PinnyPeptide

DSIP vs Orexin-A

Side-by-side comparison: effects, dosing ranges, side effects, regulatory status, and reconstitution.

Peptide A

DSIP

Sleep

Endogenous nonapeptide that promotes delta wave sleep and modulates neuroendocrine stress responses.

Peptide B

Orexin-A

Sleep

Hypothalamic wake-promoting neuropeptide — the molecule lost in narcolepsy type 1.

Typical vial

5 mg

Typical dose

100-300 mcg

Half-life

~7-8 minutes (rapidly degraded by aminopeptidases)

FDA status

Not FDA approved for human use. No clinical trials submitted…

Typical vial

5 mg

Typical dose

20-80 (intranasal) mcg

Half-life

~30-60 minutes (CSF)

FDA status

Not FDA approved as a therapeutic. Orexin receptor antagonis…

DSIP effects

  • Promotes delta wave (deep) sleep without suppressing REM
  • Modulates HPA axis to reduce cortisol during stress
  • Influences pain perception through opioid system interactions
  • May normalize blood pressure in hypertensive states
  • Exhibits neuroprotective properties under oxidative stress

Orexin-A effects

  • Promotes wakefulness and arousal
  • Activates OX1R and OX2R receptors
  • Stimulates monoaminergic arousal centers
  • Increases attention and cognitive performance during wake
  • Modulates feeding behavior and reward processing

DSIP side effects

  • Daytime drowsiness if taken at inappropriate times
  • Mild headache (uncommon)
  • Transient hypotension (rare)
  • Vivid dreams (frequently reported anecdotally)

Orexin-A side effects

  • Insomnia / sleep disruption (intended effect)
  • Anxiety or jitteriness at high doses
  • Increased blood pressure and heart rate (transient)
  • Theoretical: enhanced reward sensitivity / addiction risk
  • Limited safety data for chronic human use

DSIP dosing ranges

Sleep support

100-300 mcg · Once daily, 30-60 minutes before bedtime (SubQ) · 2-4 weeks

Stress and cortisol modulation

100-200 mcg · Once daily (SubQ) · 2-4 weeks

Orexin-A dosing ranges

Intranasal arousal research

20-80 mcg · As needed for wakefulness · Acute use

Animal research

Variable per protocol · ICV or IV · Per protocol

Full DSIP guide → Full Orexin-A guide →

DSIP vs Orexin-A — common questions

What is the difference between DSIP and Orexin-A?

DSIP: Endogenous nonapeptide that promotes delta wave sleep and modulates neuroendocrine stress responses. Typical dose 100-300 mcg. Orexin-A: Hypothalamic wake-promoting neuropeptide — the molecule lost in narcolepsy type 1. Typical dose 20-80 (intranasal) mcg. Both fall under the Sleep category.

Can you stack DSIP and Orexin-A?

Stacking DSIP with Orexin-A is a protocol-design question best raised with a clinician — it depends on your goal, current bloodwork, and whether both peptides target overlapping mechanisms. Both peptides should be tracked independently with separate injection sites and timing. PinnyPeptide supports multi-peptide stacks with automatic injection site rotation.

Which is dosed more frequently, DSIP or Orexin-A?

DSIP is typically dosed: Once daily, 30-60 minutes before bedtime (SubQ) for Sleep support; Once daily (SubQ) for Stress and cortisol modulation. Orexin-A is typically dosed: As needed for wakefulness for Intranasal arousal research; ICV or IV for Animal research.

Are DSIP and Orexin-A FDA approved?

DSIP: Not FDA approved for human use. No clinical trials submitted for FDA review. Orexin-A: Not FDA approved as a therapeutic. Orexin receptor antagonists (suvorexant, lemborexant, daridorexant) are FDA-approved for insomnia.

Related peptide comparisons

dsip vs epithalondsip vs orexin-bdsip vs pinealondsip vs pt-141dsip vs selankorexin-a vs orexin-b

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