Evigrade

Kagocel

Other antivirals (local classification)

ATC code: J05AX-KAGOCEL

Updated · Methodology

Marketing claims without evidence base

The drug is promoted for these uses outside international guidelines. Each entry below is analyzed against AEMPS, FDA, EMA, Cochrane and major RCTs.

D

Common cold

Not recommended

Kagocel is marketed as an antiviral for colds and flu, with claims that it boosts the body's own interferon. It hasn't shown convincing benefit for these infections, and there's no solid evidence base for this use. A cold or flu usually clears on its own within a few days, and supportive care helps most: fluids, rest, and a fever reducer if needed. For severe flu or a high risk of complications, ask your doctor about antivirals with proven effectiveness.

ICD-10: J00 · ICD-11: CA00

D

Immune support and respiratory infection care

Not recommended

Kagocel is an antiviral marketed in Russia to prevent and treat colds and flu and to support immunity. Independent evidence has not shown convincing benefit for this use. For colds and flu, rest, fluids, and fever relief as needed help most, the annual flu shot gives real protection, and for severe flu a doctor may prescribe drugs with proven effect.

D

Influenza

Not recommended

Kagocel is an antiviral promoted for treating and preventing influenza and other respiratory infections. Studies have not shown convincing benefit against flu, and there is no solid evidence base for this use. The substance itself is harmless in this role. What actually helps with influenza is vaccination before the season and, in the first days of illness, antivirals with proven effect (such as oseltamivir) chosen by a doctor; otherwise rest, fluids and symptom relief.

ICD-10: J10-J11 · ICD-11: 1E32

F

Herpes simplex

Not recommended

Evidence tier F. Kagocel for herpes simplex infection is not mentioned in international guidelines (CDC STI 2021, IUSTI 2017, ). Evidence-based antiviral therapy for genital, orolabial and severe systemic herpes simplex consists of nucleoside analogues - aciclovir, valaciclovir and famciclovir - either episodically or as suppressive therapy in patients with frequent recurrences. Adding kagocel to nucleoside therapy has no demonstrated benefit and is not part of any international recommendation.

ICD-10: B00 · ICD-11: 1F00.Z

How to read tiers A–F
  • AStrong evidence – first or second line in international guidelines
  • BRecommended in selected cases
  • CStudy data contradict each other
  • DBenefit not proven, no documented harm
  • FDocumented harm, or risk without benefit

Mechanism of action

Kagocel is the trade name of a polymer obtained by chemical modification of gossypol (a polyphenolic compound from cotton seeds) with carboxymethylcellulose. The manufacturer (Nearmedic Plus, Russia) claims induction of late interferon synthesis (IFN-alpha and IFN-beta) in spleen, lymph nodes and intestinal mucosa, producing a generalised antiviral state. The active principle and its pharmacokinetics in humans are not characterised in indexed international literature. Kagocel is not registered by the , or any other major regulator and is not listed in antiviral or influenza materials. The molecule is registered only in Russia, Armenia, Belarus, Kazakhstan, Kyrgyzstan, Moldova, Tajikistan, Turkmenistan and Uzbekistan. Concerns about free gossypol residues, which have known antifertility effects in males, have been raised in Russian independent media and in international scientific commentary.

Safety

Contraindications

  • Age under 3 years
  • Pregnancy
  • Breastfeeding
  • Lactase deficiency, galactose intolerance, glucose-galactose malabsorption
  • Hypersensitivity

Serious adverse effects

  • Independent data on serious adverse events are unavailable
  • Theoretical risk of male antifertility effect (see practical note on gossypol)

Common adverse effects

  • Per manufacturer label — allergic reactions (frequency not specified in available sources)

Pregnancy: can you take Kagocel?

Contraindicated in pregnancy per manufacturer label.

Breastfeeding: can you take Kagocel?

Kagocel is a synthetic polymer based on gossypol and carboxymethyl cellulose developed in Russia in the 1990s. Systematic reviews do not confirm efficacy as an antiviral or interferon inducer. Gossypol concerns (potential antifertility effect, historical reports of suppressed spermatogenesis in men) make use controversial. Not registered in Spain; no data on transfer into human milk; use during breastfeeding is not supported.

Reference information, not a clinical decision. Discuss feeding pauses or changes with your physician or an IBCLC.

Practical notes

Russian practice note

Kagocel is produced exclusively in Russia under a single brand name and is not registered internationally. Clinical use is limited to the Russian Federation and CIS countries, included in Ministry of Health protocols, creating divergence from international practice and the absence of an independent evidence base.

Special situations

The active component is a synthetic polymer based on gossypol, a cottonseed derivative. Free gossypol is a known male antifertility agent that suppresses spermatogenesis and reduces sperm motility (Chinese studies from the 1970s; Coutinho EM. Contraception 2002). The manufacturer states that gossypol in Kagocel is covalently bound and not released in free form. Independent toxicological verification of this claim is not available in international literature. Given the absence of demonstrated clinical benefit and the unresolved question of free gossypol release, men of reproductive age planning conception are reasonable candidates to avoid the drug.

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Frequently asked

What is Kagocel used for?

Kagocel is evaluated for the following indications with varying evidence strength: Immune support and respiratory infection care (evidence tier D), Influenza (evidence tier D), Common cold (evidence tier D). See the full indication matrix with dosing and citations above on this page.

What are the side effects of Kagocel?

Common side effects of Kagocel (≥ 1 in 100): Per manufacturer label — allergic reactions (frequency not specified in available sources). See the Safety section for uncommon and serious reactions.

Is Kagocel safe during pregnancy?

Contraindicated in pregnancy per manufacturer label.

Is Kagocel compatible with breastfeeding?

Kagocel is a synthetic polymer based on gossypol and carboxymethyl cellulose developed in Russia in the 1990s. Systematic reviews do not confirm efficacy as an antiviral or interferon inducer. Gossypol concerns (potential antifertility effect, historical reports of suppressed spermatogenesis in men) make use controversial. Not registered in Spain; no data on transfer into human milk; use during breastfeeding is not supported.

Who should not take Kagocel?

Kagocel is contraindicated in: Age under 3 years; Pregnancy; Breastfeeding; Lactase deficiency, galactose intolerance, glucose-galactose malabsorption; Hypersensitivity. Full list in the Safety section.

Official sources

Direct links to regulator labels. Open in a new tab.

Other drugs in this group

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