Nasal start (daily total, guide)
Note: Built from plain Semax label doses; the guide says no official dose exists for this variant.
Also known as: NA-Semax Amidate · NA-Semax-Amidate · NASA · N-Acetyl-Semax-Amidate Acetate · Ac-Met-Glu-His-Phe-Pro-Gly-Pro-NH2 · Ac-MEHFPGP-NH2
Updated 42 sources
Every N-Acetyl Semax Amidate protocol on file, 9 in all, labelled by where each number came from.
Note: Built from plain Semax label doses; the guide says no official dose exists for this variant.
Note: The guide says the 1 to 2 a day schedule comes from vendor monographs and community use, not measured pharmacokinetics.
Timing: Morning and early afternoon; evening doses may be too stimulating
Note: The guide says whether tolerance builds is debated and some use it daily without cycling.
Note: The highest guide range we found. The same site lists a molecular weight of 1,007 Da and a wrong sequence, so treat it with care.
Timing: Morning
Note: Single users on r/Nootropics and r/Peptides. One says too much makes them very sleepy; another felt the same effect at 400 mcg as at 600 mcg.
Note: On a premixed spray of 100 mcg per spray, one spray per nostril. The user skips daily use because others report fast tolerance.
Note: The guide calls this range anecdotal and says reliable injection data are scarce even for plain Semax.
Note: The guide gives subQ the same range as nasal and notes absorption may differ.
Note: A reply suggesting a lower start than the 300 mcg the poster planned, on the belief that the amidate is much stronger than Semax. No data back that belief.
Doses shown are what sources report, labelled by origin. Not medical advice.
Diluent: Bacteriostatic water for injection; sterile saline for nasal sprays
No source gives a tested water volume for this peptide. One guide mixes the powder with sterile saline to a 0.1% or 0.3% solution for a spray. Pump volumes vary, so calibrate a homemade spray on a known volume.
Guides run from 200 to 1,200 mcg a day by nasal spray and 500 to 1,000 mcg a day under the skin. Users on Reddit mostly report 200 to 600 mcg in the morning. There is no label or trial dose for this variant.
Guides contradict each other. One says cut doses because of the potency claim and start at 100 to 200 mcg. Another starts at 600 mcg a day, the same scale as plain Semax. With no data either way, the one Reddit reply we found on this suggests starting lower, at 200 mcg.
13 sources, each checked by date. Record updated Oct 24, 2026. Numbers are restated in our own words and labelled by where they came from.
Back to the full N-Acetyl Semax Amidate page for side effects, storage, stacks and legal status.