What selank is
Selank is a peptide of seven amino acids, Thr-Lys-Pro-Arg-Pro-Gly-Pro. One abstract describes it as a synthetic derivative of tuftsin, a peptide of four amino acids that the body makes. Another says selank's active component includes tuftsin and three more natural amino acids. FDA lists it as selank acetate and also calls it TP-7.
This page doesn't give a molecular weight, because none of the documents it rests on states one. The calculator doesn't need it.
Where it stands with the FDA
This page found no FDA-approved selank product. A search of DailyMed, the National Library of Medicine's database of drug labels, returned no labels for selank when it was run for this page in October 2026.
Selank reached the FDA as selank acetate, nominated for use in compounding. FDA placed it in category 2, the group it keeps for substances that may present significant safety risks. The nominators later withdrew it. FDA's list of substances nominated under section 503A, updated May 14, 2026, doesn't have it in any category.
FDA's page on category 2, current as of April 22, 2026, still gives the potential risk it identified. It says compounded drugs containing selank acetate may pose a risk of immunogenicity, which is an immune reaction to the drug, for certain routes of administration, because of the potential for aggregation and peptide-related impurities. It also says FDA lacks important information regarding any safety issues raised by selank acetate administered to humans.
This page found no FDA review of selank like the ones the agency has published for semax and other peptides. FDA's review of semax for the July 23-24, 2026 meeting of its Pharmacy Compounding Advisory Committee says an article about selank, which it calls a different peptide, is out of the scope of that evaluation. Selank isn't named on the page for that meeting, or in the minutes of the committee's meetings on October 29, 2024 and December 4, 2024, so this page has no vote to report.
What the published studies compared
This page read the PubMed abstracts of three studies that gave selank to patients. All three papers are in Russian, in the same journal, so only the abstracts were read.
A 2008 paper studied 62 patients with generalized anxiety disorder and neurasthenia. The effect of selank in 30 patients was compared with that of medazepam in 32. The abstract says the anxiolytic effects of both drugs were similar.
A 2014 paper compared selank with phenazepam in 60 patients with phobic-anxiety and somatoform disorders. Its abstract says pronounced anxiolytic and mild nootropic effects of selank were demonstrated.
A 2015 paper compared phenazepam alone, in 30 patients, with selank and phenazepam together, in 40 patients. Its abstract says the combined treatment decreased the level of phenazepam's undesirable side effects.
None of the three abstracts says the study was randomized, blinded or placebo-controlled, and none reports side effects of selank itself.
None of the three abstracts states the dose that was given or how it was given, so this page doesn't either. An abstract is the authors' own short account of a paper. It isn't an FDA finding, and FDA says it lacks important information on safety issues raised by selank acetate in humans.
Storing selank
None of the documents this page rests on gives a storage temperature for selank or says how long it keeps, so this page doesn't either.
The DailyMed search found no label for selank, so nothing official says how long a mixed vial keeps.
Selank dosage calculator questions
How do I turn a selank dose into syringe units?
Divide the dose by the concentration to get millilitres, then multiply by 100. A 5 mg vial mixed with 2 mL is 2.5 mg/mL, so one unit on an insulin syringe holds 25 mcg and ten units hold 250 mcg.
How much bacteriostatic water goes in a 5 mg vial of selank?
There's no single right amount. The water only sets the concentration, and the amount of selank in the vial stays the same. With 5 mg, 1 mL makes 5 mg/mL, 2 mL makes 2.5 mg/mL and 3 mL makes 1.667 mg/mL. Choose the amount that puts your dose somewhere between about 10 and 40 units, where it's easiest to read.
Is selank approved by the FDA?
Not that this page could find. A search of DailyMed, the National Library of Medicine's database of drug labels, returned no labels for selank. Selank acetate was nominated for use in compounded drugs and FDA placed it in category 2, its group for substances that may present significant safety risks. The nominators later withdrew it.
Does this page tell me how much selank to take?
No. This page found no FDA-approved selank product, so it has no approved dose to point to, and the abstracts of the three studies in patients don't state one. The dose box starts empty for that reason, and the chart only converts.
Does this calculator work for a semax and selank blend?
No. It works out one peptide in a vial and can't split a blend. FDA's review of semax says semax products are marketed in combination with selank, and describes one website offering a 50:50 combination of the two as a 2.5 mg/mL injectable product and a 1.25 mg/mL nasal spray. That's a report of what one website offered, not a strength FDA reviewed.
Is selank the same thing as TP-7?
FDA's page lists the substance as selank acetate (TP-7), so TP-7 is another name the agency uses for it.
More peptide calculators by name
The same instrument, set up one peptide at a time. For any other vial, use the peptide reconstitution calculator.