DSIP
Delta Sleep-Inducing Peptide
A nonapeptide isolated from rabbit brain during slow-wave sleep, studied for sleep architecture and, unexpectedly, for withdrawal symptoms.
Last reviewed · 2 references
How it works
DSIP was identified in the cerebral venous blood of rabbits in delta-wave sleep. Its mechanism remains poorly resolved — it appears to modulate rather than sedate, with effects on corticotropin release, on the HPA axis, and on stress responses. Some of the most interesting human work is in opiate and alcohol withdrawal rather than in insomnia.
Early human data. Some human data exists, usually small, open-label, or from a single research group.
What the research reports
- Improved sleep onset and reduced night waking in small human studies of chronic insomnia
- Reduced withdrawal symptoms in opiate and alcohol withdrawal studies
- Effects on stress-hormone regulation
- Analgesic effects in some reports
What it has not been shown to do
- Results across sleep studies are inconsistent
- Not established as a treatment for any sleep disorder
- Mechanism remains genuinely unclear after decades
Dosing reference
Study amounts vary widely; community protocols commonly cite 100–300 mcg before bed.
Calculate my dose for DSIP- Routes studied
- Subcutaneous, Intranasal
- Half-life
- Very short in plasma — around 7–15 minutes
- Cycle length in the literature
- Short courses; continuous nightly use is not studied
Working out a draw volume from a vial? Use the free reconstitution calculator.
Side effects and contraindications
Reported side effects
- Headache
- Grogginess
- Paradoxical alertness in some users
Do not use if
- Pregnancy and breastfeeding
- Do not combine with sedatives or alcohol
- Withdrawal management requires clinical supervision, not a research peptide
The practice that shares the mechanism
Sleep is where nearly every mechanism on this site is either consolidated or wasted. But a compound cannot fix a schedule: light timing, temperature and a consistent wake time move sleep architecture more reliably than DSIP does in the published studies.
What amplifies it
- Fixed wake time — the single strongest lever on sleep architecture
- Morning light exposure to anchor the circadian phase
- Cool, dark room; deep sleep is temperature-dependent
Mechanism hubs
- Mitochondria & mental energyWhy depression tracks with impaired cellular energy production, and what mitochondrial peptides, nutrition and sleep actually do about it.
- HPA axis & stressHow chronic stress dysregulates cortisol rhythm, what that does to mood and sleep, and the peptides and practices that act on it.
Stacks that include it
Common questions
- No, and that is what makes it interesting. It does not appear to knock people out; the studies describe modulation of sleep architecture rather than sedation. The results are also inconsistent enough that some researchers have questioned whether the effect is real.
- Some of the strongest DSIP findings came from studies of opiate and alcohol withdrawal, likely through its effects on the stress axis. Withdrawal is a medical event that requires supervision — this is context for understanding the research, not a protocol.
Sources & evidence notes
Some human data exists, usually small, open-label, or from a single research group.
Confidence score 7/100
Preliminary
Mechanism only. Nothing here establishes that a person would feel anything.
- 1.
European Neurology, 1986 · Source (opens in a new tab)
In vitroLimited gradeCells or tissue in a dish. Tells you about mechanism, not about outcomes. - 2.
Pharmacology Biochemistry and Behavior, 1984 · Source (opens in a new tab)
In vitroLimited gradeCells or tissue in a dish. Tells you about mechanism, not about outcomes.