Semax Dosage: How Pepti Prescribes the Injection, in Units, mL and mg

Every price is all-in, covering medication, physician review, refill management and shipping, with no separate membership fee. Pepti is cash-pay and does not bill insurance. These are the typical printed directions; your own directions are the ones on your vial.

Pepti's directions are written in two forms, millilitres and units, because prescriptions are written in millilitres and insulin syringes are marked in units. On a U-100 insulin syringe, 1 unit is 0.01 mL, so 100 units is 1 mL and 25 units is 0.25 mL. A unit is a volume mark on the barrel, not a measure of how strong the medication is. Units only mean something alongside the concentration printed on the label.

The milligram figure comes from that concentration. Pepti's single Semax vial is supplied at 2 mg/mL, so:

That arithmetic is a way to read a label, not a way to set a dose. A vial labelled 10 mg is not a 10 mg dose: it is twenty 0.5 mg doses. If your label and your syringe seem to disagree, do not dose; message your care team. How long does a peptide vial last explains every number on a vial label in more detail.

People search for a "Semax dosage chart" because online sources quote doses in micrograms, milligrams, drops and units interchangeably, and the numbers only line up if you know the concentration and the route. The chart below is the conversion for a 2 mg/mL vial, drawn with a U-100 insulin syringe, with a column for the 1 mg/mL Semax in the blends. It is math only. It is not a menu of doses, and the only line that applies to you is the one that matches the number printed on your vial.

The rule behind every row: units divided by 100 gives millilitres, and millilitres multiplied by the concentration gives milligrams. A chart from another source, written for a different concentration, will give different milligram figures for the same units. That is the main reason not to dose from a chart, including this one.

Semax in the blends

In a blend, every ingredient is in fixed proportion. One 0.25 mL draw delivers all of them in the ratio the pharmacy compounded, so there is no way to take more Semax and less of something else from the same vial.

Those figures are each vial's concentration multiplied by 0.25 mL. The combined Semax + Selank vial is a separate product, listed as containing 1 mg Semax and 1 mg Selank; its directions are printed on the vial. More on the pairings is in what is Semax + Selank, what is the ELEVATE blend and what is the SYNAPSE blend.

At Pepti's typical directions, one 10 mg vial lasts four weeks:

Four weeks is why refills run every 28 days, one vial per fill. Vials are multi-dose solutions shipped ready to use, refrigerated with ice packs, with sterile syringes and alcohol prep pads. Nothing is mixed at home. Keep the vial in the fridge between doses, and follow the beyond-use date printed on the label, which runs from first puncture. How to store peptides covers storage.

If a vial runs short before the refill, message your care team rather than adjusting anything yourself. If you miss a dose, follow your directions and do not take two doses to make up for one.

Almost all of the human work on Semax comes from Russia, where it is a registered medicine supplied as nasal drops. The studies people quote were done with that intranasal product:

The honest reading is that none of these sets a dose for an injection. The FDA's 2026 review found no published pharmacokinetic work on subcutaneous Semax, so there is no study that converts a nasal dose into an injected one. The populations were stroke and cerebrovascular patients, plus one small mechanistic study in healthy adults, and there is no published trial of Semax for focus or memory in healthy people. That is why your directions come from a physician who has reviewed your intake, not from a study table. What the research has looked at, finding by finding, is in Semax benefits.

Your physician sets your directions after reviewing your intake. Things that can lead to different directions, or a different product, include:

When directions change, the new numbers are printed on the new label. Never carry a number over from a previous fill. Bloodwork is not required for any Pepti treatment. If your physician wants labs for your care, they'll ask through your account.

Semax is described as well tolerated in the Russian clinical series, including in older stroke patients; the 2005 cerebrovascular study made tolerability an explicit endpoint and reported it as good.

The FDA's stated safety concern in its 2026 review was a quality one rather than a known toxicity: an injectable peptide could in principle provoke an immune response if it aggregates or carries impurities. That is a reason to care where a compounded peptide comes from. There is no established interaction list, because the trials that would produce one have not been run. Semax is not used in pregnancy or breastfeeding. Tested athletes should check the current prohibited list for their sport.

Semax was placed in Category 2 of the FDA's 503A bulk drug substances list in 2023 and was no longer on that list as of April 2026. On 24 July 2026 the FDA's Pharmacy Compounding Advisory Committee voted 8 to 5, with one abstention, to recommend adding Semax to the 503A Bulks List, against the recommendation of FDA staff. A committee vote is a recommendation, not a decision, and the FDA's final determination is pending. Semax remains legal to prescribe and dispense. Compounded medications are not FDA approved, and Semax is not approved for anything in the United States. More is in are peptides FDA approved.

Semax cannot be bought legitimately without a prescription. Sites selling it "for research use only" are not accountable for what is in the vial: identity, purity, sterility and concentration are untested, so even the concentration your units chart depends on is unknown. The prescription route:

1. Complete a free online intake covering your history, medications and what you want help with.
2. A physician licensed in your state reviews it, usually within 24 hours.
3. If it is appropriate, a PCAB-accredited, FDA-registered US 503A compounding pharmacy prepares it to that prescription. Lot test results are published at /quality/lab-results.
4. It ships refrigerated with your directions printed on the vial.
5. Your physician stays reachable for questions and dose changes.

Pepti prescribes Semax in every state except Oklahoma, plus DC Step by step: how to get Semax prescribed online. The full product reference is what is Semax. How it compares with neighbouring peptides: Selank vs Semax and Dihexa vs Semax. The wider category is in peptides for brain fog and focus.