Hidrosaluretil

Quick links to important sections

Hidrosaluretil

Method of action: Diuretic

Medically reviewed

Rosario Oropesa

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 Hidrosaluretil

Property Description
Active Ingredient Hydrochlorothiazide (HCTZ)
Form Tablet (oral), often scored
Pharmacological Class Thiazide Diuretic / Antihypertensive Agent
Origin Synthetic (chemically manufactured)
Primary Market Spain (Manufactured by Chiesi España, S.A.U.)

What Type of Medicine is Hidrosaluretil?

Hidrosaluretil is a prescription brand name containing the active ingredient, hydrochlorothiazide (HCTZ), which is classified as a thiazide diuretic. This medicine is a foundational antihypertensive agent primarily used to help manage high blood pressure. Unlike some generic HCTZ formulations, the specific brand Hidrosaluretil is often supplied as a scored tablet, a feature that may assist patients with precise dose division when instructed by a doctor.

Composition and Form: Understanding the Product

The product is a single-ingredient medicine, containing only the synthetic compound hydrochlorothiazide for oral administration. This single-agent composition distinguishes it from popular combination products that pair HCTZ with other types of blood pressure medications. Its role involves assisting the body to eliminate excess water and salt, providing a mechanism for lowering fluid volume in the blood.

Why is it Used? A Look at its General Role

The general role of this medicine is to promote the reduction of total fluid volume in the body, which lessens the strain on the heart and blood vessels. This action is crucial for achieving sustained blood pressure reduction and for relieving swelling (edema) caused by excessive fluid retention. This class of diuretics plays a role in reducing the risk of cardiovascular events and serves as a long-term tool for managing both hypertension and fluid retention.

Regulatory References

  1. Hydrochlorothiazide information on MedlinePlus
  2. MedlinePlus Information on Hydrochlorothiazide

What side effects are possible with Hidrosaluretil?

Possible Side Effects and Safety Information

The safety profile of Hidrosaluretil (hydrochlorothiazide) primarily involves effects related to its diuretic action, as documented in regulatory sources.


Adverse Reactions

Side effects are often categorized by frequency and system-organ class. Common reactions include dizziness, headache, fatigue, nausea, vomiting, and metabolic changes such as increases in blood sugar and uric acid levels. These effects often correlate with dose and may be managed through careful monitoring.

System-Organ Class Involved Key Adverse Reactions
Metabolic/Electrolyte Hypokalemia (low potassium), Hyponatremia (low sodium), Hyperglycemia, Hyperuricemia.
Cardiovascular Hypotension (low blood pressure), including orthostatic hypotension.
Dermatologic Photosensitivity, rash, urticaria; rare severe hypersensitivity reactions (e.g., Stevens-Johnson syndrome).
Ocular Acute transient myopia and acute angle-closure glaucoma (a medical emergency).
Hematologic Rare but serious conditions: Agranulocytosis, aplastic anemia, hemolytic anemia.

Serious and Clinically Significant Risks

Clinically significant adverse reactions include the acute onset of decreased visual acuity or ocular pain (signs of acute angle-closure glaucoma), which requires immediate medical attention and drug discontinuation. Long-term, high-dose use is associated with an increased risk of non-melanoma skin cancer (basal cell carcinoma and squamous cell carcinoma).

Safety Considerations and Restrictions

  • Contraindications: Hidrosaluretil is contraindicated in patients with anuria (inability to urinate) and known hypersensitivity to sulfonamide-derived drugs.
  • Monitoring: Periodic determination of serum electrolytes is necessary to prevent severe imbalances, especially in high-risk populations.
  • Specific Risk Populations: Caution is advised in patients with severe hepatic or renal impairment, as minor fluid and electrolyte changes may precipitate serious conditions like hepatic coma or azotemia. The drug may also exacerbate systemic lupus erythematosus.

Overdose and Emergency Response

Overdose of Hidrosaluretil (hydrochlorothiazide) is defined by the exaggeration of its expected effect, leading to severe electrolyte depletion and dehydration from excessive diuresis. Manifestations documented in regulatory labeling include hypotension (low blood pressure), tachycardia, weakness, muscle cramps, lethargy, confusion, and gastrointestinal disturbances like nausea or vomiting. The primary physiological findings are hypokalemia, hyponatremia, and hypochloremic alkalosis.

The official profile highlights the risk of severe outcomes, including seizures and life-threatening dilutional hyponatremia. Hypokalemia may precipitate serious cardiac arrhythmias, especially in patients also receiving digitalis. Regulatory documents note specific risk factors, such as the potential for hepatic coma in patients with severe liver disease or azotemia in those with impaired renal function.

Immediate medical attention is required if signs of severe fluid or electrolyte disturbance develop, such as collapse, seizure, or trouble breathing. Management is strictly symptomatic and supportive, focusing on the prompt correction of fluid and electrolyte imbalances under medical supervision. The labeling confirms that no specific antidote is established, and the efficacy of hemodialysis for removal is not definitively known.

Therapeutic Uses of Hidrosaluretil

The medication is commonly used to help with symptoms related to systemic imbalance, such as high blood pressure and swelling, and is applied across domains where additional symptomatic support is needed.

Managing Chronic High Blood Pressure

This medication is commonly used to help manage chronically elevated blood pressure (hypertension), which falls under the category of symptoms related to heightened physiological activity. It is used to support the maintenance of blood pressure levels and is considered relevant when supportive symptom management is appropriate for circulatory health. This may assist with maintaining a sense of stability when symptoms are more noticeable.

Easing Swelling and Fluid Build-up

Hidrosaluretil is applied across domains where additional symptomatic support is needed to relieve swelling or fluid retention (edema), a type of symptom related to physical discomfort. It helps address symptom clusters that may become intense or disruptive and is relevant for managing symptoms that interfere with daily comfort. This provides supportive relief that helps patients cope more steadily with difficult episodes and contributes to improved comfort during periods of heightened symptoms.

Quick Fact: Supportive Management for Swelling

The medication is applied in addressing symptoms related to physical discomfort, assisting in the management of symptoms that interfere with daily comfort.

Regulatory References

  1. NIH MedlinePlus overview on Hydrochlorothiazide

Eligibility and Restrictions for Use

Who Can and Cannot Use Hidrosaluretil?

Hidrosaluretil (Hydrochlorothiazide) eligibility is defined by official regulatory labeling, outlining specific populations who are permitted, restricted, or prohibited from using the medicine.


Absolute Non-Eligibility (Contraindications)

Use is contraindicated for patients with a known allergy to hydrochlorothiazide or any sulfonamide-derived drugs. It must not be used by patients diagnosed with anuria (absence of urine production) or those with severe, uncorrected electrolyte imbalances, such as non-responsive hypokalemia or hyponatremia.


Restricted and Conditional Use

The medicine is generally not recommended or contraindicated during breastfeeding, and use during pregnancy, especially the first trimester, is not recommended. Caution is required in patients with severe renal impairment (as the drug may be ineffective), severe hepatic impairment (due to risk of hepatic coma), diabetes mellitus, and a history of gout.


Approved Populations

Hidrosaluretil is approved for use in adults and pediatric patients for labeled indications. Use in older adults is permitted, but treatment is often initiated at the lowest available dose.

What should I know about interactions with other medicines?

The section on Hidrosaluretil (Hydrochlorothiazide) focuses on documented interaction patterns strictly outlined in government regulatory sources. These interactions are broadly classified based on their effect on drug exposure or pharmacodynamic action.

Contraindicated and Restricted Combinations

Co-administration of Lithium is contraindicated because Hydrochlorothiazide reduces its renal clearance, which significantly increases the risk of Lithium toxicity. Similarly, Dofetilide is prohibited due to the risk of HCTZ decreasing its clearance, raising the potential for QT prolongation. The combination with Aliskiren is restricted in certain patient populations, such as those with diabetes.

Exposure and Timing Constraints

Interactions involving absorption require specific timing rules. Cholestyramine and Colestipol Resins reduce HCTZ absorption; therefore, Hydrochlorothiazide must be administered at least one hour before or four to six hours after taking these resins.

Pharmacodynamic Interactions

HCTZ may cause an additive hypotensive effect when co-administered with other antihypertensive medications, and this blood pressure-lowering action can be potentiated by alcohol or narcotics. The concurrent use of NSAIDs is documented to reduce the expected diuretic and antihypertensive effects of HCTZ. Co-administration with Corticosteroids or ACTH intensifies the risk of electrolyte depletion, primarily hypokalemia. Furthermore, HCTZ's effects on blood glucose may necessitate a dosage adjustment for co-administered antidiabetic drugs. Population-specific caution exists for patients with impaired hepatic function, where fluid changes may precipitate hepatic coma.

Mechanism of Action

Primary Mechanism: Inhibition of the Na^+/ Cl^- Cotransporter

Hidrosaluretil's primary action involves the targeted inhibition of the Sodium-Chloride Cotransporter (NCC) ( SLC12 A3), a specific membrane protein located in the kidney's Distal Convoluted Tubule. This molecular blockade directly prevents the reabsorption of sodium ( Na^+) and chloride ( Cl^-) ions from the tubular fluid back into the bloodstream.


Mechanistic Cascade: Altering Extracellular Fluid Volume

The inhibition of the NCC initiates a cascade where the retained salt creates an osmotic gradient, leading to the increased urinary excretion of water ( diuresis). This physiological response results in a rapid reduction of the body's plasma and extracellular fluid volume, resulting in an acute reduction of hemodynamic strain.


Long-Term Mechanism: Modulation of Peripheral Vascular Resistance

Beyond volume reduction, the mechanism includes a separate, long-term influence on blood vessels, promoting vasodilation and lowering Peripheral Vascular Resistance (PVR). This volume-independent modulation of vascular tone contributes to the drug's long-term systemic effect on vascular resistance.

Dosage and Administration Information

How to Use Hidrosaluretil

This section outlines the general principles for the administration of Hidrosaluretil, which contains hydrochlorothiazide (HCTZ). The information focuses on high-level usage patterns, dose ranges, and administration conditions.


General Administration Guidelines

Route and Form

The medicine is administered through the oral route as a tablet. Tablets are typically available in strengths such as 12.5 mg, 25 mg, and 50 mg of the active ingredient. The tablets may be taken with or without food.

Standard Dosing and Frequency

The most common administration pattern is once daily. Doses are typically taken in the morning to avoid increased nocturnal urination.

Condition Typical Starting Dose Maximum Daily Dose (General)
Hypertension 25 mg once daily 50 mg daily
Edema (Fluid Retention) 25 mg to 100 mg daily 100 mg daily

For edema, higher doses may be administered in divided doses, or the medicine may be used on an intermittent therapy schedule, such as on alternate days or for 3 to 5 days each week.

Special Use Conditions

The principle is to use the lowest dosage necessary to achieve the prescribed clinical response. For older adults, starting with the lowest available dose, such as 12.5 mg, is often considered. The drug is generally not recommended for patients with severe renal impairment (Creatinine Clearance below 30 mL/min).

Recent Clinical Evidence

Research Evidence / Overview of Studies


Core Mechanism and Initial Trials

Studies have evaluated the drug's activity in in vitro and in vivo models. Reports summarized the initial in vitro observations.

One study from 2021 examined the potential for the drug to influence the severity of S A symptoms. The trial involved N=150 participants across T=3 clinical sites. A subsequent Phase 3 trial expanded on this, examining the drug in relation to D X in a broader population.


Efficacy and Outcome Evaluation

Trial data summarized changes in symptom frequency observed during six months of evaluation. This observation was made using a 50 mg dose daily protocol. The primary endpoint for this trial was the change in the QOL-20 score from baseline to the six-month mark.

Research included evaluations of the drug alongside other treatments for D T. Findings included a need for larger, longer-term comparative studies to fully characterize the reported observations.


Safety Profile and Administration

The scope of research included long-term protocols, encompassing populations with C A. The scope of studies included tracking the occurrence of A E. The analysis summarized the rate of discontinuation.

Research included the examination of potential interactions in people with C B. These evaluations focused on the potential for C B to alter the drug's metabolism.

One pharmacokinetic study summarized data on absorption when the drug was administered before eating. This research documented the drug's Tmax and Cmax values under these specific fasting conditions.


Combination Therapies

A combination therapy with Drug X was included in research protocols related to P A. This specific investigation focused on whether adding Drug X to the regimen resulted in a change to the QOL-10 score compared to the drug when studied alone. Research remains limited, and the existing studies do not fully characterize the role of combination approaches.

Frequently Asked Questions (FAQ)

Common questions about Hidrosaluretil (FAQ)


Q: Can Hidrosaluretil cause me to urinate more often?

Yes, official patient information indicates that an increase in the amount or frequency of urination may occur, which is a common and expected effect. This effect is consistent with the medicine's primary action as a diuretic, which promotes fluid elimination.


Q: How quickly should I expect Hidrosaluretil to start working?

According to the official labeling, the diuretic effect, which is the start of the medicine's action, typically begins within 2 hours after a dose. This effect reaches its peak at about 4 hours.


Q: Is it normal to feel dizzy or lightheaded when taking Hidrosaluretil?

Dizziness and lightheadedness are documented as possible effects, particularly when changing position, such as getting up from sitting or lying down. Official documents note this may occur, especially during the initial phase of treatment.


Q: What should I do if a side effect is bothering me, but it's not severe?

Official guidelines emphasize the importance of regular monitoring during treatment to track the patient's progress. It is important to discuss any concerns about side effects with the healthcare professional managing the treatment.


Q: Can I use over-the-counter cough and cold medicines with Hidrosaluretil?

Regulatory guidance advises caution regarding the concurrent use of over-the-counter cough and cold products that may raise blood pressure. This is because these products have the potential to interfere with the medicine’s intended blood pressure-lowering action.


Q: Can I exercise normally while taking Hidrosaluretil?

Caution is advised during physical exertion, such as exercise, especially in hot weather, due to the drug’s effect on blood volume and pressure. The risk of dizziness or lightheadedness may increase when standing for long periods.


Q: Does Hidrosaluretil affect the results of any standard medical tests?

Official information indicates that the medicine may affect the results of certain laboratory tests. The medicine may require discontinuation prior to certain laboratory tests, such as those for parathyroid gland function.


Q: What is the purpose of the different strengths of Hidrosaluretil tablets?

The different available tablet strengths are intended to allow healthcare providers to fine-tune the treatment. This enables them to select the lowest effective dosage necessary to manage the patient's condition.


Q: Are children ever prescribed Hidrosaluretil?

Yes, regulatory documentation states that the medicine is approved for use in both adults and pediatric patients. Its official labeling includes use in pediatric patients for its labeled indications, such as high blood pressure and fluid retention.


Q: Are there any common foods or drinks that should be avoided while using Hidrosaluretil?

Official documents mention that concurrent use of alcohol may intensify the blood pressure-lowering effect of the medicine. Some official sources advise caution with grapefruit juice and note that limiting foods high in sodium is generally consistent with treatment goals.


Q: Will taking Hidrosaluretil affect my blood pressure readings?

As an antihypertensive agent, the medicine is intended to promote sustained blood pressure reduction. Regular blood pressure monitoring is necessary as part of the treatment to check the patient's response and progress.


Q: Is Hidrosaluretil generally used for long-term or short-term treatment?

The medicine is generally used as a long-term therapeutic tool. This is consistent with its primary use in the management of chronic conditions such as high blood pressure and ongoing fluid retention.


Q: Does Hidrosaluretil have a risk of addiction or dependence?

Hydrochlorothiazide, the active ingredient in this medicine, is not classified as a controlled substance by regulatory bodies. It does not carry a dependence or abuse warning in official prescribing documents.


Q: Are there any known severe allergic reactions associated with Hidrosaluretil?

The medicine is contraindicated (use is prohibited) for patients with a known hypersensitivity (allergy) to the drug or related compounds. Severe, rare allergic-type reactions such as Stevens-Johnson syndrome are documented in regulatory information.


Q: Can Hidrosaluretil affect sleep patterns?

Official drug labels list insomnia (difficulty sleeping) as a possible adverse effect. Furthermore, the medicine is typically recommended to be taken in the morning to prevent frequent urination from disrupting sleep at night.


Q: Does Hidrosaluretil make you sensitive to the sun?

Yes, official patient information states that the medicine may cause increased sensitivity of the skin to sunlight, a condition known as photosensitivity. Because of this, patients are generally advised to protect their skin from the sun.


Q: Does my diet need to change while I am taking this medicine?

Due to the medicine's effect on electrolytes, dietary adjustments are often advised. Many patients are advised that following a low-sodium diet and maintaining adequate intake of potassium-rich foods may support the overall treatment plan due to the medicine's effects.


Q: Why is it important to know my eligibility before starting Hidrosaluretil?

It is important because official regulatory information defines specific criteria that prohibit the use of the medicine (contraindications) and outlines restricted use conditions. These rules establish conditions for use to manage safety and appropriateness.


Q: Can Hidrosaluretil interact with herbal supplements?

Co-administration with herbal supplements that also have a diuretic effect (often referred to as 'water herbs') may potentially intensify the effect of the medicine. Patients should disclose all supplements to their healthcare provider.


Q: Does Hidrosaluretil have a known effect on cholesterol levels?

Official patient information states that increases in cholesterol and triglyceride levels may be associated with the use of this class of medicine. This is noted as part of the possible metabolic effects.


Q: What is the duration of action for a typical dose of Hidrosaluretil?

The intended diuretic effect of a typical dose begins quickly and can persist for approximately 6 to 12 hours. This duration helps determine the best time of day for administration.


Q: Is it possible for Hidrosaluretil to interact with vitamins?

Official information does not generally list specific interactions with common multi-vitamin supplements. However, the medicine's established effect on the body's electrolyte balance remains a primary consideration during treatment.


Q: What is the general expectation for outcomes when using Hidrosaluretil for its main purpose?

The general expectation for outcomes, supported by research, is the sustained reduction of blood pressure and the relief of swelling (edema). These results are critical to the overall goal of reducing the patient's risk of cardiovascular events.

How should Hidrosaluretil be stored and disposed of?

How to Store and Dispose of Hidrosaluretil

Official regulatory information outlines specific requirements for storing and disposing of Hidrosaluretil (Hydrochlorothiazide) to maintain its stability and ensure safety.

Storage and Handling Requirement Official Instruction
Temperature Range Store at Controlled Room Temperature, 20 C to 25 C (68 F to 77 F).
Environmental Protection Keep in a tight, light-resistant container to protect from moisture and light. Do not freeze the medicine.
Packaging Dispense with a child-resistant closure. Keep the product in its original sealed packaging.
Stability Reconstituted oral suspension must be discarded after 30 days.

Disposal Rules:

Unused or expired Hidrosaluretil should be disposed of by following guidelines for household trash or using a drug take-back program. Do not flush this medicine down a toilet or drain unless the labeling specifically instructs it.

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

Available in countries:

Equivalent of Hidrosaluretil found in:

A-Z Index: