Selank Dosage Reported in Studies
What do the Selank dosage numbers tell you?
A nose spray and a shot reach the body differently. This page lists Selank dosage from animal work and one human trial. Each amount belongs only to its study. The numbers don't set an amount for your care.
The FDA and the European medicine agency haven't cleared Selank. The Selank approval page explains what that means. Animal studies span three decades. Human amount facts come from one trial. That is thin support for you and your doctor.
Rat studies used belly shots or shots under the skin. The human trial gave Selank through the nose. The whole Selank chain stayed in blood about 3–5 minutes. Smaller pieces may explain why some effects lasted longer.
Which amounts were tested in animals?
Rat and mouse studies tested a wide spread of amounts. Each line belongs to one kind of test. A rat amount can't be turned into a human amount here.
- 80–1,000 micrograms per kilogram by belly shot. This range appeared in stress, learning, and liver work [15][16].
- 300 micrograms per kilogram. Learning work used this amount [11]. An alcohol study did too [10].
- 0.3 milligrams per kilogram in one shot. Rats had a 39.6% lower total morphine-withdrawal score [9].
- 300 micrograms per kilogram per day for 5 days. Two kinds of mice got nose doses or belly shots [7].
- 100–2,000 micrograms per kilogram. Rat studies used this range for low-mood signs and brain chemicals [14].
In 2020, one stress study compared 80, 250, and 750 micrograms per kilogram. The rats' bowels fared much the same at all three amounts [15]. That one test suggested a wide useful range. It says nothing firm about people.
What Selank amount did the human trial test?
In 2008, the only published human trial had 62 people. Selank went into the nose at 2,700 micrograms per day. It was a 14-day course [5]. Medazepam, an older anxiety pill, was the comparison. Its paper summary calls that amount standard but gives no number.
No human study slowly raised the amount to find the best one. No blood study tracked where Selank went or how fast. Russia approved a prescription nose spray in 2009. PubMed has no English label with its amount details.
What does Selank dosage for anxiety show?
The human anxiety trial used 2,700 micrograms per day through the nose. Treatment lasted 14 days. Three forms showed lower anxiety scores [5]. One trial can't guide anyone's care.
In 2017, stressed rats got Selank with diazepam at 1 milligram per kilogram. The pair eased more fear than either drug alone [6]. Other rat tests used mazes, open boxes, or swimming. Helpful amounts ran from 80 to 1,000 micrograms per kilogram by belly shot.
A route study added a warning. One kind of mouse got 300 micrograms per kilogram over 5 days [7]. Belly shots eased fearful acts, but nose doses didn't. The way Selank entered mattered as much as the amount.
Why does Selank leave the blood so fast?
Whole Selank has a blood half-life of about 3–5 minutes. Half-life is the time for half to leave. Proteins in blood cut the chain apart fast. Its added protein parts make it last longer than tuftsin. Tuftsin lasts only seconds.
The short blood time doesn't match the longer animal effects. Smaller pieces may still work after the chain breaks. In a rat stomach-ulcer study, Selank and those pieces helped the lining stay sound [19]. Cell changes may also outlast whole Selank.
How long did Selank effects last in studies?
Whole Selank stays in blood about 3–5 minutes. Rat behavior changed for longer. The body may leave smaller pieces that still work. Changes in calming and mood chemicals may also continue.
In 2020, healthy adults had special brain scans after a nose dose. Fear-linked brain areas worked together differently at 5 minutes and 20 minutes [20]. That shows a brain change past the short blood time. It doesn't say when a person would stop feeling an effect.
A Russian trial used a 14-day course. Anxiety scores stayed lower during that period [5]. The trial didn't report how long one dose worked. Published human work doesn't answer that question.
How did Selank nose doses and shots differ?
Russian human studies gave Selank through the nose. Nerves at the top of the nose carry smell messages to the brain. Some medicine may move beside those nerves toward brain tissue. That route also avoids a first trip through the liver. The human trial used 2,700 micrograms per day for 14 days. The brain-scan study used a nose dose too [5][20].
Most rat work used a belly shot. Some animal work used a shot under the skin. Neither route tells us what is best for a person. Human studies haven't compared them fairly.
In 2016, two kinds of mice got 300 micrograms per kilogram for 5 days. Belly shots raised calming docking spots by 38% in the front of the brain. Nose doses raised a different kind of brain-cell spot instead [7]. Researchers couldn't tell whether either rise helped.
How much Selank reached the blood or brain?
A nose dose may move beside smell nerves toward the brain. It also avoids a first trip through the liver. No human study has published the share that reaches blood or brain.
Animal behavior changed, so some Selank reached its target. Healthy people also had changed brain scans [20]. The Russian trial found changed brain-wave tests and lower anxiety scores. Yet no human study gives the highest blood level. None says how long that peak took to appear.
How often was Selank given in studies?
Published studies often gave Selank daily for 5–14 day courses. The human anxiety trial lasted 14 straight days. It gave 2,700 micrograms per day [5]. The mouse route study lasted 5 straight days [7].
Rat stress studies gave Selank 15 minutes before each daily stress period [15][16]. Some tests ran for several weeks. Human facts end after 14 days. One short trial can't settle benefit or harm over months.
How soon did Selank change a study result?
A nose dose can reach smell nerves fast. In one study, 52 healthy people had brain scans. Two fear-linked areas worked together differently after 5 minutes. The change remained at the 20-minute mark [20].
Rat behavior also changed within the first hour. Maze and open-box tests measured fearful acts. They don't tell you when your feelings might change. The Russian trial reported only its combined 14-day result.