Bromhexine – Effects, Dosage and Side Effects
Bromhexine is a mucolytic agent used to treat respiratory conditions involving thick mucus. It thins bronchial secretions and makes coughing up mucus easier.
Things worth knowing about "Bromhexine"
Bromhexine is a mucolytic agent used to treat respiratory conditions involving thick mucus. It thins bronchial secretions and makes coughing up mucus easier.
What is Bromhexine?
Bromhexine is a synthetic mucolytic drug used to loosen and thin thick mucus in the airways, making it easier to cough up. It belongs to the class of expectorants and mucolytics and is available in various forms, including tablets, syrups, drops, and inhalation solutions. It is used in both adults and children.
Indications
Bromhexine is indicated for use in:
- Acute and chronic bronchitis
- Chronic obstructive pulmonary disease (COPD)
- Bronchial asthma with excessive mucus production
- Bronchiectasis (abnormal widening of the bronchial tubes)
- Cystic fibrosis as a supportive treatment
- Other respiratory conditions where mucus clearance is impaired
Mechanism of Action
Bromhexine works through several pathways:
- It depolymerizes mucopolysaccharides in bronchial secretions, breaking down the long sugar-chain molecules that make mucus thick and sticky, thereby reducing its viscosity.
- It stimulates the serous cells of the bronchial mucosa to produce thinner, more watery secretions, further diluting the mucus.
- It enhances the activity of the cilia (tiny hair-like structures) lining the airways that sweep mucus toward the throat for removal.
- Bromhexine is a prodrug and is metabolized in the body to its active form, ambroxol, which also exerts mucolytic effects.
Dosage
Dosage depends on age, body weight, and formulation. General guidelines are:
- Adults and adolescents 14 years and older: typically 8–16 mg, three times daily
- Children aged 6 to 14 years: typically 8 mg, three times daily
- Children under 6 years: only under medical supervision, usually 4 mg, three times daily
Always follow the instructions provided in the package leaflet or as directed by a healthcare professional.
Side Effects
Bromhexine is generally well tolerated. Possible side effects include:
- Common: Gastrointestinal complaints such as nausea, vomiting, stomach pain, or diarrhea
- Uncommon: Headache, dizziness, mild fever
- Rare: Allergic reactions such as skin rash, itching, or facial swelling
- Very rare: Severe skin reactions (Stevens-Johnson syndrome, toxic epidermal necrolysis) – seek immediate medical attention if these occur
Contraindications and Warnings
Bromhexine should not be used in cases of:
- Known hypersensitivity to the active substance
- Severe liver disease (consult a physician before use)
- Gastric ulcers – use with caution
During pregnancy, especially in the first trimester, and during breastfeeding, bromhexine should only be taken on explicit medical advice.
Drug Interactions
Bromhexine has been shown to enhance the distribution of certain antibiotics (e.g., amoxicillin, doxycycline, erythromycin) into lung tissue, a property that may be used beneficially in clinical practice. Other clinically significant interactions have not been sufficiently documented.
References
- European Medicines Agency (EMA): Assessment report on Bromhexine. EMA/HMPC, 2012.
- Mutschler E. et al. – Drug Actions: Basic Principles and Therapeutic Aspects. Wissenschaftliche Verlagsgesellschaft Stuttgart, 2019.
- World Health Organization (WHO): Model Formulary – Mucolytics and Expectorants. WHO Press, Geneva.
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