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N-Acetyl Selank Amidate vs N-Acetyl Semax Amidate

Updated 9 sources

Key differences

  1. 1Same two caps on a different parent: Selank comes from tuftsin and is used for calm, Semax from ACTH and is used for focus.
  2. 2Users take the Selank version for anxiety or sleep and the Semax version for drive.
  3. 3Same two caps on a different parent: Semax comes from ACTH and is used for focus, Selank from tuftsin and is used for calm.
  4. 4Users take the Semax version for drive and the Selank version for anxiety or sleep.

Side by side

Facts from each record, in the same words as their own pages.
N-Acetyl Selank Amidate and N-Acetyl Semax Amidate side by side
N-Acetyl Selank AmidateN-Acetyl Semax Amidate
Category
  • Cognitive, Sleep
  • Cognitive
Evidence
  • No human trials
  • No human trials
FDA status
  • Not FDA approvedRegulatory
  • Not FDA approvedRegulatory
WADA
  • Not confirmed
  • Not confirmed
Half-life
  • Not measured. One guide estimates 10 to 20 minutes, vs 2 to 5 minutes for Selank.Competitor guide
  • Not measured. Another guide claims 4 to 6 hours.Competitor guide
  • Not measured. One guide estimates about 30 to 45 minutes, longer than Semax.Competitor guide
  • Not measured. Other guides claim several hours, or 2 to 10 hours vs 0.5 to 2 for Semax.Competitor guide
Routes
  • Nasal, Subcutaneous injection
  • Nasal, Subcutaneous injection
Forms
  • Nasal spray, Vial (powder)
  • Nasal spray, Vial (powder)
Reported doses
  • 100 to 900 mcg (nasal)
  • 500 to 750 mcg (subcutaneous injection)
  • 200 to 1,200 mcg (nasal)
  • 200 to 1,000 mcg (subcutaneous injection)
Most cited frequency
  • 2 to 3 times a day at regular intervals (600 to 900 mcg a day)
  • 1 to 2 times a day
Vial sizes
  • 30 mg, 10 mgCommunity-reported
  • 30 mgCommunity-reported
Mixed vial keeps
  • Fridge at 2 to 8 C, out of light.Vendor guide
  • Fridge at 2 to 8 C, use within 14 to 21 days.Competitor guide
Protocols on file
  • 6
  • 9

Doses shown are what sources report, labelled by origin. Not medical advice.

Read each in full

Sources

9 sources, each checked by date. Record updated Oct 24, 2026. Numbers are restated in our own words and labelled by where they came from.

Competitor guide5

  1. NA-Semax Amidatepeptidedeck.com · checked Oct 24, 2026
  2. Selank dosage guide (N-Acetyl Selank Amidate section)peptidesexplorer.com · checked Oct 24, 2026
  3. NA-Selank Amidatepeptide-db.com · checked Oct 24, 2026
  4. NA-Semax Amidatebodyhackguide.co · checked Oct 24, 2026

Community-reported2

  1. r/Nootropics: NA-SEMAX-Amidate experience (comment)r/Nootropics · checked Oct 24, 2026
  2. r/Nootropics: NA-SEMAX-Amidate experiencer/Nootropics · checked Oct 24, 2026