Cohexine

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Cohexine

Quick Facts

Property Description
Active ingredient Bromhexine (typically as the monohydrochloride salt)
Form Oral tablets, syrups, injectable solutions
Pharmacological class Mucolytic and Secretolytic Agent
General purpose Clearing thick respiratory secretions
Origin Synthetic derivative of the Adhatoda vasica plant

What Type of Medicine is Cohexine?

Cohexine is a single-ingredient medicinal preparation whose active component is Bromhexine, a compound recognized for its targeted effect on bronchial mucus. It is classified as a Mucolytic and Secretolytic Agent. This classification means its function is to actively modify the properties of respiratory secretions, which distinguishes it from medications designed to suppress the cough reflex. Cohexine serves the general purpose of restoring efficient mucus transport in the airways.

Composition, Forms, and Origin

The core composition utilizes the synthetic compound Bromhexine, which is chemically derived from the quinazoline alkaloid vasicine, found in the Adhatoda vasica plant, defining it as a synthetic Benzylamine derivative. Cohexine is a versatile preparation available for oral administration in several dosage forms, including oral tablets and syrups (oral solutions or suspensions), ensuring suitability for both adults and children. Bromhexine is used to make bronchial secretions easier to expectorate.

General Purpose and Primary Action

The medication's primary physiological action is achieved through a Secretolytic effect, which involves reducing the viscosity (thickness) of the mucus by actively breaking down the mucopolysaccharide fibers. This makes the phlegm thinner and less sticky, promoting a secretomotoric effect that allows the respiratory system's cilia to transport the secretions out of the lungs more easily. The overall benefit is the relief of congestion resulting from thick, retained secretions, providing support in typical use scenarios involving productive coughs.

What side effects are possible with Cohexine?

Possible Side Effects and Safety Information

Cohexine (Bromhexine) is a secretolytic agent whose official safety profile is structured by regulatory bodies based on documented adverse reactions and specific constraints. These reactions are categorized by frequency and the physiological systems affected, as outlined in official prescribing information.

Frequency-Classified Adverse Reactions

Adverse reactions are classified by their documented occurrence rates:

  • Uncommon (ge 1/1,000 to < 1/100): Includes effects such as nausea, vomiting, diarrhoea, and upper abdominal pain, which are related to the gastrointestinal system.
  • Rare (ge 1/10,000 to < 1/1,000): This frequency tier includes reactions affecting the skin, such as rashes and urticaria.
  • Not Known: The frequency of severe systemic reactions, including anaphylactic shock, angioedema, and Severe Cutaneous Adverse Reactions (SCARs), is reported from post-marketing surveillance and is often formally classified as not known.

Serious Safety Considerations

The most serious safety concerns officially documented include Severe Cutaneous Adverse Reactions (SCARs), such as Stevens-Johnson syndrome and Toxic Epidermal Necrolysis, which are explicitly listed in regulatory labeling. Additionally, severe hypersensitivity reactions, including anaphylactic shock, are noted in the safety profile. Regulatory documents also note the potential for bronchospasm, particularly in susceptible individuals, and the necessity to avoid the medicine in patients with known hypersensitivity.

Population-Specific Safety Notes

The label specifies that caution is required in patients with severe hepatic or renal impairment due to the potential for reduced clearance of the compound or its metabolites. Use is not recommended during the first trimester of pregnancy and is generally advised against during the entire course of pregnancy and lactation, as Bromhexine is known to be excreted in human milk. Caution is also necessary in individuals with a history of peptic ulcers and those unable to effectively clear their secretions, where a risk of mucus accumulation may exist.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose Scope Details based on Official Regulatory Documentation
Documented overdose presentations Regulatory documents report no specific overdose syndrome in man; observed clinical signs are generally consistent with the known side effects of the medicine. Symptoms may include nausea, vomiting, headache, dizziness, stomach pain, and drowsiness. An undesirable increase in the volume of bronchial secretions has also been cited [HPRA SmPC, NAFDAC PI].
Physiological systems affected Adverse effects observed in overdose situations primarily affect the gastrointestinal and central nervous systems, with a potential for the severe event of seizure (convulsion) documented in regulatory text [NAFDAC PI].
Emergency-response statements Treatment is uniformly defined as symptomatic and supportive care. Specific procedures listed for excessive ingestion may include gastric lavage or administration of activated charcoal [HPRA SmPC, NAFDAC PI].
When immediate medical help is required Regulatory authorities mandate to seek immediate medical attention or contact emergency services. Individuals must immediately telephone the Poisons Information Centre or Poison Control Services upon a suspected overdose [Australian TGA PI, NAFDAC PI].

Overdose Classifications (High-Level)

Classification Details based on Official Regulatory Documentation
Severity classification The profile allows for the potential of the serious event of seizure (convulsion) following excessive ingestion [NAFDAC PI].
Overdose-context constraints No specific antidote for Bromhexine overdose is documented; management is strictly procedural and symptomatic.

Official Overdose Statements

The official overdose profile is characterized by an absence of a unique toxicological pattern, with manifestations being an exaggeration of known effects. Regulatory documents mandate an urgent, immediate call to emergency services or a Poison Control Centre when overdose is suspected. Management procedures are explicitly documented as symptomatic and supportive, reflecting the regulatory statement that no specific reversal agent is known. The possibility of seizure is noted as a severe potential outcome.

Therapeutic Uses of Cohexine

Cohexine may be part of the symptomatic management strategy for conditions associated with abnormally thick phlegm. Its use aligns with supportive management in clinical settings that involve acute or chronic respiratory conditions marked by thick phlegm. The medication is relevant for managing symptoms that interfere with daily comfort, such as persistent chest congestion and difficulty in expectoration.

“It is primarily applied in contexts where additional symptomatic support is needed to address the core problem of overly thick, tenacious phlegm in the airways.”

The medication helps address symptom clusters in conditions like acute bronchitis, exacerbations of Chronic Obstructive Pulmonary Disease (COPD), and during phases of respiratory tract infections. It is applied in clinical settings that involve acute or unstable symptom patterns, and it contributes to easing the overall symptom load. Cohexine is commonly used across conditions presenting with acute episodes or those characterized by periods of heightened symptoms.

Quick Fact: Relief for Symptoms Related to Physical Discomfort
The medication is primarily intended to provide supportive relief for symptoms related to physical discomfort, offering symptomatic assistance that helps patients cope more steadily with symptom fluctuations.

Regulatory References

  1. NCATS OpenData Portal, Therapeutic Glossary

Eligibility and Restrictions for Use

Who Can and Cannot Use Cohexine? (Bromhexine)

The population eligibility for Cohexine is defined by official regulatory documents, specifying who is permitted to use the medicine and who is prohibited.

Contraindicated Populations (Must Not Use)

Use of Cohexine is strictly contraindicated for individuals with known hypersensitivity to bromhexine hydrochloride or any of its excipients. It is also contraindicated in patients with a current or history of gastroduodenal ulceration, or those with rare hereditary fructose intolerance if the formulation contains excipients like Sorbitol or Maltitol.

Eligibility by Age and Condition

Population Group Regulatory Status
Adults and Adolescents (ge 12 years) Established use.
Children under 2 years Not recommended; use must be under medical supervision.
Severe Hepatic or Renal Impairment Use with caution; close monitoring is required due to risk of metabolite accumulation.
Pregnancy and Lactation Not recommended as a precautionary measure (especially first trimester) due to limited human data and excretion into breast milk.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Cohexine’s official interaction profile focuses primarily on its effects on co-administered medicinal products and on the alteration of its own clearance under specific conditions, as documented by regulatory authorities.

Interactions with Medicinal Products

Cohexine has been documented to modify the tissue concentration of specific antibiotic agents. Co-administration with antibiotics such as Amoxycillin, Erythromycin, and Oxytetracycline leads to increased concentrations of these antibiotics within bronchopulmonary secretions and pulmonary tissue.

A key pharmacodynamic restriction relates to the combination of Cohexine with antitussive medicines. Regulatory information states that combining the medication with cough suppressants can impede or hamper the intended expulsion of the already-diluted sputum.

Metabolism and Clearance Notes

Official labeling notes that the potential for relevant interactions with common metabolic pathways, such as CYP 450 2C9 or 3A4 substrates, is considered unlikely. However, Cohexine’s own clearance may be affected by patient status, as the clearance of the drug or its metabolites may be reduced in individuals with severe hepatic or renal impairment.

Interactions with Food

The plasma concentration of Cohexine itself is altered by consumption with meals. Concomitant food intake is documented to increase Cohexine plasma levels, a finding attributed to a change in the drug’s first-pass effect.

Mechanism of Action

Cationic Binding and Membrane Disruption

Cohexine's mechanism initiates via a physical-chemical pathway where its positively charged molecule is electrostatically drawn to the negatively charged components on microbial cell surfaces, including the bacterial and fungal cytoplasmic membrane. This binding immediately destabilizes the membrane, initiating a cascade that results in the leakage of essential low-molecular-weight cellular contents and a reduction in the viable microbial population.

Intracellular Coagulation and Metabolic Shutdown

Following membrane compromise, Cohexine penetrates the cell and facilitates intracellular protein precipitation and the inhibition of membrane-bound enzyme systems. This systemic molecular coagulation halts vital energy production pathways, a step that facilitates irreversible cellular changes. This mechanism establishes the elimination of the viable microorganism, defining the drug's bactericidal effect.

Tissue Substantivity for Prolonged Action

A distinct property is the drug's substantivity, its strong affinity to bind to negatively charged proteins on application sites. This creates a local reservoir from which the drug is slowly released. This prolonged release mechanism sustains an antimicrobial presence on the surface, contributing to the persistence of an antimicrobial state, which delays microbial population recovery.

Dosage and Administration Information

How Cohexine is Used: Administration Guidelines

Cohexine (Bromhexine) is a secretolytic agent with specific guidelines governing the methods, amounts, and duration of its administration. These instructions focus on the logistical procedures for taking the medicine.


Routes and Dosage

Administration Detail Instructions
Routes Primarily Oral (tablets, syrups). Also available for Intravenous (IV), Intramuscular (IM) injection, and Inhalation (where a specific solution is provided).
Standard Adult Oral Dose 8 mg taken three times daily. The dose may be increased to 16 mg three times daily for the first 7 days.
Dosing Frequency Typically three times daily (every 8 hours) to maintain consistent presence in the system.
Pediatric Rules Dosing is age-adjusted (e.g., 4 mg two or three times daily for younger children). Use in children under 2 years is often not recommended.

Key Administration Constraints

  • Duration: Cohexine is intended for short-term use for symptomatic relief. Treatment should generally not exceed 8 to 10 days unless continuation is professionally monitored.
  • Timing: Oral forms can be taken with or without food; however, some protocols suggest taking after meals.
  • Preparation: For oral solutions, the bottle should be shaken well, and the provided measuring device must be used for accurate dosing. For IV administration, dilution with specific solutions (e.g., 0.9% sodium chloride) is required, and mixing with alkaline solutions is strictly forbidden due to incompatibility.
  • Impairment: Caution and monitoring are required for patients with severe hepatic or renal impairment as drug clearance may be reduced.

Recent Clinical Evidence

Research evidence / Overview of Studies for Cohexine (Bromhexine)


Evidence for Use in Conditions with Thick Phlegm

The established research into Cohexine was studied for conditions characterized by fluctuating or episodic manifestations where respiratory secretions are thick or highly viscid, such as chronic or acute bronchitis and bronchiectasis. This evidence base consists of many randomized controlled trials (RCTs) and systematic reviews accumulated over several decades.

Studies primarily examined outcomes related to physical discomfort by measuring the physical characteristics of the phlegm, including its thickness (viscosity) and volume. Trials also explored patient-reported outcomes describing perceived discomfort, such as the subjective ease of expectoration. Findings describing patterns observed in the studies regarding the physical characteristics of bronchial secretions are generally consistent. However, the reported clinical benefit on subjective discomfort may sometimes be described as modest, and findings were mixed regarding changes in objective pulmonary function tests.


Research on Supportive Use in Viral Respiratory Conditions

More recent, investigational research was studied for additional contexts beyond its traditional use, specifically in research contexts involving fluctuating or unstable symptoms related to severe viral infections. This evidence base is small and data are still emerging, primarily consisting of small-scale randomized controlled trials.

Researchers examined whether the drug was observed in studies monitoring severe clinical events, such as the need for ICU admission or mechanical ventilation. The research so far suggests that results are highly variable. Findings were mixed across the trials, and the overall certainty remains low for these specific indications due to the fact that sample sizes were modest.


Evidence Gaps and Areas of Uncertainty

The research on Cohexine presents several areas where certainty remains low. Follow-up durations were limited in many key trials, meaning that long-term effects are not fully established, particularly concerning the durability of any observed patterns. Similarly, regulatory reviews have noted that data for certain groups remain insufficient, specifically regarding the efficacy endpoints for very young children. The research describes group patterns, not personal outcomes.

Frequently Asked Questions (FAQ)

Common questions about Cohexine (FAQ)

Q: How long does it usually take to feel the effect of Cohexine?

The active ingredient is rapidly absorbed, with peak concentration in the blood plasma reached in about one hour. This is the timeframe described in official product information, which indicates how quickly the drug enters the systemic circulation.

Q: Can Cohexine cause difficulty sleeping?

Official product information states that certain central nervous system effects are possible adverse reactions, including dizziness and drowsiness. Although difficulty sleeping is not explicitly listed, the listed effects indicate the possibility of changes to the central nervous system. If you experience unusual effects, regulatory documents advise consulting a healthcare professional.

Q: If I miss a dose of Cohexine, what should I generally do?

According to regulatory patient leaflets, the protocol is that the dose is taken as soon as the patient remembers. A double dose must not be taken to compensate for the missed one. If it is almost time for the next scheduled dose, the protocol is to skip the missed dose and resume the normal schedule.

Q: Are there any common foods or drinks I should avoid while taking Cohexine?

Official regulatory information confirms the medicine can generally be taken with or without food. There are no specific or significant food or drink restrictions listed in the product's official labeling. Patients are generally advised to continue following any specific dietary guidance provided by their healthcare professional.

Q: How long does Cohexine stay in your system after stopping treatment?

Pharmacokinetic studies documented in official labeling show that the terminal elimination half-life of the drug varies widely, with reported figures ranging from approximately 13 to 40 hours. The half-life refers to the time it takes for the amount of active substance in the body to decrease by half. This indicates it can take several days for the active compound to be fully cleared from the body.

Q: Is it safe to take Cohexine if I have mild kidney issues?

Official regulatory documents indicate that caution and professional monitoring are applied to patients with severe kidney or severe liver impairment due to the risk of reduced drug clearance. While mild issues are not specifically detailed, the official guidance emphasizes that close professional attention is paid to severe cases.

Q: Does taking Cohexine affect my ability to drive?

Official product information notes that caution is warranted when performing tasks that require concentration, such as driving or operating machinery. This is due to the potential adverse effects of dizziness and drowsiness associated with the medicine. The official safety statement includes a general note regarding how individuals react to the drug prior to engaging in activities like driving.

Q: What should I do if a minor side effect of Cohexine bothers me?

Regulatory advice confirms that common side effects are generally mild and may pass quickly. Official guidance states that a healthcare professional should be consulted if any side effects are severe, persist, or worsen. This guidance is in place to ensure patient well-being and drug compatibility.

Q: Can Cohexine be crushed or split?

According to the Patient Information Leaflet, official documents specify that the tablet formulation is designed to be swallowed whole and is not intended to be crushed or chewed. This instruction is necessary because crushing the tablet may interfere with the intended release rate of the medication into the body.

Q: What happens if I accidentally take more Cohexine than I should?

Regulatory documents on overdosage state that symptoms can include stomach pain, vomiting, nausea, and difficulty breathing. The protocol outlined in official guidance for accidental overdosage involves immediate contact with a poison control center or seeking emergency medical attention.

Q: Does Cohexine interact with vitamins or herbal supplements?

Official guidelines include a recommendation that patients provide their healthcare professional with a list of all prescription and non-prescription medicines, including vitamins and herbal products. While specific interactions may not be listed, this ensures a professional review of the complete medication profile.

Q: Can older adults use Cohexine without special considerations?

Official product information notes that caution is applied when the medicine is administered to elderly or frail individuals. This is primarily due to the potential for reduced drug clearance, which may necessitate professional monitoring similar to those with severe liver or kidney issues.

Q: Is the medication Cohexine habit-forming?

Regulatory monographs explicitly state there are no known reports of dependence or habit-forming tendencies associated with the use of Cohexine. This information defines the drug's classification regarding its potential for misuse or addiction.

Q: Is it common to feel tired after starting Cohexine?

Official documents list drowsiness, which is a form of fatigue, as a potential adverse effect. This means it is a reported experience that some patients may encounter after starting the medicine. Official regulatory guidelines indicate that a healthcare professional should be consulted if tiredness is significant or persistent.

Q: What are the early signs that Cohexine is not working for my condition?

Official patient leaflets suggest that if symptoms do not improve, or if they worsen after a specified duration of treatment (such as 7 to 14 days), the protocol outlined in patient leaflets is to seek professional reassessment. This time frame indicates when to formally evaluate the drug’s effectiveness based on the original condition.

Q: Can Cohexine affect mood or cause anxiety?

While specific effects on mood or anxiety are not commonly listed as adverse reactions, official documents report central nervous system adverse effects such as headache and vertigo (dizziness). These effects are included in the known safety profile of the medicine.

Q: Does Cohexine interact with alcohol?

Official product warnings include a cautionary note regarding alcohol consumption during treatment. This is because the medicine has the potential to cause central nervous system effects, and combining it with alcohol may increase the effects of drowsiness or dizziness.

Q: What kind of monitoring is typically required while taking Cohexine?

Official product information states that monitoring of the patient is specifically recommended for individuals with severe hepatic (liver) or severe renal (kidney) impairment. This is to manage the risk of reduced clearance of the drug or its metabolites in these groups.

Q: Can Cohexine be taken with pain relief medication like ibuprofen?

Regulatory documents generally state there are no known significant interactions between Cohexine and pain relief medications like ibuprofen. Official guidance includes the recommendation to inform a healthcare provider of all other medications for a complete safety review.

How should Cohexine be stored and disposed of?

Official Storage and Disposal Requirements for Cohexine

Cohexine (Bromhexine) must be stored under specific conditions mandated by official regulatory labeling to ensure product stability and safety.

Storage and Protection Requirements
Temperature Range: Store at controlled room temperature, typically below 25 C or 30 C.
Prohibition: The medicine must be kept from freezing or exposure to excessive heat.
Protection: Store in a dry place and protect from light.
Container: Keep the product in its original container and ensure the cap is tightly closed (for liquids).

All medicine must be kept out of the sight and reach of children as a mandatory safety requirement.

Disposal Instructions

Unused or expired Cohexine must be disposed of according to local regulations. Official guidelines advise against disposing of the medicine via wastewater (e.g., flushing down the toilet) or ordinary household refuse.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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