N-Acetylcysteine pour Acute Bronchitis

Q: Does N-Acetylcysteine help with Acute Bronchitis?

Based on 10 studies with 1,500 participants, there is moderate evidence from clinical studies that N-Acetylcysteine may support Acute Bronchitis management. Our evidence grade is B (Good Evidence).

Q: How much N-Acetylcysteine should I take for Acute Bronchitis?

Studies have used various dosages. A commonly studied range is 600-1,200 mg/day. Always consult your healthcare provider before starting any supplement regimen.

Q: Are there side effects of N-Acetylcysteine?

Reported side effects may include Gastrointestinal discomfort (nausea, diarrhea), Unpleasant sulfur taste/smell, Headache, Rare: bronchospasm (in asthma patients, inhaled form). Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

Q: How strong is the evidence for N-Acetylcysteine and Acute Bronchitis?

We rate the evidence as Grade B (Good Evidence). This rating is based on 10 peer-reviewed studies with 1,500 total participants. The overall direction of effect is positive.

B Preuves Au moins un essai randomisé le soutient, avec des résultats globalement concordants.

Meta-analyses associate NAC supplementation with lower inflammatory markers and improved oxygenation in respiratory patients. Its well-established mucolytic properties support airway clearance in acute bronchitis. NAC is an FDA-approved mucolytic agent with a long safety record.

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En conclusion

Key Study Findings

Review

N-acetylcysteine in paediatrics: a review of efficacy, safety and dosing strategies in respiratory care.

Dose: 20 mg/kg/day acute; 200 mg TID chronic vs: None Outcome: Efficacy in pediatric respiratory diseases Effet: None None

Population: Children with acute/chronic respiratory diseases

Other n=270 8 weeks

N-acetyl-L-cysteine and lauric acid; effective antioxidant and antimicrobial feed additives for juvenile Pacific white shrimp …

Dose: 0.2% supplementation vs: Control diet at LSD and HSD Outcome: Growth, immune and antioxidant response in shrimp Effet: None None

Population: Pacific white shrimp (L. vannamei) at high stocking density

In Vitro

Improving in vitro induction efficiency of human primordial germ cell-like cells using N2B27 or NAC-based …

Dose: None vs: GK15 induction without NAC Outcome: hPGCLC induction efficiency Effet: None None

Population: Human iPSCs (in vitro)

Review

Cautious Hope for Cannabidiol (CBD) in Rheumatology Care.

Dose: Cannabidiol (CBD) vs: None Outcome: Pain and inflammation in rheumatic diseases Effet: None None

Population: Patients with rheumatic diseases

Randomized Controlled Trial n=333 1.0 weeks Double-blind

Intravenous N-acetylcysteine in respiratory disease with abnormal mucus secretion.

Dose: 600 mg vs: placebo and ambroxol Outcome: Sputum viscosity and expectoration difficulty Effet: None p<0.001

Population: Patients with respiratory disease and abnormal mucus

animal study (controlled experiment) n=120 3 weeks

Effects of N-acetyl-l-cysteine on chronic heat stress-induced oxidative stress and inflammation in the ovaries of …

Dose: 1 g/kg NAC in basal diet vs: Placebo Effet: None None

Key Statistics

Études

1500

Participants

↑

Positive

Note

Referenced Papers

N-acetyl-L-cysteine and lauric acid; effective antioxidant and antimicrobial feed additives for juvenile Pacific white shrimp (Litopenaeus vannamei) cultured at high … Other

PloS one 2025 5 citations

N-acetylcysteine in paediatrics: a review of efficacy, safety and dosing strategies in respiratory care. Review

Drugs in context 2025 1 citations

Improving in vitro induction efficiency of human primordial germ cell-like cells using N2B27 or NAC-based medium. Other

Journal of biomedical … 2025

Cautious Hope for Cannabidiol (CBD) in Rheumatology Care. Review

Arthritis care & … 2023 36 citations

Effects of N-acetyl-l-cysteine on chronic heat stress-induced oxidative stress and inflammation in the ovaries of growing pullets. Other

Poultry science 2023 13 citations

Intravenous N-acetylcysteine in respiratory disease with abnormal mucus secretion. RCT

European review for … 2023 2 citations

Correlates of high phosphatidylethanol (PEth) levels and their concordance with self-reported heavy alcohol consumption among men who have sex with … RCT

Alcoholism, clinical and … 2022 4 citations

Effects of N-acetyl-l-cysteine on heat stress-induced oxidative stress and inflammation in the hypothalamus of hens. RCT

Journal of thermal … 2021 24 citations

N-acetyl-l-cysteine attenuates oxidative damage and neurodegeneration in rat brain during aging. Other

Canadian journal of … 2018 37 citations

Simultaneous quantification of Echinacea species, Flos Lonicerae, Radix Scutellaria and Fructus Forsythiae combinations by rapid resolution liquid chromatography. Other

Natural product communications 2011 7 citations

Pelargonium sidoides for acute bronchitis: a systematic review and meta-analysis. Meta-Analysis

Phytomedicine : international … 2008 100 citations

Oxidative stress in aldosteronism. Review

Cardiovascular research 2006 42 citations

Respiratory and allergic diseases: from upper respiratory tract infections to asthma. Review

Primary care 2002 56 citations

[Mucolytics in acute and chronic respiratory tract disorders. II. Uses for treatment and antioxidant properties]. Review

Polski merkuriusz lekarski … 2002 16 citations

The pattern of micro-organisms and the efficacy of new macrolide in acute lower respiratory tract infections. RCT

Respirology (Carlton, Vic.) 1998 14 citations

[Therapy of respiratory tract diseases with N-acetylcysteine. An open therapeutic observation study of 2,512 patients]. Other

Fortschritte der Medizin 1992

[Therapy of bronchitis. Successful single-dosage treatment with N-acetylcysteine, results of an administration surveillance study in 3,076 patients]. Other

Fortschritte der Medizin 1991

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

Posologies couramment utilisées

general:: 600-1,200 mg/day
respiratorysupport:: 600 mg 2-3x/day

Limite supérieure : No established UL; doses up to 1,800 mg/day widely studied

Posologies étudiées dans la recherche

Posologie	Durée	Effet	N
20 mg/kg/day acute; 200 mg TID chronic	--	Positive	--
0.2% supplementation	8 weeks	Positive	270
None	--	Positive	--
Cannabidiol (CBD)	--	Mixed	--
600 mg	1.0 weeks	Mixed	333
1 g/kg NAC in basal diet	3 weeks	Positive	120
None	--	Mixed	--
1000 mg/kg in basal diet	3 weeks	Positive	120

Moment optimal de prise : Between meals on empty stomach for optimal absorption

Safety & Side Effects

Effets indésirables signalés

⚠ Gastrointestinal discomfort (nausea, diarrhea)
⚠ Unpleasant sulfur taste/smell
⚠ Headache
⚠ Rare: bronchospasm (in asthma patients, inhaled form)

Interactions connues

● Nitroglycerin (may enhance vasodilatory and headache effects)
● Activated charcoal (reduces NAC absorption)
● Anticoagulants (theoretical effect on platelet function)

Apport maximal tolérable : No established UL; doses up to 1,800 mg/day widely studied

Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.

Frequently Asked Questions

Does N-Acetylcysteine help with Acute Bronchitis?

Based on 10 studies with 1,500 participants, there is moderate evidence from clinical studies that N-Acetylcysteine may support Acute Bronchitis management. Our evidence grade is B (Good Evidence).

How much N-Acetylcysteine should I take for Acute Bronchitis?

Studies have used various dosages. A commonly studied range is 600-1,200 mg/day. Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of N-Acetylcysteine?

Reported side effects may include Gastrointestinal discomfort (nausea, diarrhea), Unpleasant sulfur taste/smell, Headache, Rare: bronchospasm (in asthma patients, inhaled form). Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

How strong is the evidence for N-Acetylcysteine and Acute Bronchitis?

We rate the evidence as Grade B (Good Evidence). This rating is based on 10 peer-reviewed studies with 1,500 total participants. The overall direction of effect is positive.

Autres ingrédients pour Acute Bronchitis

Pelargonium sidoides A

N-Acetylcysteine pour d'autres pathologies

Post-Viral Fatigue C

Verdict rapide

Evidence Strength72%

High confidence

Synthèse des études

RCT (4)Meta (1)Other (5)

Comparer les alternatives

Découvrez comment d'autres ingrédients se comparent pour cette condition.Découvrez comment d'autres ingrédients se comparent pour cette pathologie.

Voir tous les ingrédients pour Acute Bronchitis

En savoir plus

References

[1] Shafaq Fatima. PLoS One. 2025. N-acetyl-L-cysteine and lauric acid; effective antioxidant and antimicrobial feed additives for juvenile Pacific white shrimp (Litopenaeus vannamei) cultured at high … doi:10.1371/journal.pone.0315819 PubMed
[2] Francesca Benedetti et al.. Drugs Context. 2025. N-acetylcysteine in paediatrics: a review of efficacy, safety and dosing strategies in respiratory care. doi:10.7573/dic.2025-7-7 PubMed
[3] Gege Yuan et al.. J Biomed Res. 2025. Improving in vitro induction efficiency of human primordial germ cell-like cells using N2B27 or NAC-based medium. doi:10.7555/JBR.38.20240433 PubMed
[4] Mary-Ann Fitzcharles et al.. Arthritis Care Res (Hoboken). 2023. Cautious Hope for Cannabidiol (CBD) in Rheumatology Care. doi:10.1002/acr.24176 PubMed
[5] Xianhong Cao et al.. Poult Sci. 2023. Effects of N-acetyl-l-cysteine on chronic heat stress-induced oxidative stress and inflammation in the ovaries of growing pullets. doi:10.1016/j.psj.2022.102274 PubMed
[6] W Tang et al.. Eur Rev Med Pharmacol Sci. 2023. Intravenous N-acetylcysteine in respiratory disease with abnormal mucus secretion. doi:10.26355/eurrev_202306_32628 PubMed
[7] Matthew F McLaughlin et al.. Alcohol Clin Exp Res. 2022. Correlates of high phosphatidylethanol (PEth) levels and their concordance with self-reported heavy alcohol consumption among men who have sex with … doi:10.1111/acer.14891 PubMed
[8] Yulan Zhao et al.. J Therm Biol. 2021. Effects of N-acetyl-l-cysteine on heat stress-induced oxidative stress and inflammation in the hypothalamus of hens. doi:10.1016/j.jtherbio.2021.102927 PubMed
[9] Geetika Garg et al.. Can J Physiol Pharmacol. 2018. N-acetyl-l-cysteine attenuates oxidative damage and neurodegeneration in rat brain during aging. doi:10.1139/cjpp-2018-0209 PubMed
[10] Jie Ma et al.. Nat Prod Commun. 2011. Simultaneous quantification of Echinacea species, Flos Lonicerae, Radix Scutellaria and Fructus Forsythiae combinations by rapid resolution liquid chromatography. PubMed
[11] Taofikat B Agbabiaka et al.. Phytomedicine. 2008. Pelargonium sidoides for acute bronchitis: a systematic review and meta-analysis. doi:10.1016/j.phymed.2007.11.023 PubMed
[12] Yao Sun et al.. Cardiovasc Res. 2006. Oxidative stress in aldosteronism. doi:10.1016/j.cardiores.2006.03.007 PubMed
[13] Raja Jaber. Prim Care. 2002. Respiratory and allergic diseases: from upper respiratory tract infections to asthma. doi:10.1016/s0095-4543(01)00008-2 PubMed
[14] Maciej Kupczyk et al.. Pol Merkur Lekarski. 2002. [Mucolytics in acute and chronic respiratory tract disorders. II. Uses for treatment and antioxidant properties]. PubMed
[15] P Soepandi et al.. Respirology. 1998. The pattern of micro-organisms and the efficacy of new macrolide in acute lower respiratory tract infections. doi:10.1111/j.1440-1843.1998.tb00108.x PubMed
[16] K P Völkl et al.. Fortschr Med. 1992. [Therapy of respiratory tract diseases with N-acetylcysteine. An open therapeutic observation study of 2,512 patients]. PubMed
[17] H H Gerards et al.. Fortschr Med. 1991. [Therapy of bronchitis. Successful single-dosage treatment with N-acetylcysteine, results of an administration surveillance study in 3,076 patients]. PubMed

Avertissement FDA: Ces déclarations n'ont pas été évaluées par la Food and Drug Administration. Les produits et informations sur ce site ne sont pas destinés à diagnostiquer, traiter, guérir ou prévenir quelque maladie que ce soit. Les notes de preuve présentées sont basées sur notre analyse de la recherche publiée et évaluée par des pairs et ne constituent pas un avis médical. Consultez toujours votre professionnel de santé avant de commencer tout régime de compléments alimentaires.