Page last checked 2026-08-13

Tuftsin analogue heptapeptide (research compound) · safety

Selank side effects

No controlled human trial has published a side-effect rate or safety profile for Selank. Here is what is actually known instead, and what that gap does and does not tell you.

Selank is a peptide seven amino acids long. It is a small immune fragment called tuftsin, with a tail added to slow its breakdown. Sellers market it for anxiety, stress and calm focus.

Russian groups gave it to patients with anxiety disorders and compared it with two older sedatives. Those studies never said how much anyone received. No source gives a human dose. English reviews describe it as well tolerated, but they trace that claim to an experiment in rats.

No completed controlled human trial has shown which dose works for Selank. There is no study-backed human dosing program to publish. Animal quantities are not converted into a human recommendation.

no human dose shown to work

Further down: when to get medical help · questions

Medically reviewed by Jennifer Montecillo, MD · non-practicing medical reviewerReviewed 2026-08-13

At a glance

Common reactions listed

None published

Serious reactions listed

None published

Boxed warning

No label exists

Strongest source

no human dose shown to work

Nothing measured is not the same as nothing to find — the section below is about that difference.

When to seek medical care

Because no controlled human safety profile has been published for this compound, there is no evidence-based list of warning signs specific to it. That removes the early warning, not the risk. Any new, severe or lasting symptom belongs with a clinician. Tell them exactly what was taken.

EmergencySome symptoms should not wait for an appointment. Call emergency services (911 in the US) if they are severe, getting worse fast, or involve trouble breathing, chest pain, fainting or confusion.

3Read deeperTiming, evidence limits, and product context

Why there is no Selank side-effect profile here

There is no side-effect table on this page because there is no controlled human safety profile to build one from — and an empty table is more honest than a plausible one.

A published side-effect profile is not a summary of what people have noticed. It is the output of a specific process: a controlled trial enrolls a defined group and records every event, whether or not it looks related. It compares those rates against a control group, then publishes the result against a plan registered before the first dose. Where that process has not produced a profile, the output does not exist. Nothing stands in for it — not seller literature, not clinic protocols, not forum threads.

So the absence says something about the evidence, not about the compound. A profile nobody has measured is not a clean profile; it is an unmeasured one. Those two get confused constantly, and the confusion always runs in the direction that flatters the compound.

It is worth being blunt about the asymmetry. Rare and serious reactions are exactly the ones that scattered, self-reported experience is worst at catching. They are uncommon by definition, they can take time to appear, and they are easy to blame on something else.

The people who get them are also the least likely to come back and post an update. What shows up first in an unstudied compound is the mild and the immediate. That is a fact about how the reports get collected, not evidence about the compound.

The missing profile takes the rest of the scaffolding with it. With no approved label there is no list of who should avoid it, no documented interactions and no monitoring plan. There is no ceiling dose, and no channel carrying reports back to a regulator. Anyone taking an unapproved compound is outside all of those at once — and silence from a system that does not exist is not reassurance.

Selank has been given to patients. Nobody wrote down how much.

This absence has an unusual shape. It is not that no one has taken it, and not that no one has studied it. Several groups ran comparisons in real patients. None of them printed a quantity, so there is nothing to attach a harm to.

The safety profile you will find online belongs to rats

Search this peptide and a calm account appears quickly. It is described as safe, non-sedative and non-addictive. Mild drowsiness or a dry mouth are the worst of it.

That account was traced back through the reviews that print it. The source they cite is an experiment in rats. No human safety dataset stands behind any of it.

A reassuring profile with no human source is worse than no profile at all. It answers the question a reader came with, and the answer is not about people.

One list of side effects is the wrong drug’s

A list of unwanted effects circulates attached to this peptide. Attention and memory trouble, sedation, longer sleep, sexual problems, emotional flatness.

Those belong to the sedative it was tested alongside. The study in question was measuring whether adding the peptide reduced that drug’s effects, and reported that it did.

So the list is real, it was published, and it describes something else. Copying it onto this page would invert what the study found.

Published studies, never registered, and never a quantity

The human work was indexed and is readable in summary. Patients with anxiety conditions were compared against two older sedatives, and one report describes an effect still present a week after the last dose.

No trial was registered. That does not prove the work never happened, but it means there is no public trial record to check.

What is missing is narrower and stranger. Every one of those reports names its patients and its scales, and none of them names an amount.

What the absence does and does not mean

Four readings of an empty safety record go around. Each one turns a missing measurement into reassurance.

The claim	What the evidence shows
Nothing serious has been reported.	Nothing has been systematically collected. A report needs a system that receives it, strips out duplicates and counts it. For an unapproved compound there is no such system, so silence is what you would get either way.
The studies look clean.	The published work is overwhelmingly in animals or too small and uncontrolled to produce a safety rate. Animal findings do not carry over to people at human doses over human timescales, and uncontrolled exposure supplies no comparison group or denominator.
People have used it for years.	Informal use is not monitoring. Years of unmeasured use produce familiarity and confidence. They do not produce a denominator, a comparison group, or a rate.
People seem to handle it well.	How well people handle a compound is measured against a control group. Without that comparison, the claim is only the writer’s impression.

No human safety profile has been published for this compound. If that changes, the results should be reported with the study size, comparison group and citation—not filled in with assumptions.

Common questions

Does Selank have known side effects?

No controlled human study has published a side-effect rate or safety profile. That describes the missing evidence, not the compound: unmeasured does not mean safe.

Is Selank safe?

The published human evidence cannot answer that either way. Reliable safety estimates need systematic collection, a total number treated and a comparison group; none is available here.

What should someone do about symptoms after taking an unapproved compound?

Take the symptom to a clinician, and say exactly what was taken, how much and for how long. Clinicians assess symptoms without needing an approved label to exist, and leaving out the detail removes the one piece of context that changes what they look for.

The schedule these reactions were recorded against, the comparisons, and the sourcing rules behind every grade on this page.

Selank — class, half-life and regulatory standing

No approved brand name is listed for selank.

Doses per 10 mg selank vial, on the calculator

The nearest syringe line to the target, and the rounding error it introduces for selank.

The generic calculator behind the selank one

Vial strength and water volume in and the exact mark out, with selank as context

Where selank stands with the regulator, and when

Approval status, proceedings and the date attached to each, with selank as one example

The full index behind the selank page

From label-backed entries to compounds with no established human dose, including Selank

How each selank claim is checked

Source definitions and the checks that enforce them, including the source for selank.