical activity and cognitive exercises to reinforce neuroplasticity.
• Prioritize quality sleep and stress management to support cellular repair and recovery.
• Limit alcohol and other neurotoxic exposures that work against neural repair over a 4 to 8 week course.

Injection Technique

General subcutaneous guidance from clinical best-practice resources.

1. Clean the vial stopper and skin with alcohol; allow to dry.
2. Pinch a skinfold; insert the needle at 45 to 90 degrees into subcutaneous tissue.
3. Do not aspirate for subcutaneous injections; inject slowly and steadily.
4. Wait 5 to 10 seconds before withdrawing; dispose of syringe in sharps container.
5. Rotate sites systematically (abdomen, thighs, upper arms) to avoid lipohypertrophy.

References

Source citations for further reading.

1. Effect of tetrapeptide cortagen on regeneration of sciatic nerve (PubMed).
2. Cortexin and Cortagen as correcting agents in chronic brain ischemia (PubMed).