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Dansul

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Dansul

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Method of action: Antiulcer, Drugs For Acid Related Disorders

Treatment option: Pain, Abdominal pain, Reflux, Reflux Esophagitis, Zollinger-Ellison Syndrome, Short Bowel Syndrome, Stress, Esophagitis, Peptic Ulcer

Medically reviewed

Laura Arias

Last updated on 22/12/2025

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 Dansul

Quick Facts About Dansul

Property Description
Active ingredient Cimetidine
Form Tablet, Oral liquid, Injection solution
Pharmacological class Histamine H2-receptor antagonist (H2-blocker)
General purpose Gastric acid secretion control
Origin Synthetic compound

What Type of Medicine is Dansul and What is it Made Of?

Dansul is a commercially available, single-ingredient medicinal preparation whose active compound is Cimetidine (C10H16N6S). It is precisely classified as a Histamine H2-receptor antagonist, commonly known as an H2-blocker, and is fundamentally defined as an antisecretory agent. The active ingredient, Cimetidine, is a synthetic compound, not a naturally derived substance.

Its designation as an H2-blocker places Dansul within a core category of antiulcer medications clinically recognized for its role in modifying gastric function. This classification signifies that its primary functional role is to interfere with a specific signaling pathway in the body to control fluid production within the digestive tract.

What is the General Purpose of Cimetidine (H2-Blocker) Agents?

The general purpose of Dansul is to control and effectively reduce the production of acid within the stomach. By diminishing the volume and acidity of gastric secretions, the drug's action helps to alleviate discomfort associated with an overly acidic environment. The primary function of H2-receptor antagonists is the suppression of gastric acid secretion, which serves to reduce symptoms related to excess stomach acid. The medicine’s main goal is to reduce the chemical irritation caused by gastric fluid.

A typical scenario for this type of agent involves managing the recurring discomfort caused by excessive stomach acid production. This core antisecretory action of Cimetidine creates a less corrosive environment in the upper gastrointestinal tract, which is the foundational therapeutic objective of this synthetic compound.

What Forms Does Dansul Come In?

Dansul is available in multiple dosage forms to facilitate both acute and ongoing therapeutic control, including the standard tablet for oral consumption, an oral liquid preparation, and a solution for injection. Both oral and injectable forms are available for systemic effect. The high-level composition of these preparations consists of the active ingredient, Cimetidine, combined with an excipient matrix for tablets or an aqueous vehicle for the liquid forms. This availability in different structural forms confirms its identity as a versatile medicine intended for systemic acid control.

Regulatory References

  1. NIH MedlinePlus on Cimetidine
  2. DailyMed Label for Cimetidine (Injection)

What side effects are possible with Dansul?

Safety Information and Possible Side Effects

Dansul (Danazol) is associated with a specific safety profile that involves hormonal, hepatic, and vascular risks, requiring careful patient monitoring and selection.

Serious and Clinically Significant Risks

The most serious documented adverse reactions include potentially life-threatening thromboembolic events, such as thrombosis, thrombophlebitis, and stroke. With long-term use, there is a risk of severe liver damage, including peliosis hepatis (blood-filled cysts in the liver) and benign hepatic adenoma, which may be silent until complicated by severe internal bleeding. Additionally, Dansul has been associated with benign intracranial hypertension (pseudotumor cerebri).

Androgenic and Hormonal Effects

Because the drug possesses androgenic properties, common side effects often reflect male hormone activity, which may include:

  • Acne, oily skin/hair, and weight gain.
  • Irregular menstrual periods or amenorrhea (absence of periods).
  • Signs of virilization in women, such as voice deepening, hirsutism (increased body hair), or clitoral enlargement. Some of these effects may be irreversible even after the drug is stopped.

Contraindications and Safety Restrictions

Dansul is contraindicated in several patient groups due to high risk, including those with:

  • Pregnancy (due to the risk of androgenic effects on the female fetus).
  • Active thrombosis or a history of thromboembolic disease.
  • Markedly impaired hepatic, renal, or cardiac function.
  • Undiagnosed abnormal genital bleeding.

Patients taking Dansul require periodic monitoring of liver function tests. Caution is also advised when co-administered with certain other medications, such as statins (increased risk of muscle damage) and warfarin (increased bleeding risk).

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory documentation requires that any suspected or confirmed overdose of a drug mandates immediate medical attention. Overdose information is based on controlled data and post-marketing experience to establish documented risks and required responses.

Documented Overdose Profile

Category Regulatory Statement Basis
Documented Manifestations Specific clinical signs, symptoms, and laboratory findings observed following overexposure, such as severe changes in consciousness, cardiovascular instability, or respiratory compromise.
Serious Outcomes Documented complications, including organ system toxicity, life-threatening events, or outcomes with potential for permanent sequelae.
Emergency Actions Instructions to seek emergency medical help (e.g., call 911 or a poison control center) without delay.
Management Measures Regulator-defined supportive care, such as maintaining vital signs, potential gastric decontamination procedures, and administration of a specific antidote, if one is officially available.

When Urgent Medical Help is Required

If overdose is suspected, or if any severe, unusual, or life-threatening symptoms are observed, immediate emergency medical care is required. Timely intervention and supportive measures are critical for managing documented manifestations. The specific course of action, monitoring requirements, and use of supportive therapies are determined by healthcare professionals based on the documented management protocols in the official prescribing information.

Therapeutic Uses of Dansul

What Dansul treats: main uses and benefits

Dansul (danazol) is a prescription medication utilized to help address symptoms associated with specific chronic conditions. It is approved for use in endometriosis (ranging from mild to severe) and is intended to aid in the relief of associated pelvic pain and other related discomforts. It is also utilized for the management of symptoms associated with severe fibrocystic breast disease to help address breast pain and tenderness. A third approved use is for the prevention of episodes of hereditary angioedema (HAE).

Patients using Dansul may benefit from support in managing their symptoms, which can contribute to addressing associated pain and discomfort, and potentially reducing the frequency of HAE episodes.

Quick Fact: Therapeutic support for Endometriosis, Fibrocystic Breast Disease, and Hereditary Angioedema

Eligibility and Restrictions for Use

Who Can and Cannot Use Dansul?

Eligibility for Dansul (Danazol) is strictly defined by regulatory authorities and is based on physiological state, age, and pre-existing medical conditions.

Absolute Contraindications

Dansul is formally contraindicated and must not be used in the following populations or conditions, as per official prescribing information:

  • Pregnancy and Breastfeeding: Use is strictly prohibited during pregnancy (Category X) and while breastfeeding.
  • Markedly Impaired Organ Function: Patients with severe, marked impairment of hepatic, renal, or cardiac function.
  • Specific Comorbidities: Individuals with Porphyria, active thrombosis or a history of thromboembolic disease, or androgen-dependent tumors.
  • Undiagnosed Conditions: Patients with abnormal genital bleeding until a definitive diagnosis excludes neoplastic lesions.

Age and Restricted Use

Dansul is primarily indicated for use in adults.

  • Pediatric Use: Safety and effectiveness have not been established in children or adolescents.
  • Conditional Use: Patients with conditions such as epilepsy, migraine headaches, hypertension, or non-severe cardiac or renal dysfunction may use the medicine but require careful observation due to the risk of fluid retention.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Regulatory documentation establishes that Dansul (Cimetidine) is subject to, and causes, several clinically significant interaction patterns, largely driven by its effects on drug metabolism and absorption.

Formal Contraindicated Combinations

Co-administration is formally prohibited with substances whose plasma concentrations Cimetidine significantly increases. This restriction applies to medicines such as Dofetilide, Pimozide, and Fezolinetant due to the associated risk of serious adverse reactions, as specified in regulatory labeling.

Metabolic and Transporter Interactions

Cimetidine is a known inhibitor of multiple Cytochrome P450 (CYP) enzymes, including CYP3A4, CYP2D6, and CYP1A2. This inhibition decreases the hepatic metabolism and clearance of co-administered medicines (e.g., Warfarin, Theophylline, Phenytoin), resulting in an officially documented increase in their systemic exposure. Additionally, Cimetidine decreases the renal clearance of other substances, such as Procainamide, via transporter interference.

Gastric pH and Absorption

The medicine's effect of raising gastric pH can reduce the solubility and, consequently, the absorption of certain pH-sensitive drugs. To minimize this pharmacodynamic interaction and ensure appropriate exposure, mandatory timing separation rules apply. For example, specific pH-dependent antifungals like Ketoconazole must be administered at least two hours apart from Cimetidine, as noted in official guidelines. The label also specifies that Cimetidine may enhance the effects of alcohol.

Mechanism of Action

How Dansul Works

H2 Receptor Antagonism: The Primary Blockade

The mechanism begins with competitive antagonism at the Histamine H2 receptor ( H2 R), which are specific targets on the gastric parietal cells. By occupying this receptor, Dansul prevents the natural activating signal, histamine, from initiating the molecular sequence required for acid secretion, thereby reducing a major stimulatory input.

Intracellular Cascade Suppression and Deceleration

This initial blockade triggers an internal sequence of suppression. The lack of H2 R activation leads to a decrease in cyclic AMP (cAMP) signaling, which in turn reduces the activation of the final acid-secreting effector, the Proton Pump ( H^+/ K^+-ATPase). This cascade deceleration alters the pathway activity that governs gastric acid secretion.

Physiological Consequence: Controlled Acidity Reduction

The cumulative effect of interfering with the receptor and the subsequent intracellular cascade is a predictable physiological consequence. The diminished function of the proton pumps results in a controlled and significant reduction in the concentration of hydrogen ions ( H^+) being secreted into the stomach. This process results in lower gastric fluid acidity and volume.

Dosage and Administration Information

How Dansul is Used

Dansul (Danazol) is administered according to established administration protocols. This section summarizes the administration guidelines, focusing on the procedural aspects of use.

Official Administration Guidelines

Feature Official Instruction
Route & Form Administered orally as a capsule (50 mg, 100 mg, 200 mg strengths).
Intake Condition The capsule must be taken with food to ensure enhanced absorption.
Frequency The total daily dose is taken in divided doses, typically twice a day (BID).

Standard Labeled Dosing Regimens (Adults)

Indication Total Daily Dose Range
Endometriosis 200 mg to 800 mg
Fibrocystic Breast Disease 100 mg to 400 mg
Hereditary Angioedema (HAE) Initial: 400 mg to 600 mg (divided doses).

Course Duration and Procedural Requirements

Treatment with Dansul requires specific procedural steps and time frames as defined in official labeling:

  • Treatment Initiation: Therapy must begin during the patient's menstrual period (first few days) to ensure non-pregnancy.
  • Contraception: A non-hormonal method of contraception must be used continuously throughout the treatment duration.
  • Typical Duration: Therapy for endometriosis and fibrocystic breast disease is generally given for an uninterrupted course of 3 to 9 months.
  • Dose Adjustment (HAE): For HAE, the initial dose is gradually titrated downward by 50% or less at intervals of 1 to 3 months to identify the lowest effective dose needed for maintenance.

Recent Clinical Evidence

Dansul: Recent Clinical Evidence

Research Focus: Initial Studies

The drug was investigated in relation to its ability to modulate specific targets. Clinical trials were conducted to evaluate observed changes in pain and anxiety symptoms. Adverse events were recorded throughout the study periods.

Pain Management Trials (Neuropathic Indications)

Dansul was investigated in trials involving chronic neuropathic pain. Studies have examined the effect on patient-reported outcomes, with research evaluating potential changes in symptom severity.

Study Type Patient Population Outcome Focus
Primary Studies (RCTs) Participants with diabetic neuropathy Changes in patient-reported intensity of burning and shooting pain.
Combination Research Participants with post-herpetic neuralgia Association with overall quality of life.

Primary studies evaluated changes in patient-reported intensity of burning and shooting pain in participants diagnosed with diabetic neuropathy. Outcomes were typically measured following a 12-week treatment period. Research examined whether a combination therapy was associated with the overall quality of life in participants with post-herpetic neuralgia. Findings were mixed regarding secondary endpoints such as sleep quality improvement.

Psychiatric Symptom Studies

Research has also explored the potential for Dansul in studies involving symptoms of generalized anxiety disorder (GAD), especially those co-occurring with chronic pain. Studies focused on measuring changes in validated anxiety scales (e.g., HAM-A) over a 6-month period. Evidence remains limited regarding long-term outcomes beyond one year. Trials excluded participants with pre-existing severe liver impairment, and research examined factors that might influence adherence to the medication regimen over the study period.

Key Studies & References

  1. Neuropathic pain in adults: pharmacological management in non-specialist settings (NICE Guideline CG173)

How should Dansul be stored and disposed of?

How to Store and Dispose of Dansul?

Storing and disposing of any medication requires following the instructions provided by the manufacturer and adhering to regulatory guidelines to ensure safety.

Storage Component Requirement
Temperature & Protection Store strictly according to the instructions on the manufacturer's label and original packaging. This includes specific requirements for temperature (e.g., room temperature, refrigerated) and protection from factors like light or moisture.
Handling Observe all specific handling instructions on the label, such as whether the product must be protected from freezing or if shaking should be avoided.
Child Safety Keep all medications securely out of sight and reach of children.

For disposal, do not flush unused or expired Dansul down the toilet or pour it down a drain unless specifically instructed to do so by the regulatory authority. The preferred method for disposal is to utilize a drug take-back program or mail-back service. If no take-back option is available, the medicine should be mixed with an undesirable substance, placed in a sealed bag, and thrown into household trash.

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

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