Covance

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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 Covance

Core Component and Identity

Covance is a brand name for a prescription-only medication whose therapeutic action is attributed to its sole active ingredient, Losartan potassium. This drug is a synthetic small molecule developed for high efficacy and is specifically formulated for oral administration as a film-coated tablet. Its status is strictly Rx, requiring professional oversight. Losartan is the therapeutic agent, acting as a single active ingredient product, a characteristic that allows for the precise management of a patient's pharmacological profile. Losartan works by targeting a hormonal pathway to control vascular function.


Classification and General Benefit

Covance belongs to the specific class of antihypertensive agents known as Angiotensin II Receptor Blockers (ARBs), or Angiotensin II Receptor Antagonists. This classification signifies that the drug's action is focused on selectively regulating the body's Renin-Angiotensin-Aldosterone System (RAAS), a mechanism for blood pressure control. The medication functions by blocking the effects of the hormone Angiotensin II on specific vascular receptors, which causes blood vessels to relax and widen. This targeted action offers a means of circulatory management. The medication’s general purpose is to lower pressure and ease the strain on the circulatory system, with a typical use scenario being the long-term maintenance of circulatory health. The resulting physiological effect is the reduction of elevated blood pressure that defines this product's purpose.

Regulatory References

  1. Losartan Drug Information - MedlinePlus

What side effects are possible with Covance?

Possible side effects and safety information

The safety profile of Covance (Losartan potassium) is derived from extensive regulatory documentation and classified adverse reaction data. This information is formally organized by the frequency of occurrence and the specific system-organ classes affected, as defined by government health authorities.


Adverse Reaction Classification

Classification Examples of Reactions
Most Common Dizziness, upper respiratory infection, nasal congestion, and back pain.
Common Headache, diarrhea, muscle cramps, and metabolic changes like hyperkalemia or hypoglycemia (observed in specific patient groups).
System Classes Nervous System (dizziness), Musculoskeletal (back pain), and Renal/Urinary systems.

Serious Adverse Reactions and Safety Constraints

Official labeling identifies specific serious events and constraints. Angioedema (swelling of the face, lips, or throat) is a rare but serious adverse reaction reported with this medication. Fetal Toxicity is a critical safety consideration: use during the second and third trimesters of pregnancy is contraindicated, as it can cause injury and death to the developing fetus. The medication's label notes a risk of symptomatic hypotension that may occur, particularly after the first dose or following a dose increase. Renal function deterioration and increased serum potassium (hyperkalemia) require careful monitoring in susceptible individuals. Furthermore, co-administration with aliskiren is contraindicated in patients with diabetes or moderate-to-severe renal impairment. These classifications and constraints structure the official risk profile of the medication.

Overdose and Emergency Response

Overdose and when to Seek Help (Losartan)

This information describes the official regulatory profile for Covance (Losartan) overdose and is not a substitute for medical advice.


Documented Manifestations and Emergency Action

The primary clinical manifestations of an overdose with Losartan are related to its main effect of lowering blood pressure. The most likely symptoms reported in regulatory documentation are profound hypotension (severely low blood pressure) and changes in heart rate, specifically tachycardia (fast heart rate), though bradycardia (slow heart rate) may also occur due to vagal stimulation. Overdose can also affect electrolyte balance, posing a risk of hyperkalemia.

Action Required Official Guidance Statement
Immediate Action Seek emergency medical attention immediately, such as contacting a hospital emergency department or Poison Control Centre, even if no symptoms are present in the case of suspected overdose.
Treatment Focus Management involves general supportive treatment, continuous monitoring of vital signs, and correction of volume depletion (e.g., intravenous fluids).

Management Constraints

There is no specific antidote for Losartan listed in the product labeling. Furthermore, regulatory information states that Losartan and its active metabolite are not removed by hemodialysis due to their high plasma protein binding, which limits one potential supportive measure in severe cases. Continuous monitoring of blood pressure, cardiac status, electrolytes, and renal function is critical.

Therapeutic Uses of Covance

Quick Facts: Uses of Covance

  • Supports the management of high blood pressure (hypertension).
  • Assists in reducing the potential for stroke in individuals with high blood pressure and an enlarged left ventricle.
  • Contributes to kidney protection in people with type 2 diabetes and high blood pressure.

What Covance Treats: Main Uses and Benefits

Covance is a prescription medication indicated for several specific therapeutic areas related to cardiovascular health and kidney function. The primary use of this medication is to support the management of hypertension, or high blood pressure. By assisting in the reduction of elevated blood pressure, the medication may contribute to mitigating the risk of serious cardiovascular events.

In individuals with high blood pressure and an enlarged left ventricle (left ventricular hypertrophy), Covance is utilized to help lower the potential for stroke. Lowering blood pressure in this population is a component of comprehensive risk management for cardiac and neurological outcomes.

Furthermore, Covance is prescribed to contribute to kidney protection in patients who have type 2 diabetes along with a diagnosis of high blood pressure. It is important to consult a healthcare provider for a thorough overview of the approved uses and to determine if this medication is appropriate for an individual's specific health status and needs.

Eligibility and Restrictions for Use

This information is strictly based on official government regulatory documents and defines which patient populations are eligible and ineligible for use.

Who Must Not Use Covance (Contraindications):

The medicine is absolutely contraindicated (must not be used) in several specific patient groups due to regulatory mandates established by agencies like the EMA and FDA:

  • Hypersensitivity: Patients with a known allergy to losartan, hydrochlorothiazide, or any component of the formulation, including those with a hypersensitivity to other sulfonamide-derived medicines.
  • Pregnancy: Use is prohibited during the second and third trimesters of pregnancy. Use is generally not recommended in the first trimester, and the medicine must be discontinued immediately upon confirmed pregnancy.
  • Severe Organ Impairment: Patients with severe hepatic impairment, cholestasis, biliary obstructive disorders, anuria (not producing urine), or severe renal impairment (creatinine clearance le 30 ml/min).
  • Drug-Drug Contraindication: Patients with diabetes mellitus or renal impairment (GFR < 60 ml/min/1.73 m^2) who are concurrently taking aliskiren-containing products.
  • Electrolyte Imbalances: Patients with therapy-resistant hypokalaemia, hypercalcaemia, refractory hyponatraemia, or symptomatic hyperuricaemia/gout.

Age and Other Restrictions:

  • Pediatric Use: The combination is not recommended for use in children and adolescents (le 18 years of age) as safety and efficacy have not been established in this age group.
  • Lactation: The medicine is not recommended for use in breastfeeding mothers.
  • Special Consideration: Use is generally not recommended as initial therapy in patients with intravascular volume depletion, and caution is advised for those with mild to moderate hepatic impairment.

What should I know about interactions with other medicines?

Losartan potassium (Covance) has officially documented interaction patterns that are classified based on their potential pharmacokinetic (PK) and pharmacodynamic (PD) consequences, according to regulatory guidelines. These interactions define specific constraints for co-administration.

Documented Interaction Restrictions

Interacting Substance Official Regulatory Restriction
Aliskiren Contraindicated in patients with diabetes or moderate-to-severe renal impairment.
Potassium-sparing Diuretics Not recommended due to significant risk of hyperkalemia (high serum potassium).
Potassium Supplements Not recommended due to significant risk of hyperkalemia.

Metabolic and Exposure Effects

The drug’s metabolism involves the CYP2C9 and CYP3A4 enzymes. Co-administration with the CYP2C9 inhibitor Fluconazole is documented to cause a substantial increase (approximately 70%) in Losartan's plasma exposure, while the CYP inducer Rifampin significantly decreases the exposure of both Losartan and its active metabolite. Other agents like Cimetidine are also officially noted as increasing Losartan's plasma levels.

Pharmacodynamic and Other Interactions

Concomitant use with Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) may reduce the antihypertensive effect and increases the documented risk of renal function impairment. The label also states that co-administration with Lithium may lead to increased serum lithium concentrations. Furthermore, taking the tablet with a meal slows the rate of absorption, resulting in a lower peak concentration (Cmax) of Losartan.

Mechanism of Action

Covance is a combination pharmacologic agent containing losartan and hydrochlorothiazide. Losartan, a biphenyl-tetrazole derivative, functions as a selective competitive antagonist at the angiotensin II type 1 (AT1) receptors, which are primarily located on vascular smooth muscle, the heart, adrenal gland, and kidney. By blocking the binding of the endogenous ligand angiotensin II to the AT1 receptor, losartan prevents the Gq protein-coupled intracellular signaling pathway that mediates vasoconstriction and aldosterone secretion.

Hydrochlorothiazide, a thiazide-class diuretic, exerts its effect in the renal distal convoluted tubule. Its primary biological target is the apical sodium chloride cotransporter (Na^+-Cl^- cotransporter), which it inhibits. This inhibition reduces the reabsorption of NaCl into the systemic circulation, leading to increased NaCl and water excretion. The combination of these mechanisms results in two distinct system-level physiological consequences: decreased systemic vascular resistance via vasodilation and decreased circulating plasma volume via enhanced diuresis.

Dosage and Administration Information

How to Use Covance (Losartan Potassium and Hydrochlorothiazide)

This section outlines the instructions for using the medicine, detailing the steps for administration.

Administration Guidelines

Guideline Official Instruction
Route of Administration Oral
Dosage Schedule Typically started at 50 mg losartan / 12.5 mg hydrochlorothiazide (HCTZ) once daily. The maximum recommended dose is 100 mg losartan / 25 mg HCTZ once daily.
Timing (Meals) May be taken with or without food.
Preparation The tablet must be swallowed whole; no preparation (e.g., crushing, dissolving) is specified.
Missed Dose If a dose is missed, continue with the next scheduled dose at the usual time; do not take a double dose.

Special Procedural Requirements

Administration of this combination product is subject to specific constraints. The drug should not be used in pediatric patients (under 18 years of age). For adult patients, any fluid and/or sodium depletion should be corrected by a healthcare professional prior to initiating treatment to ensure safe use. Furthermore, the medicine is explicitly restricted and not recommended for use in patients who have severe renal impairment (creatinine clearance less than 30 mL/min) or severe hepatic impairment. The treatment is generally considered long-term, and doses are adjusted based on individual response after an initial period, such as three weeks, but must never exceed the stated maximum daily dose.

Recent Clinical Evidence

Research evidence / Overview of studies

Mechanism of Action

Research examined the drug's mechanism of action. Studies explored this approach to modulating inflammatory processes in conditions where COX-2 overexpression is observed.


Clinical Efficacy Trials

  • Chronic Pain Conditions: Research has evaluated patient outcomes in specific chronic pain conditions, including rheumatoid arthritis and osteoarthritis. These studies investigated whether patient-reported changes in pain and inflammation measures were noted.
  • Phase 3 Trial Data: A Phase 3 trial included evaluation of changes in disease activity over 52 weeks. The primary outcome measure focused on changes from baseline in the ACR20 response rate.
  • Acute Symptom Management: Another study included evaluation of patient-reported symptom changes during acute administration. Data collection utilized the Visual Analog Scale (VAS) score.

Combination Therapy Studies

Research examined the drug’s profile in specific combination use settings, and its potential role in relation to the duration of recovery. Studies have explored the drug's role in long-term management. Findings from combination studies remain limited.


Safety and Tolerability Profile

Research has examined the drug's profile in adults, focusing on outcomes across general populations and in specific subgroups (e.g., those with condition X).

  • Gastrointestinal Safety: Available evidence included studies that evaluated the incidence of specific GI events.
  • Cardiovascular Risks: Research explored outcomes related to cardiovascular status, with findings suggesting that data related to potential cardiovascular risks were collected in certain patient populations.

Frequently Asked Questions (FAQ)

Common questions about Covance (FAQ)

Q: What types of over-the-counter (OTC) medicines are known to interact with Covance?

Official product information advises caution when using this combination product with certain non-prescription items. Specifically, the label warns against concurrent use of Potassium supplements due to the risk of high potassium levels. Caution is also advised regarding Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), as they can potentially reduce the medication's effectiveness and increase the risk of kidney issues.

Q: Do any common foods, vitamins, or dietary supplements affect how Covance works?

Regulatory documents suggest certain dietary items can affect how the drug works. Patients are advised to avoid salt substitutes that contain potassium due to the risk of hyperkalemia. Caution is also advised regarding Grapefruit juice, as it may affect the concentration of the active drug in the body.

Q: What does research evidence say about the long-term outcomes of using Covance?

Studies have examined the long-term effects of Losartan-based treatment in specific patient groups. Findings from clinical trials indicated a significant reduction in the risk of stroke in specific hypertensive patients. Research also showed potential improvement in patient-reported quality of life scores over an extended period of use.

Q: Does Covance have an impact on a person's ability to drive or operate machinery?

Since this medication is known to lower blood pressure, official patient information explicitly states that it may cause side effects like dizziness, lightheadedness, or fainting. Official patient information includes a warning against driving or operating machinery until a person is aware of how the medication affects them.

Q: Is a generic version of the active ingredient in Covance currently available?

Yes, the active ingredients in Covance, Losartan potassium and Hydrochlorothiazide, are widely available as a generic drug. The brand-name version and its generic equivalent contain the same active ingredients. The availability of generic products is confirmed by regulatory and pharmaceutical information sources.

Q: What are the main reasons people have reported discontinuing use of Covance?

Official clinical trial data indicates that the medication is generally well-tolerated. However, discontinuation sometimes occurs due to adverse events, which include common side effects like dizziness, cough, or fatigue. The prescribing information documents these reasons from the trials.

Q: Does the medication have a protective coating or special release mechanism?

According to the official regulatory description, the medicine is typically a standard film-coated tablet designed for oral administration. Instructions require the tablet to be swallowed whole, and no special crushing or dissolving is specified, which is common for film-coated products.

Q: Is there a specific time of day Covance is generally advised to be taken?

The drug is typically prescribed to be taken once daily. To help prevent the diuretic component (HCTZ) from causing disruptive nighttime urination, it is often administered in the morning or at least four hours before bedtime.

Q: What is the description of the tablets or capsules of Covance (color, shape, markings)?

Regulatory agencies require manufacturers to precisely describe the appearance of the medication. The tablets for each specific strength have a unique and recognizable color, shape, and imprint code for patient safety and identification. This information is available in the official prescribing documentation.

Q: What are the key findings from the clinical trials for Covance?

Clinical trials demonstrated that the medication provides a dose-related reduction in blood pressure in patients with hypertension. Key findings also indicated significant benefits in reducing the risk of stroke for specific patient groups.

Q: How is Covance's efficacy described compared to a placebo in research?

Clinical trial data confirms that the drug combination produces a statistically significant reduction in blood pressure when compared to treatment with a placebo (an inactive substance). This comparison in research is necessary to confirm the medication's effectiveness.

Q: Is feeling tired after taking Covance normal?

Yes, according to official adverse reaction data, fatigue (tiredness) has been reported in clinical trials, particularly in certain patient groups like those with diabetic nephropathy. Dizziness is also listed as one of the most common reactions, which may contribute to a feeling of being tired.

Q: How long does it typically take to start feeling the expected effects of Covance?

The full expected benefit of the blood pressure lowering effect from the Losartan component is typically established within 3 to 6 weeks of starting treatment. The diuretic component (HCTZ) begins its effect much sooner, within approximately 2 hours of taking the dose.

Q: Does Covance primarily affect the central nervous system?

The drug’s primary action is on the circulatory and renal (kidney) systems to manage blood pressure. However, the official side effect profile does include common effects on the nervous system such as dizziness or headache.

Q: Is weight change, such as gain or loss, a noted side effect of Covance?

Official regulatory documents do not list significant weight change as a most common side effect. However, edema (swelling due to fluid retention) has been noted as a less common reaction in some studies, which may influence body weight.

Q: Can Covance interfere with or disrupt normal sleep patterns?

Sleepiness (referred to as somnolence) has been reported as a less common side effect in clinical trials of Losartan. This is documented in the official safety profile.

Q: Does consuming alcohol while taking Covance carry any specific warnings?

Official prescribing information advises that alcohol (ethanol) may have additive effects in lowering blood pressure when taken with this medication. This combination may increase the risk of temporary side effects like dizziness, lightheadedness, or fainting.

Q: Can herbal remedies or natural supplements cause an interaction with Covance?

The medication's breakdown in the body involves specific enzymes, and some herbal products could potentially affect the plasma concentration of Losartan. Regulatory sources warn that interactions are possible and should be considered.

Q: What is the official guidance for using Covance in older adults or seniors?

Official guidance indicates that no specific dosage recommendation for older adults is necessary solely based on age. However, these patients may be more sensitive to the effects of the medication, which may mean clinical adjustments are necessary.

Q: Are there official statements about the potential for dependency or addiction with Covance?

According to official regulatory agencies, the medication is not classified as a controlled substance. There are no specific warnings related to abuse or physical dependence included in the official prescribing information.

Q: What is the expected duration of effect after a single dose of Covance?

The duration of the blood pressure lowering effect generally persists for 24 hours, indicating the antihypertensive effect is sustained. The active component is cleared from the body with a half-life of 6 to 9 hours.

Q: What happens in studies if a patient stops taking Covance suddenly?

Studies have examined the effects of stopping Losartan abruptly. Official findings indicate that abrupt withdrawal is generally not associated with a rebound increase in blood pressure above the pre-treatment levels.

Q: How long does Covance stay in the body's system before it is fully eliminated?

The elimination time is determined by the half-lives of its components. Losartan's active metabolite has a half-life of 6 to 9 hours, meaning the drug is largely cleared from the body within approximately one to two days.

Q: Where is the official patient information leaflet (PIL) for Covance usually found?

The official patient information, known as the Patient Information Leaflet (PIL) or Medication Guide, is supplied with the dispensed medication. This information is also officially published by regulatory agencies such as the FDA and EMA.

Q: Are there reports that Covance may lose its effectiveness over time?

Official long-term clinical trials have specifically tracked this issue. Regulatory reports indicate that the phenomenon of tolerance (loss of effectiveness) to the blood pressure lowering effect has not been noted in these studies.

Q: Are there reports of Covance affecting vision or eye health?

Rare but serious side effects reported with the Hydrochlorothiazide (HCTZ) component include temporary sudden decrease in vision, acute eye pain, or seeing halos. These are potential signs of a condition called acute angle-closure glaucoma and are documented in the official safety information.

How should Covance be stored and disposed of?

The storage and disposal of Covance (Losartan potassium tablets) must adhere to official regulatory requirements to maintain product quality and safety.

Storage Component Official Requirement
Temperature Store at controlled room temperature, typically 20 C to 25 C (68 F to 77 F). Do not freeze.
Protection Keep the product protected from light and moisture by storing it in its original container.
Container The container must be kept tightly closed. Do not use the medicine after the labeled expiry date.
Child Safety Store the tablets strictly out of the sight and reach of children.

Disposal must follow local authority regulations for unused or expired medicine. The medication should not be discarded via household trash or flushed down the toilet.

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

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