[dsip_research_calculator]
The DSIP reconstitution calculator converts the declared peptide mass and the specified final laboratory volume into a concentration expressed in mg/mL and mcg/mL. The tool is intended for non-clinical research calculations.
The calculator is used to explain the mathematics related to the concentration of delta sleep-inducing peptide (DSIP), also known as emideltide. It supports popular declared vial sizes, such as 5 mg and 10 mg, as well as custom amounts used in research.
The calculator does not determine dosage, recommend the amount of solvent, calculate injection volumes or contain instructions for administration to humans or animals. DSIP is not a drug approved by the FDA or EMA, and a universal clinical dosage or reconstitution protocol has not been established.
What does the DSIP reconstitution calculator do?
The DSIP reconstitution calculator determines the nominal concentration of the prepared research solution. It divides the declared mass in the vial by the final solution volume entered by the user.
The calculator presents the result in:
- milligrams per millilitre (mg/mL),
- micrograms per millilitre (mcg/mL).
For example, if a vial is labelled as containing 5 mg and the specified final laboratory volume is 2 mL, the nominal concentration is:
5 mg ÷ 2 mL = 2.5 mg/mL
Since 1 mg is equivalent to 1000 mcg, the result can also be expressed as:
2.5 mg/mL × 1000 = 2500 mcg/mL
This is purely a mathematical example of concentration calculation. It does not imply that 2 mL constitutes an appropriate reconstitution volume, nor that any calculated quantity should be administered.
How to use the DSIP calculator for research purposes?
First, select the declared mass of the vial contents. The calculator includes ready-made options for 5 mg and 10 mg vials. A custom research mass option is also available for laboratory materials labelled with a different quantity.
Next, the specified final volume of the solution in millilitres must be entered. This value must come from a validated institutional research protocol. The calculator does not determine or recommend the amount of bacteriostatic water, sterile water, buffer or any other liquid.
Once the „Calculate concentration” option is selected, the calculator displays the nominal result in mg/mL and mcg/mL. The reset button restores the initial values.
The calculation assumes that the declared mass is correct, the material dissolves completely, there is no significant loss of material, and the entered value corresponds to the actual final volume. The tool is unable to verify these assumptions.
Formula for DSIP concentration
The basic formula used by the calculator is:
Concentration in mg/mL = mass of vial contents in mg ÷ final volume in mL
The result can be converted into micrograms per millilitre using the formula:
Concentration in mcg/mL = concentration in mg/mL × 1000
These formulae are used for calculating concentration, not dosage.
Concentration defines the amount of substance present in a specific volume. Dose, on the other hand, means the amount selected for a specific subject, purpose, route of administration, and schedule of use. These concepts should not be treated as interchangeable.
Example DSIP concentrations 5 mg
The following calculations show how the nominal concentration of the 5 mg vial content changes with various hypothetical final volumes.
| Declared mass in the vial | Hypothetical final volume | Concentration in mg/mL | Concentration in mcg/mL |
|---|---|---|---|
| 5 mg | 1 mL | 5 mg/mL | 5000 mcg/mL |
| 5 mg | 2 mL | 2.5 mg/mL | 2500 mcg/mL |
| 5 mg | 2.5 mL | 2 mg/mL | 2000 mcg/mL |
| 5 mg | 5 mL | 1 mg/mL | 1000 mcg/mL |
These are arithmetic examples, not reconstitution instructions. The appropriate final volume cannot be chosen solely on the basis of the number given on the vial.
Sample DSIP concentrations 10 mg
At the same final volume, a 10 mg vial yields twice the nominal concentration of a 5 mg vial.
| Declared mass in the vial | Hypothetical final volume | Concentration in mg/mL | Concentration in mcg/mL |
|---|---|---|---|
| 10 mg | 1 mL | 10 mg/mL | 10,000 mcg/mL |
| 10 mg | 2 mL | 5 mg/mL | 5000 mcg/mL |
| 10 mg | 2.5 mL | 4 mg/mL | 4000 mcg/mL |
| 10 mg | 5 mL | 2 mg/mL | 2000 mcg/mL |
The 10 mg vial defines the nominal content size of the container, not the established dose. The total declared mass should not be confused with the concentration or the appropriate amount for administration.
Why doesn't the calculator recommend the reconstitution volume?
There is no validated, universal volume of bacteriostatic or sterile water for the reconstitution of commercially available 5 mg or 10 mg DSIP research vials.
Appropriate research formulation depends, among other things, on:
- verified chemical identity of the material,
- forms of the free peptide, salt, counterion and degree of hydration,
- marked peptide content and purity,
- solubility at the planned concentration,
- composition and pH of the solvent,
- compatibility of container and closure,
- chemical and physical stability,
- temperatures and exposure to light,
- microbiological control,
- the aim of the laboratory experiment.
General research into peptide and protein formulation shows that solution stability can be influenced by pH, temperature, oxygen, light, agitation, concentration, buffer composition, and interactions with the container surface [1].
A calculator with information only on the mass of the vial contents and the volume is unable to evaluate these variables.
Why might the declared mass in the vial differ from the verified peptide content?
The designation „DSIP 5 mg” indicates the declared nominal mass of the material. The label itself does not constitute independent confirmation that the vial contains exactly 5 mg of chemically identified DSIP.
Laboratory assessment may require taking into consideration fill accuracy, purity, water content, residual solvents, counterions, peptide form, and analytical recovery.
The percentage purity determined using the HPLC method may not correspond to the total mass of the active peptide contained in the vial. Identity, purity and content are related but distinct quality parameters.
The calculator uses the mass entered by the user. It cannot examine the contents of the vial or correct an incorrect product label.
Research calculations requiring quantitative accuracy should use appropriately characterised material and a validated analytical method.
Why doesn't the calculator give the syringe units?
The markings on the syringe represent volume, not a fixed mass of peptide. The amount of material corresponding to a specific marking varies depending on the concentration of the solution.
Providing the results in syringe units would require combining the target amount, the concentration of the solution and the calibration of the specific device. In the case of an unapproved peptide, it could be misinterpreted as a practical instruction for self-injection.
Therefore, the DSIP calculator ends its calculations at mg/mL and mcg/mL values. It does not specify the amount to inject, the DSIP injection site, or the number of units on the syringe.
Can a calculator determine the DSIP dose based on body weight?
No. A body-weight-based calculator can mathematically multiply it by a selected value expressed in mcg/kg, but it cannot determine whether the applied dosing factor is clinically correct.
Determining a human dose would require controlled clinical trials, pharmacokinetic data, bioavailability information for the specific route of administration, a standardised pharmaceutical formulation, defined safety margins, and appropriate medical monitoring.
This data has not led to the establishment of an FDA- or EMA-approved dosage standard for DSIP.
Neither the doses used in animals nor the quantities utilised in small historical human studies should be directly extrapolated to individual protocols. Differences between species, routes of administration, formulations and the objectives of individual studies preclude such simple comparisons.
Bacteriostatic water and the 28-day misunderstanding
Bacteriostatic Water for Injection contains an antimicrobial preservative, whereas Sterile Water for Injection contains no preservative. Neither of these fluids automatically makes an unapproved investigational product suitable for injection.
The frequently cited 28-day period originates from guidelines concerning correctly manufactured and labelled multi-dose medication vials. It does not prove that a prepared DSIP solution remains chemically stable, retains its activity or is sterile for 28 days.
CDC guidelines indicate that preservatives in multidose vials do not provide complete protection against bacterial contamination and do not protect against viruses [2].
The 28-day rule should not therefore be interpreted as a universal shelf-life for DSIP after reconstitution.
Storage and stability of DSIP following reconstitution
There is no independently validated, universal storage period for reconstituted DSIP for research vials labelled as 5 mg or 10 mg.
Chemical stability and microbiological safety are distinct issues.
A solution can remain visually clear even when the peptide undergoes degradation, oxidation, hydrolysis, adsorption or other chemical transformations. Conversely, a solution containing a chemically intact peptide may become contaminated microbially.
Specific product storage instructions require testing conducted for the exact formulation, concentration, container and storage conditions.
Without such data, the calculator cannot determine the expiry date, shelf life in the fridge, or the permissible number of freeze-thaw cycles.
Turbidity, the presence of particles, leakage or a change in colour may indicate a problem. However, the absence of visible changes does not prove that the solution remains stable and sterile.
What can and cannot be determined by the DSIP calculator?
| Question | Calculator feature |
|---|---|
| Calculation of nominal concentration in mg/mL | Yes |
| Conversion of mg/mL to mcg/mL | Yes |
| Calculations for 5 mg and 10 mg vials | Yes |
| Introduction of custom test mass | Yes |
| Reconstitution volume recommendation | Not |
| Choice of bacteriostatic or sterile water | Not |
| Calculation of the dose for a human or animal | Not |
| Calculation of injection volume or syringe units | Not |
| Confirmation of identity or product purity | Not |
| Confirmation of sterility or endotoxin level | Not |
| Determination of the retention period | Not |
| Determination of the safety or efficacy of DSIP | Not |
Frequently asked questions
Is this a DSIP dosage calculator?
It is more precise to describe this tool as a DSIP concentration calculator. It calculates nominal mg/mL and mcg/mL values based on the stated mass and specified final volume. It does not determine or recommend doses for humans or animals.
How to calculate the concentration of DSIP from a 5 mg vial?
Divide 5 mg by the specified final volume in millilitres. A hypothetical final volume of 2 mL gives a concentration of 2.5 mg/mL, which is 2500 mcg/mL. This example does not constitute a recommendation to use 2 mL.
How to calculate the concentration of DSIP from a 10 mg vial?
10 mg must be divided by the specified final volume in millilitres. A hypothetical final volume of 2 mL yields 5 mg/mL, or 5000 mcg/mL. This is a mathematical example and not a preparation protocol.
How many micrograms are in 5 mg of DSIP?
5 mg is equivalent to 5000 mcg. This conversion describes the nominal total mass, not the recommended dose.
How many micrograms are in 10 mg of DSIP?
10 mg is equivalent to 10,000 mcg. A vial containing this declared amount should not be interpreted as containing a single fixed dose.
Does the calculator state how much bacteriostatic water should be used?
No. There is no universal, regulatory-approved volume of bacteriostatic water for DSIP. The calculator requires the entry of a final volume derived from a validated laboratory protocol.
Can the calculator result be used to calculate the injection?
No. The result is intended solely for non-clinical research calculations. It should not be used as instructions for injection, self-administration or veterinary administration.
Does the calculator confirm whether the DSIP vial contains 5 mg or 10 mg?
No. The calculator performs operations based on the entered value. Confirmation of the actual content requires appropriate analytical testing and documentation.
Disclaimer
The DSIP concentration calculator is intended solely for educational purposes and calculations performed as part of laboratory research. It does not provide human or animal dosages, nor does it constitute medical advice, a reconstitution protocol, or injection instructions. It also does not convert values into syringe units and contains no administration recommendations.
Delta sleep-inducing peptide, also known as DSIP or emideltide, is not approved by the FDA or EMA as a medicine used for sleep disorders or other discussed applications. Available data are limited and include preclinical, mechanistic and small historical studies involving humans.
Product identity, purity, concentration, sterility, endotoxin level, compatibility and stability must be independently confirmed under a validated institutional protocol.
The calculator must not be used for preparing or self-administering DSIP.
References
[1] Manning, M. C., Chou, D. K., Murphy, B. M., Payne, R. W., & Katayama, D. S. (2010). Stability of protein pharmaceuticals: An update. Pharmaceutical Research, 27(4), 544–575. https://doi.org/10.1007/s11095-009-0045-6
[2] Centres for Disease Control and Prevention. (2024). Preventing unsafe injection practices. https://www.cdc.gov/injection-safety/hcp/clinical-safety/index.html
[3] National Center for Biotechnology Information. (2026). PubChem compound summary for CID 68816, delta sleep-inducing peptide. PubChem. https://pubchem.ncbi.nlm.nih.gov/compound/68816