Tacardia

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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 Tacardia

Tacardia is a synthetic, prescription-only cardiovascular medicine used to help manage high blood pressure, defined by its active compound, Losartan. It is positioned within the cardiometabolism segment.

Property Description
Active ingredient Losartan Potassium
Form Film-Coated Oral Tablet
Pharmacological class Angiotensin II Receptor Blocker (ARB)
Common use Management of systemic arterial hypertension
Origin Synthetic, non-peptide compound

Pharmacological Identity and Type

Tacardia is classified as an Angiotensin II Receptor Blocker (ARB), belonging to the pharmacological group known as Sartans. This classification confirms its therapeutic function as an antihypertensive agent. The medicine is a single-ingredient product, whose core component is Losartan Potassium, a non-peptide compound that was the first of its kind to be approved within the ARB class. Losartan is recognized as a foundational therapy for managing high blood pressure and is utilized for its therapeutic application in certain patients requiring cardiovascular and renal protection.


Composition and Delivery Form

Tacardia is an oral agent supplied exclusively as a film-coated tablet, designed for systemic action following ingestion. The composition involves the active ingredient, Losartan Potassium, combined with various solid excipients that compose the tablet matrix. This standardized oral form is integral to providing a consistent and convenient delivery method, supporting the daily, long-term therapeutic control required for chronic conditions such as hypertension. Pharmacologically, Losartan is a prodrug that requires partial conversion in the liver to its more potent active metabolite, a key feature that dictates its processing in the body.


General Mechanism and Purpose

The overall purpose of Tacardia is to help control and reduce elevated blood pressure. The Losartan component achieves this by selectively blocking the AT1 receptors, thereby preventing a powerful hormone from causing blood vessels to tighten. This characteristic action of the ARB class promotes vasodilation, the relaxation of the arteries, and consequently reduces peripheral vascular resistance. This mechanism is pivotal to the medicine’s function in stabilizing blood pressure and mitigating cardiovascular stress associated with systemic arterial hypertension.

Regulatory References

  1. Losartan - StatPearls - NCBI Bookshelf
  2. Losartan: MedlinePlus Drug Information

What side effects are possible with Tacardia?

The safety profile of Tacardia, whose active compound is Losartan Potassium, is categorized by regulatory bodies based on the frequency and severity of reported adverse reactions.

Frequency-Classified Adverse Reactions

Adverse reactions are officially grouped by System-Organ Class (SOC) and incidence:

  • Common (occurring in ge 1% to 10% of patients) reactions include dizziness, upper respiratory infection, nasal congestion, and back pain. Hyperkalemia (high blood potassium) is also a common metabolic finding.
  • Uncommon reactions (ge 0.1% to < 1%) include somnolence (drowsiness), vertigo, edema (swelling), and rash.
  • Rare reactions (< 0.1%) include angioedema and hepatitis.

Serious Safety Considerations

The most significant safety constraint is the Boxed Warning regarding Fetal Toxicity. Tacardia is contraindicated during the second and third trimesters of pregnancy due to the risk of injury and death to the developing fetus. Other serious but rare documented reactions include angioedema (swelling of the face, lips, or throat) and deterioration of renal function, which can progress to acute renal failure, particularly in susceptible patients. Symptomatic hypotension (severely low blood pressure) is a risk, often noted at the initiation of treatment.


Population and Concomitant Use Restrictions

The label explicitly states that Tacardia is contraindicated for use in pregnancy. Additionally, coadministration with aliskiren is contraindicated in patients with diabetes due to an increased risk of renal impairment and hyperkalemia. Due to the risk of hyperkalemia and renal function changes, regulatory documents stress the necessity for periodic monitoring of serum potassium and renal function in susceptible patients. Older adults may exhibit increased sensitivity to the medicine's effects.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documentation for Tacardia (Losartan Potassium) outlines the recognized clinical manifestations and required emergency actions in the event of an overdose.


Overdose Scope

Element Regulatory Statement
Documented overdose presentations The most likely manifestations of overdose are hypotension (low blood pressure) and tachycardia (increased heartbeat); bradycardia (decreased heartbeat) may also occur from parasympathetic stimulation.
Physiological systems affected Primarily the cardiovascular system.
Population-specific overdose notes Neonates with a history of in-utero exposure should be observed for potential hypotension and renal failure.
Emergency-response statements Symptomatic and supportive treatment must be instituted. Hemodialysis is not effective for the removal of the active compound or its active metabolite due to high protein binding.

When Immediate Medical Help is Required

Urgent medical help should be sought for any suspected overdose. Immediate contact with emergency services is required if the individual experiences signs of profound hypotension, or develops severe outcomes such as collapse, trouble breathing, or seizure. Management must focus on stabilizing the clinical effects.


Official Overdose Statements

  • Overdose may present with cardiovascular symptoms, primarily hypotension and heart rate changes.
  • There is no specific antidote documented for Losartan overdose.
  • Management is strictly limited to symptomatic and supportive treatment to address the clinical manifestations.

Connection to the overall overdose profile

Regulatory documents define the Tacardia overdose profile based on severe hemodynamic instability, specifically the presentation of low blood pressure and heart rate abnormalities. The official guidance requires the immediate institution of supportive treatment and notes that interventions like hemodialysis are ineffective for compound clearance. Severe clinical manifestations are the stipulated conditions under which immediate medical help must be sought, as per governmental instructions.

Therapeutic Uses of Tacardia

What Tacardia Treats: Main Uses and Benefits

Tacardia (Losartan) is a medicine relevant to the cardiovascular domain applied in addressing conditions marked by increased physiological stress and structural damage associated with sustained high blood pressure, generally focusing on organ protection and risk mitigation.

This medication primarily supports the long-term management of elevated blood pressure, but its use extends to specialized scenarios. It is relevant in managing systemic arterial hypertension, specifically may assist in managing symptoms that create noticeable physiological strain related to cerebrovascular or coronary events in patients with Left Ventricular Hypertrophy (LVH). It is also commonly applied in clinical settings to help manage progressive kidney damage associated with Type 2 Diabetes (diabetic nephropathy), and may be part of symptomatic management for blood pressure and heart failure in patient groups who experience difficulty with other relevant treatments.

Quick Fact: Relevant for Long-Term Systemic Stress


Key Therapeutic Focus

This medicine is commonly used across conditions presenting with systemic or localized discomfort. Its use may assist in moderating the progression of diabetic nephropathy and supports general well-being during symptomatic phases related to cardiovascular health.

Regulatory References

  1. NIH MedlinePlus overview of Losartan

Eligibility and Restrictions for Use

Tacardia (Losartan) eligibility is strictly defined by regulatory documents based on patient population, age, and specific health conditions. The medicine is contraindicated and must not be used by several groups. Use is prohibited in women who are in the second or third trimester of pregnancy, with immediate discontinuation advised if pregnancy is detected. It is also contraindicated for patients with a known hypersensitivity to Losartan or its components, and in those with severe hepatic impairment. A further restriction applies to patients with diabetes or renal impairment who are receiving the medicine Aliskiren; this combination is strictly contraindicated.

The medicine is approved for use in adults for all labeled indications. For pediatric patients, use is established for treating hypertension in children aged 6 to 18 years. Use is not recommended for children under 6 years of age or in children with severe renal dysfunction. Special consideration is given to patients with a history of mild-to-moderate hepatic impairment or those with intravascular volume depletion, where a lower starting dose is typically necessary. Use during lactation is generally not recommended.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory documents for this product define several critical drug interactions that may affect patient safety or require dose adjustments.

Interacting Drug Categories and Specific Products

Interaction Domain Primary Constraint / Requirement
Monoamine Oxidase Inhibitors (MAOIs) Absolute Contraindication. Requires a 14-day washout period between discontinuing the MAOI (for psychiatric disorders) and starting this product, and vice-versa, due to the risk of hypertensive reactions.
Drugs Metabolized by CYP2D6 Requires dose reduction for the co-administered drug (e.g., certain antidepressants, antipsychotics, beta-blockers) because this product inhibits the CYP2D6 enzyme, increasing the other drug's exposure.
Drugs that Lower Seizure Threshold Requires caution when co-administered to account for an additive risk of seizure.
Dopaminergic Drugs Use with agents like Levodopa or Amantadine may result in Central Nervous System (CNS) toxicity.
CYP2B6 Inducers Products like Ritonavir or Efavirenz can decrease this medicine’s plasma levels by inducing CYP2B6 metabolism, which may necessitate an increase in this medicine's dose based on clinical response, without exceeding the maximum recommended level.

Other Relevant Interaction Notes

This medicine has been documented to cause false-positive urine screening test results for amphetamines. Additionally, the official labeling includes warnings regarding the concomitant use of alcohol and its potential additive effects.

Mechanism of Action

Modulating Cardiac Electrical Activity

Tacardia acts as a modulator of cardiac ion channels, primarily targeting the voltage-gated channels responsible for the flow of ions, such as Na^+ and K^+, within myocardial cell membranes. This targeted interaction directly influences the heart's action potential (electrical impulse), altering the speed and timing of electrical conduction to influence the effective refractory period and subsequent impulse propagation. This activity restricts the tissue's capacity for rapid, sustained electrical signaling.

Modifying Signaling Pathways

The drug's mechanism extends to systems involving heightened sympathetic or stress-related signaling, particularly affecting neuro-humoral pathways like the adrenergic system. By modulating the effects of specific transmitters or mediators on the heart, Tacardia alters the dynamics of processes driven by these signaling patterns, reducing the excitability of cardiac tissue.

Tacardia also engages in mechanistic cascades by initiating or suppressing specific intracellular signal transduction sequences. This action modifies early molecular steps, influencing the functional state of pathways, which alters the physiological coupling of electrical and mechanical activity.

Dosage and Administration Information

How to Use Tacardia

Tacardia, whose active ingredient is Losartan Potassium, is administered exclusively through the oral route as a film-coated tablet. Treatment is typically managed over a long-term (chronic) duration to assist in managing sustained conditions such as systemic hypertension.

Tacardia is generally taken once daily, and administration may occur with or without food. To help maintain consistent therapeutic levels, the dose should be taken at approximately the same time each day.


Official Dosing Regimens

The standard approach for adults with hypertension involves a starting dose of 50 mg once daily. The typical maintenance range is between 25 mg and 100 mg once daily, with 100 mg being the maximum recommended daily dose for most indications. Dosage adjustments, or titration, may occur three to six weeks after initiation if the initial response is insufficient.


Administration for Specific Populations and Scenarios

Population / Scenario Official Starting Dose Instruction
Hepatic Impairment (Mild to Moderate) Lower initial dose of 25 mg once daily is recommended.
Volume-Depleted Patients A starting dose of 25 mg once daily is specified.
Pediatric Patients (age 6 years and older) Starting dose of 0.7 mg/kg once daily (up to 50 mg total).

If a dose is missed, the dose is typically taken as soon as remembered. However, if it is almost time for the next scheduled dose, the missed dose is skipped; two doses must not be taken at once to make up for a missed dose.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Tacardia


Evidence for Use in Managing Systemic Arterial Hypertension

This section will summarize the structure of Randomized Controlled Trials (RCTs) and meta-analyses exploring Losartan in the context of systemic arterial hypertension. It will detail the types of outcomes measured in these studies, primarily focusing on blood pressure change and the tracking of major cardiovascular events.

Research has explored how Losartan was studied for its effects on systemic or functional imbalance associated with high blood pressure in adults and children. Findings describe patterns observed in the studies where Losartan was consistently observed with a change in measured BP across the population studied. Longer-duration research monitored the occurrence of major cardiovascular events, such as nonfatal stroke and heart attack, to see how symptoms evolved in the observed populations over several years.

However, the results apply only to the populations studied, and comparative evidence is lacking against the full spectrum of other blood pressure medications currently available.


Evidence for Stroke Risk Reduction in Hypertensive Patients with LVH

This part will focus on the design and scope of the major long-term, active-controlled outcome trials that specifically studied Losartan in adults with hypertension and electrocardiographic evidence of Left Ventricular Hypertrophy (LVH). It will describe the study's primary objective: measuring the incidence of fatal and nonfatal stroke events.

One large, long-term, active-controlled trial monitored the occurrence of stroke and cardiovascular death in adults (typically 55 years and older) with hypertension. Research describes patterns observed when monitoring the incidence of fatal and nonfatal stroke events in the Losartan-based regimen versus the specific beta-blocker-based regimen used for comparison.

It is important to note that this evidence was derived from a direct comparison against only one specific beta-blocker. Furthermore, the pattern observed regarding the composite outcome differed in the Black patient subgroup evaluated.


Evidence for Progressive Kidney Damage in Type 2 Diabetes

This module will outline the nature of the multinational, placebo-controlled trials conducted to assess Losartan’s application in patients with Type 2 Diabetes and signs of nephropathy. The summary will address the composite renal endpoints and surrogate markers (like changes in serum creatinine and proteinuria) that were examined over the follow-up periods.

Losartan was evaluated in multi-year, randomized, placebo-controlled trials focused on patients diagnosed with Type 2 Diabetes who were also presenting with signs of kidney damage. Findings indicate patterns related to a lower incidence of the composite renal endpoint in the Losartan-treated population when compared to the placebo group. Analysis of the individual components of this endpoint suggests that the incidence of doubling serum creatinine and End-Stage Renal Disease (ESRD) tracked a lower pattern in the Losartan group.

Certainty remains low due to the reliance on a composite endpoint that includes surrogate markers, which is associated with lower certainty in the evidence. The primary data is derived from studies where the follow-up durations were limited.

Key Studies & References

  1. Losartan (MedlinePlus Drug Information)

Frequently Asked Questions (FAQ)

Common questions about Tacardia (FAQ)


Q: Is Tacardia used for conditions other than the primary one?

Official documents describe Losartan Potassium (Tacardia) as approved for more than one use. These include managing systemic arterial hypertension (high blood pressure), lowering the risk of stroke in patients who have hypertension and Left Ventricular Hypertrophy (LVH), and addressing certain aspects of kidney disease in specific patients with Type 2 diabetes.


Q: Is Tacardia a blood thinner or a blood pressure medicine?

Tacardia is classified as an Angiotensin II Receptor Blocker (ARB), which is a type of medicine used to help manage and reduce elevated blood pressure. It is not classified as a blood thinner, as its primary function is to promote the relaxation of blood vessels, thereby lowering pressure.


Q: Is it normal to feel slightly tired when first starting Tacardia?

Adverse reactions reported in official documents include dizziness and, less commonly, somnolence (drowsiness) or fatigue. Because dizziness is a common finding, occurring in 1% to 10% of patients during trials, these effects can sometimes be noted when treatment is first initiated.


Q: Are the side effects of Tacardia the same for everyone?

No, reported side effects are categorized based on the statistical frequency with which they occurred across different patient populations in controlled clinical trials. For example, some effects are Common (affecting up to 10% of people), while others are Uncommon or Rare. This indicates that not all individuals will experience the same effects.


Q: Does Tacardia affect liver or kidney function?

Official information states that Tacardia is contraindicated (must not be used) in patients with severe hepatic (liver) impairment. Furthermore, official documents warn of a risk of deterioration of renal function (kidney function) and stress the necessity for regular monitoring of kidney health in susceptible patients during treatment.


Q: Can older people use Tacardia safely?

Use in older adults is established for appropriate indications. However, regulatory documents specifically note that older adults may exhibit increased sensitivity to the medicine's effects. A healthcare provider typically determines the appropriate starting dosage and monitoring plan based on official guidelines.


Q: What are the main findings from the clinical trials for Tacardia?

Studies tracked major cardiovascular events, primarily observing sustained decreases in blood pressure. The research indicated a lower incidence of stroke in hypertensive patients with Left Ventricular Hypertrophy (LVH) compared to a specific beta-blocker. It also described a lower incidence of the composite renal endpoint in Type 2 diabetic patients compared to placebo.


Q: Does Tacardia help prevent future health problems?

The medicine is approved for the ongoing management of high blood pressure. Official indications include lowering the risk of stroke in certain adults with hypertension and LVH, and helping to slow the progression of kidney disease in specific Type 2 diabetic patients. These indications reflect observed long-term benefits in clinical studies.


Q: How long does it usually take to notice Tacardia starting to work?

Official documents indicate that the full therapeutic effect of the medicine may require up to six weeks of consistent use. Dosage adjustments by a healthcare provider may occur three to six weeks after starting treatment if the initial blood pressure response is not sufficient.


Q: Can Tacardia be taken with common over-the-counter pain relievers?

Official information includes warnings regarding potential interactions with Nonsteroidal Anti-inflammatory Drugs (NSAIDs), which include common pain relievers like ibuprofen or naproxen. Combining these medicines may increase the risk of reduced blood pressure effects or renal (kidney) failure. Regulatory documents indicate the importance of informing a healthcare provider about all OTC products being used.


Q: Does Tacardia interact with herbal supplements like St. John's Wort?

Official documentation advises that prescription and nonprescription medicines, vitamins, nutritional supplements, and herbal products should be discussed with a healthcare provider. This is because some herbal products may interact with the medicine, and should only be used in line with professional guidance.


Q: Are there any foods or drinks I need to avoid while on Tacardia?

Official documentation includes specific warnings regarding the consumption of alcohol due to its potential additive effects. Additionally, there are warnings about avoiding potassium-containing salt substitutes and over-the-counter potassium supplements because of the risk of developing hyperkalemia (high blood potassium).


Q: Is Tacardia safe to use long-term?

Tacardia is officially prescribed and administered for a long-term (chronic) duration to help manage sustained conditions such as high blood pressure. Clinical studies described in regulatory texts have followed patients for up to three years, tracking safety and efficacy outcomes over that period.


Q: What is the risk of dependence or addiction with Tacardia?

Tacardia (Losartan Potassium) is an Angiotensin II Receptor Blocker (ARB) used for blood pressure management. It is not classified as a controlled substance by regulatory bodies, and official documentation contains no evidence suggesting a risk of dependence or addiction.


Q: What is the chemical name for Tacardia?

The active ingredient in Tacardia is Losartan Potassium. Chemically, it is classified in official documents as a synthetic non-peptide compound that was the first of its kind to be approved in the Angiotensin II Receptor Blocker (ARB) class.


Q: Is a metallic taste in the mouth a known side effect of Tacardia?

Dysgeusia (altered taste perception, which includes metallic taste) has been reported in post-marketing surveillance for Losartan. This indicates that the effect was noted after the initial clinical trials were completed, but its frequency is not common.


Q: Does Tacardia cause weight gain or weight loss?

Changes in weight were not reported as a common or uncommon side effect in the official clinical trial data. While weight change was not a common or uncommon side effect reported in trials, official documents note that sudden or unexplained fluid retention, a potentially serious event, should be monitored.


Q: Can people with diabetes use Tacardia?

Yes, Tacardia is approved for use in specific patients with Type 2 diabetes who also have signs of kidney disease. However, its use is strictly contraindicated in diabetic patients who are also being treated with the medicine aliskiren.


Q: Does Tacardia interact with caffeine?

Caffeine is not listed as a specific interaction domain in official documents. However, because high amounts of caffeine can temporarily increase blood pressure, some sources suggest that excessive consumption may potentially reduce the overall blood-pressure-lowering effect of the medicine.


Q: Is there a maximum amount of time someone can take Tacardia?

Tacardia is prescribed for the long-term (chronic) management of sustained conditions like high blood pressure. There is no maximum duration specified in official documentation, as treatment is typically continued for as long as needed to control the condition.


Q: Can Tacardia be crushed or split if it is hard to swallow?

Official administration advice states that Losartan tablets should generally be swallowed whole with a glass of water. Some specific tablet formulations may be scored to allow for division into equal doses, but confirmation of splitting or crushing instructions is typically found on the specific product labeling or provided by the dispensing pharmacist.


Q: Why do official documents warn about combining Tacardia with grapefruit juice?

Grapefruit and grapefruit juice may interfere with the way the body converts Losartan to its more active form. This change in metabolism could potentially decrease the overall effectiveness of the medicine, which is why warnings are included in official documentation.


Q: How soon after starting Tacardia will my doctor schedule a follow-up test?

Official documentation notes that it is important for a healthcare provider to check progress at regular visits to ensure the medicine is working correctly. Blood and urine tests are often needed to monitor for unwanted effects, such as elevated potassium (hyperkalemia) or changes in kidney function.


Q: What happens to the body if Tacardia is taken for many years?

Long-term clinical studies, some of which lasted several years, tracked patients to observe cardiovascular outcomes, such as the incidence of stroke or heart attack, and observed sustained patterns of change in certain markers. The goal of long-term use is to provide ongoing control of the underlying condition.


Q: Is there a link between Tacardia and hair loss?

Alopecia (hair loss) has been noted as a finding in post-marketing surveillance reports for Losartan. This indicates that it is not considered a common or frequent side effect based on initial clinical trial data.


Q: How long does Tacardia stay in your system after the last dose?

Official pharmacokinetic data indicates that the medicine has a short elimination time. The active compound, Losartan, has a half-life of about 2 hours, while its more potent metabolite, which continues to work in the body, has a longer half-life of approximately 6 to 9 hours.


Q: Are people with breathing problems eligible to use Tacardia?

General breathing problems are not listed among the official contraindications for Tacardia. However, one of the serious adverse reactions noted is angioedema, which involves swelling of the face or throat that can cause difficulty breathing and requires immediate medical attention.


Q: Is Tacardia part of a standard treatment plan for the condition it treats?

Tacardia (Losartan) is classified as an Angiotensin II Receptor Blocker (ARB) in official documents. It is clinically recognized and widely supported by pharmacological studies as a foundational therapy for the management of high blood pressure.


Q: Can I get Tacardia without a prescription in some countries?

Based on the official data from major regulatory bodies, Tacardia is uniformly defined as a prescription-only cardiovascular medicine. It requires authorization from a healthcare professional for dispensing.


Q: Does Tacardia cause vivid dreams or sleep disturbances?

Official documents list insomnia (inability to sleep) as a Common side effect and general sleep disorder as Uncommon. Dream abnormality, including vivid dreams, has also been reported through post-marketing surveillance.


Q: Are there any known long-term side effects that appear years later?

Adverse reactions are classified by frequency across clinical trials. While there is no specific official list of side effects that only appear years later, the official labeling stresses that certain serious reactions, like deterioration of renal function or high blood potassium, require periodic monitoring during the course of long-term treatment.


Q: Does Tacardia affect hormone levels?

The mechanism of action involves blocking the receptor for Angiotensin II, which is a powerful hormone that helps control blood pressure and also stimulates the release of aldosterone. By blocking this pathway, the medicine indirectly affects the levels and action of these hormones.


Q: Is it necessary to avoid alcohol completely while taking Tacardia?

Official labeling includes warnings about the simultaneous use of alcohol and its potential additive effects. Official guidance notes that alcohol intake is typically discussed with a healthcare provider due to the potential for additive effects.


Q: What specific type of research was required for Tacardia's approval?

Regulatory documents describe the use of various study types, including Randomized Controlled Trials (RCTs), long-term active-controlled outcome trials, and multinational placebo-controlled trials. These were used to assess the medicine’s effects on blood pressure, cardiovascular risk, and kidney function.

How should Tacardia be stored and disposed of?

The storage and disposal of Tacardia (Losartan Potassium) must follow official regulatory requirements to ensure product stability and public safety.

Scope Item Official Regulatory Requirement
Storage Temperature Controlled Room Temperature: 20 C to 25 C (68 F to 77 F). Brief excursions are permitted.
Container & Handling Keep the medicine in the original container, tightly closed, and protected from excess heat, light, and moisture. Do not freeze.
Prohibited Environment Do not store in the bathroom or near sources of heat, as required by stability mandates.
Child Protection Mandatory to keep out of the sight and reach of children and pets, stored in a secure 'up and away' location.
Disposal Instructions Do not flush down the toilet. The preferred method is using a drug take-back program. If unavailable, tablets must be mixed with an undesirable substance (e.g., used coffee grounds) and sealed in a bag before disposal in household trash.

These official rules define that the medicine must be protected from environmental degradation. Disposal is managed by a public safety protocol that avoids environmental contamination and prevents accidental exposure.

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

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