{"id":51228,"date":"2026-06-23T08:26:37","date_gmt":"2026-06-23T06:26:37","guid":{"rendered":"https:\/\/semaxpolska.com\/?p=51228"},"modified":"2026-06-22T09:23:57","modified_gmt":"2026-06-22T07:23:57","slug":"selank-vs-afobazole-two-russian-anti-anxiety-medications-with-different-mechanisms-of-action","status":"publish","type":"post","link":"https:\/\/bioevidencehub.com\/en_gb\/selank-vs-afobazole-dwa-rosyjskie-srodki-przeciwlekowe-o-odmiennym-dzialaniu\/","title":{"rendered":"Selank vs Afobazole \u2013 Two Russian Anti-Anxiety Agents with Different Actions"},"content":{"rendered":"

Selank and Afobazole are two Russian preparations developed to reduce anxiety and improve stress resistance. Although both exhibit anxiolytic effects without causing significant drowsiness, they differ in their structure, method of administration, mechanism of action, and the speed at which their effects manifest.<\/p>\n

What are Selank and Afobazole?<\/h3>\n

Selank is a synthetic heptapeptide made up of seven amino acids. It was designed as an analogue of the natural peptide tuftsin, which is involved in communication between the immune and nervous systems. Selank is administered intranasally, and studies suggest it may reach the central nervous system very rapidly. It was developed in Russia and Ukraine in the 1990s and is approved there for the treatment of anxiety disorders and stress-related conditions.<\/p>\n

Afobazole (fabomotizole), on the other hand, is a synthetic chemical compound available in tablet form. It was also developed in Russia in the late 1990s. It works primarily by activating sigma-1 receptors, which are involved in regulating cellular responses to stress. Like Selank, it was designed not to cause significant sedation.<\/p>\n

How Do They Get into the Body?<\/h2>\n
\n
\n
\n\n\n\n\n\n\n\n\n
Feature<\/th>\nSelank<\/th>\nAfobazole<\/th>\n<\/tr>\n<\/thead>\n
Method of administration<\/strong><\/td>\nNasal spray \u2013 a few doses into each nostril<\/td>\nTablet taken orally, usually 3 times a day<\/td>\n<\/tr>\n
How quickly does it reach the brain<\/strong><\/td>\nVery quickly \u2013 through the nasal cavity directly to the brain, bypassing the digestion process<\/td>\nIt is absorbed via the gastrointestinal tract; maximum blood concentration is reached after approximately 1 hour.<\/td>\n<\/tr>\n
How long does it work<\/strong><\/td>\nThe main peptide breaks down in about 2 minutes, but active fragments can last for 3\u20134 hours<\/td>\nThe main compound is eliminated relatively quickly (around 50 minutes), whereas its metabolite remains active for up to 6 hours.<\/td>\n<\/tr>\n
How is it removed from the body<\/strong><\/td>\nBroken down into harmless protein fragments and excreted by the kidneys within 24 hours<\/td>\nApproximately 85% is excreted by the kidneys and 15% via the gastrointestinal tract; it is completely eliminated within one day<\/td>\n<\/tr>\n
How many substances become biologically available<\/strong><\/td>\nHigh brain availability via intranasal administration and bypassing hepatic metabolism<\/td>\nApproximately 43\u201355% of the administered dose enters the bloodstream after passing through the liver<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n<\/div>\n
\n

How Do They Reduce Anxiety?<\/h2>\n

Both preparations reduce anxiety symptoms without acting like typical sedatives or sleeping pills. Neither was designed to cause drowsiness.<\/p>\n

\n
\n
\n\n\n\n\n\n\n\n\n\n
Feature<\/th>\nSelank<\/th>\nAfobazole<\/th>\n<\/tr>\n<\/thead>\n
Primary anxiolytic action<\/strong><\/td>\nSupports the action of GABA \u2013 the main inhibitory neurotransmitter \u2013 without excessively suppressing brain activity<\/td>\nIt activates sigma-1 receptors, which help cells cope with stress signals; it also affects melatonin receptors<\/td>\n<\/tr>\n
Impact on brain health<\/strong><\/td>\nIncreases BDNF and NGF levels, supporting communication between neurons, memory, and concentration<\/td>\nIt may increase BDNF levels by activating sigma-1 receptors, thereby supporting the regeneration of nerve cells<\/td>\n<\/tr>\n
Effect on mood<\/strong><\/td>\nGently affects serotonin and dopamine pathways, exhibiting mild mood-lifting effects<\/td>\nThe benefits mainly concern the regulation of stress and anxiety, rather than a direct improvement in mood.<\/td>\n<\/tr>\n
Impact on the immune system<\/strong><\/td>\nIt exhibits immunomodulatory properties and can influence the regulation of inflammatory processes.<\/td>\nThe anti-inflammatory effect appears to be significantly weaker<\/td>\n<\/tr>\n
Risk of sedation<\/strong><\/td>\nNo significant drowsiness was observed<\/td>\nNo significant drowsiness was observed<\/td>\n<\/tr>\n
Risk of addiction<\/strong><\/td>\nNo evidence of tolerance, dependence or withdrawal symptoms<\/td>\nIn studies lasting up to 12 weeks, no addiction or withdrawal symptoms were reported.<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n<\/div>\n
\n

How Do They Work Effectively?<\/h2>\n
\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n
Feature<\/th>\nSelank<\/th>\nAfobazole<\/th>\n<\/tr>\n<\/thead>\n
Start of operation<\/strong><\/td>\nFast \u2013 the first effects can appear within 20-60 minutes<\/td>\nGradual \u2013 the full anxiolytic effect usually develops after 2\u20134 weeks of regular use<\/td>\n<\/tr>\n
Typical dosage used in studies<\/strong><\/td>\n400\u2013600 micrograms intranasally, 1\u20133 times daily<\/td>\n10 mg three times a day (30 mg total daily)<\/td>\n<\/tr>\n
Main research areas<\/strong><\/td>\nGeneralized anxiety, short-term stress, stress-related memory and concentration problems<\/td>\nGeneralized anxiety disorder, adjustment disorders, and support during nicotine withdrawal<\/td>\n<\/tr>\n
Clinical trials<\/strong><\/td>\nAround 15 clinical trials in Russia and Ukraine; results more favourable than placebo and comparable to older anxiolytic drugs<\/td>\nOver 20 clinical trials in Russia, some with up to 500 patients, have demonstrated benefits compared to placebo.<\/td>\n<\/tr>\n
Impact on memory and concentration<\/strong><\/td>\nWell-documented benefits for working memory, attention, and mental agility, particularly in stressful situations<\/td>\nCognitive benefits seem secondary and are not the main goal of the research.<\/td>\n<\/tr>\n
Side effects<\/strong><\/td>\nMild and infrequent: slight nasal irritation, transient fatigue, occasional headache<\/td>\nMild and rare: nausea, mild stomach upset, and occasional allergic reactions<\/td>\n<\/tr>\n
Interactions with other substances<\/strong><\/td>\nNo significant interactions with liver enzymes are known.<\/td>\nMetabolised by the CYP3A4 enzyme, therefore it may interact with certain medications<\/td>\n<\/tr>\n
The biggest limitation<\/strong><\/td>\nMost research has been conducted solely in Russia and Ukraine; limited long-term data<\/td>\nSimilar geographical limitations and a lack of large clinical trials in the USA, UK, and EU<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n<\/div>\n

How do they work for anxiety?<\/h2>\n

Both preparations reduce anxiety symptoms, but they use different biological mechanisms.<\/p>\n

Selank<\/h3>\n

Research indicates that Selank:<\/p>\n

    \n
  • modulates GABAergic signalling,<\/li>\n
  • affects neurotrophic factors, such as BDNF and NGF,<\/li>\n
  • can affect the serotonergic and dopaminergic systems,<\/li>\n
  • It demonstrates neuroregulatory and immunomodulatory properties.<\/li>\n<\/ul>\n

    Afobazole<\/h3>\n

    Research suggests that Afobazole:<\/p>\n

      \n
    • activates sigma-1 receptors,<\/li>\n
    • supports cell adaptation to stress,<\/li>\n
    • can affect melatonin receptors,<\/li>\n
    • It mainly focuses on regulating chronic stress and anxiety.<\/li>\n<\/ul>\n

      Neither of the preparations was designed as a classic sedative, and both appear to be characterised by a low risk of sedation and dependence.<\/p>\n

      Which one works faster?<\/h2>\n

      One of the biggest differences between these substances is the time it takes for the effects to appear.<\/p>\n

      Selank<\/strong> It is mainly studied in the context of faster reduction of tension and stress, as well as support for cognitive functions.<\/p>\n

      Afobazole<\/strong> usually requires regular use for several weeks and is more often discussed in the context of chronic, persistent anxiety.<\/p>\n

      Impact on Cognitive Functions<\/h2>\n

      Research into Selank indicates potential benefits regarding:<\/p>\n

        \n
      • RAM,<\/li>\n
      • concentration,<\/li>\n
      • resilience to stress,<\/li>\n
      • cognitive functions in situations of psychological stress.<\/li>\n<\/ul>\n

        Afobazole may also show some cognitive benefits, however, these are not the main area of its research.<\/p>\n

        Security Profile<\/h2>\n

        Available studies suggest that both preparations are generally well tolerated.<\/p>\n

        Selank<\/strong><\/p>\n

          \n
        • sporadic nasal irritation,<\/li>\n
        • occasional headache,<\/li>\n
        • fleeting fatigue.<\/li>\n<\/ul>\n

          Afobazole:<\/strong><\/p>\n

            \n
          • Mild stomach upset,<\/li>\n
          • nausea,<\/li>\n
          • rare allergic reactions.<\/li>\n<\/ul>\n

            No significant risk of addiction or withdrawal symptoms was found for any of these preparations in published studies.<\/p>\n

            Disclaimer<\/h2>\n

            The content is for educational and informational purposes only and should not be interpreted as medical advice, diagnosis, or therapeutic recommendation. Selank and Afobazole have not been approved by the US Food and Drug Administration (FDA) or the European Medicines Agency (EMA) for the treatment of anxiety disorders or other medical conditions. Most of the available data comes from studies conducted in Russia and Eastern Europe. Further, well-designed clinical trials are needed to better determine their efficacy, safety, and long-term effects.<\/p>","protected":false},"excerpt":{"rendered":"

            Selank and Afobazole are two Russian preparations developed with the aim of reducing anxiety and improving stress resistance. Despite both exhibiting an anxiolytic effect without inducing\u2026<\/p>","protected":false},"author":7908,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[192],"tags":[],"class_list":["post-51228","post","type-post","status-publish","format-standard","hentry","category-kategoria-selank","beh-no-thumb"],"_links":{"self":[{"href":"https:\/\/bioevidencehub.com\/en_gb\/wp-json\/wp\/v2\/posts\/51228","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bioevidencehub.com\/en_gb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bioevidencehub.com\/en_gb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bioevidencehub.com\/en_gb\/wp-json\/wp\/v2\/users\/7908"}],"replies":[{"embeddable":true,"href":"https:\/\/bioevidencehub.com\/en_gb\/wp-json\/wp\/v2\/comments?post=51228"}],"version-history":[{"count":0,"href":"https:\/\/bioevidencehub.com\/en_gb\/wp-json\/wp\/v2\/posts\/51228\/revisions"}],"wp:attachment":[{"href":"https:\/\/bioevidencehub.com\/en_gb\/wp-json\/wp\/v2\/media?parent=51228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bioevidencehub.com\/en_gb\/wp-json\/wp\/v2\/categories?post=51228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bioevidencehub.com\/en_gb\/wp-json\/wp\/v2\/tags?post=51228"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}