Question 1

What is the dosing protocol for Semax?

Accepted Answer

One published protocol states a quantity, a frequency and a duration together, and it belongs to a single condition. A 2018 Russian study enrolled one hundred and ten patients after ischemic stroke, with a mean age of 58. Standard regimen of semax included 2 courses (6000 mcg/day) for 10 days with 20 day interval. So that is six thousand micrograms a day, ten days on, twenty days off, then ten days again. Administration of semax, regardless of the timing of rehabilitation, increased BDNF plasma levels in those patients, BDNF being a protein involved in the survival and growth of nerve cells. Read the word standard carefully, because it describes the arm of that investigation rather than a schedule anyone established. A 2026 review that searched regulatory databases lists optimal dosing regimens among the significant knowledge gaps it identified across this class of compounds. A protocol run once in stroke rehabilitation is a documented experiment, not a general schedule.

Question 2

What does Semax nasal dosage mean, and what is 1%?

Accepted Answer

The nasal figure people quote is a concentration, and a concentration is only half of an amount. A 2018 imaging study in healthy volunteers describes its administration precisely. Resting state fMRI was carried out 3 times: directly before and 5 and 20 min after intranasal 1% Semax (14 subjects) or placebo (10 subjects). One per cent means ten milligrams of peptide in every millilitre of liquid. What the paper does not record is how many drops went in, so the quantity each volunteer received cannot be worked out from it. A second study of 52 healthy participants reports the same gap, describing resting-state fMRI carried out before, after 5 and 20 min of the injection of either Semax, or Selank, or placebo. Earlier Russian eye work used the route without a figure as well: in group 1 semax was administered intransally as nasal drops, in group 2 by endonasal electrophoresis, and group 3 was control. Three human studies, one route, and no stated volume between them.

Question 3

What amounts were used in the animal studies?

Accepted Answer

Four rat studies carry figures, and between them they span a hundredfold range in three different units. The widest test used intraperitoneal administration ACTH(4-7)-PGP in doses of 5, 50, 150, and 450 μg/kg to Wistar male rats. Intraperitoneal means into the belly, and a behaviour study used the nose instead. Semax was injected intranasally in doses of 50 and 500 microg/kg 15 min before the testing. A 2006 brain study stayed at the low end, where a single application of Semax (50 microg/kg body weight) gave a maximal 1.4-fold increase of BDNF protein levels in the rat hippocampus. The fourth changes the unit. Stressed and control male adult Sprague-Dawley rats received daily intraperitoneal injections of saline or a low dose (60 nmol/kg of body weight (BW)) of Semax. Nanomoles per kilogram count molecules rather than mass, so that figure cannot be set beside the others until somebody converts it.

Question 4

Is there a Semax dosage chart?

Accepted Answer

Not a published one, and the reason is visible in the units rather than hidden in the literature. The human stroke work is written in micrograms per day. The imaging work is written as a percentage concentration. The rat work is written in micrograms per kilogram, except for the study that uses nanomoles per kilogram. A chart requires one axis that every row shares, and this literature does not provide one. The single experiment that does read like a chart is a rat study testing doses of 5, 50, 150, and 450 μg/kg before a stress model, which is a dose-response design rather than a schedule for anybody. A 2026 review searching FDA and WADA records lists optimal dosing regimens among the significant knowledge gaps it identified. The published total is one stated human regimen, in one condition, from one country, and a chart built on that is mostly invention.

Question 5

What is a Semax cycle, and how long is one?

Accepted Answer

One published course has a defined shape, and three others are single administrations or short runs attached to an experiment. The defined one is the stroke regimen. Standard regimen of semax included 2 courses (6000 mcg/day) for 10 days with 20 day interval, which is the only on and off pattern in the published human record. Twenty days without material, between two ten-day courses, is a specific design decision and the paper does not explain why that interval was chosen. The animal courses are shorter and simpler. A gastric study in albino rats used postoperative treatment with Semax for 5 days after an injury was induced. A hippocampal study used a single application of Semax (50 microg/kg body weight) and read the result from one administration. None of those durations was compared against an alternative, so the literature contains examples of cycles rather than evidence about them.

Question 6

What does the literature show about a Semax injection dose?

Accepted Answer

Every injected figure on record comes from a rat. The split between routes runs straight down the middle of this subject. The injected work is animal, and it goes into the belly. Semax administered intraperitoneally in a dose of 50 microg/kg one hour before exposure to ulcerogenic factors protected gastric mucosa from damage in albino rats. A 2024 depression model gave rats daily intraperitoneal injections of a low dose (60 nmol/kg of body weight (BW)). A 2024 gene study used the same route, with rats receiving intraperitoneal administration of ACTH-like peptides ACTH(4-7)PGP (Semax). The human work went up the nose. The imaging volunteers received intranasal 1% Semax, and the Russian eye studies used nasal drops or a small electric current. No study among the research behind this page has given Semax to a person by a shot under the skin. So an injected human figure crosses both a species gap and a route gap, rather than resting on anything measured.

Question 7

What is known about N-Acetyl Semax Amidate?

Accepted Answer

Almost nothing about amounts. The one paper that bears on it is laboratory chemistry, not a protocol. A 2016 study looked at what acetylation does to the molecule. N-terminal amino group acetylation (Ac-Semax) modulates the chemical and biological properties of parental peptide, modifying the ability of Semax to form complex species with Cu(II) ion. In plain terms, the altered version binds copper differently. The practical finding runs the other way: Semax acetylation did not protect from Cu(II) induced toxicity on a SH-SY5Y neuroblastoma cell line, a human nerve-cell line grown in a dish. That is a result from glassware. No study among the research behind this page attaches an amount, a route or a schedule to an acetylated or amidated form. So a figure quoted for that version is not a bigger or smaller Semax figure. It is a number for a molecule that no paper we cite has dosed in print, rather than a scaled copy of anything above.

Question 8

How much bacteriostatic water do you mix with Semax?

Accepted Answer

That depends entirely on the concentration being aimed at, and the published record supplies exactly one concentration to aim at. The imaging studies used intranasal 1% Semax. One per cent means one gram in a hundred millilitres, which works out at ten milligrams in every millilitre. So a vial holding 30 mg of dry material would need 3 mL of liquid to reach that concentration, and a vial holding 10 mg would need 1 mL. The arithmetic is the same in either direction: divide the quantity of material by the volume of water to get the concentration. What that calculation produces is a concentration matching one published study, and nothing more. It does not establish how much liquid should then be used, and the imaging papers never recorded that figure either. Matching a concentration from a study and matching what the study administered are separate things, and only the first is available here.

Question 9

How do percent, mg and mcg relate on a label?

Accepted Answer

Three ways of writing the same quantity turn up on this compound, and they are easy to confuse because two of them describe concentration and one describes an amount. A percentage describes concentration. Intranasal 1% Semax is ten milligrams of peptide in each millilitre of liquid, and that figure says nothing about how much liquid is involved. Milligrams per millilitre describe the same thing in different words, so 1% and 10 mg/mL are interchangeable labels. Micrograms describe an amount of peptide, with no liquid implied. The stroke regimen of 6000 mcg/day is six milligrams of peptide a day, because one milligram is a thousand micrograms. Converting between the two columns requires a volume, and that is the number missing from most of the published work on this compound.

Question 10

How was Semax administered in the studies?

Accepted Answer

Four routes appear across the literature, and the human and animal work barely overlap. The human studies used the nose. Russian eye work split its patients by delivery: one group was administered intransally as nasal drops, a second by endonasal electrophoresis. That second method drives material through tissue with a small electric current. The imaging studies used intranasal 1% Semax and gave no further detail. The rat work mostly used a shot into the belly, as in the study giving doses of 5, 50, 150, and 450 μg/kg to Wistar male rats. A 2005 review raises a fourth option, noting that the ability of glyprolines to pass gastro-enteric tract barriers opens ways to per-oral administration of this new group of drugs such as semax, selank and their fragments. That is a point about stability in the gut, not a swallowed protocol anybody has run.

Question 11

How much does Semax cost?

Accepted Answer

No source among the research behind this page records a price, and the figure that would actually drive one is the length of a course rather than the price of a vial. The only published human course is the stroke regimen: 2 courses (6000 mcg/day) for 10 days with 20 day interval. Six milligrams a day across twenty dosing days is a hundred and twenty milligrams of peptide, which is a quantity a reader can at least compare against a vial size. Nothing among the research behind this page establishes that any shorter or longer course does anything. So the honest position on cost is that the denominator is missing. A 2026 review searching regulatory databases lists optimal dosing regimens among the significant knowledge gaps across this class of compounds, and a price per milligram means little when the number of milligrams anybody should buy has not been established in a published trial.

Question 12

Why do the reported protocols vary so much?

Accepted Answer

Four reasons, and the language of the literature is the one most readers never see. Most of the clinical work is Russian and published in Russian journals, including the 2000 ophthalmology paper describing a new Russian drug semax. A reader outside that literature sees fragments of it in translation, which is part of why the figures circulating in English have no consistent source behind them. The second reason is the endpoint, which ranges from stroke rehabilitation to optic nerve disease to resting brain imaging in healthy volunteers. The third is the form, because the acetylated version studied in 2016 is chemically a different molecule from the Semax in the clinical papers. The fourth is the state of the evidence overall. A 2026 orthopaedic review covering semax among other neuroactive peptides concludes that although preclinical studies are promising, there is a current lack of clinical trials, and a 2026 gerontology review lists optimal dosing regimens among its significant knowledge gaps.

Rat study	Route	Amount studied (per kg, rats)
ACTH(4-7)-PGP dose-range study	Into the belly	5, 50, 150 and 450 μg/kg
Behaviour study	Into the nose, 15 min before testing	50 and 500 μg/kg
2006 brain study	Single application	50 μg/kg
Stress study (Sprague-Dawley rats)	Into the belly, daily	60 nmol/kg, a count of molecules rather than mass

Semax protocols in the published literature