Co Anginet

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Co Anginet

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 Co Anginet

Property Description
Active Ingredients Valsartan, Hydrochlorothiazide
Form Film-coated tablet
Pharmacological Class Angiotensin II Receptor Antagonist (ARB) and Thiazide Diuretic Combination
Common Use Management of essential hypertension (high blood pressure)
Origin Synthetic

What is Co Anginet and How is it Classified?

Co Anginet is a prescription-only medicine formulated as a fixed-dose combination product for the long-term management of high blood pressure, medically termed essential hypertension, in adults. It is classified as an Angiotensin II Receptor Antagonist (ARB) and Diuretic combination, a pharmacological approach often employed when blood pressure is not adequately managed by therapy with a single agent alone. This synthetic preparation provides a structured, simultaneous approach to cardiovascular control.


Composition and Physical Form

The medication incorporates two distinct synthetic active ingredients in a single film-coated tablet for oral administration: Valsartan and Hydrochlorothiazide. Valsartan functions as the Angiotensin II Receptor Blocker component, while Hydrochlorothiazide is the Thiazide Diuretic component, a type of "water pill" derived from sulphamide derivatives. The combination of these two established drug classes is clinically recognized for providing a comprehensive blood pressure-lowering effect. Popular brands sharing this essential formulation include CoDiovan and Diovan HCT.


The General Purpose of this Dual-Action Treatment

The general purpose of Co Anginet is to achieve a substantial and sustained reduction of blood pressure by engaging two complementary mechanisms: blood vessel relaxation (via Valsartan) and fluid reduction (via Hydrochlorothiazide). This dual-action approach is highly effective and essential for minimizing the long-term cardiovascular risks associated with chronic uncontrolled hypertension. This combination is indicated for adult patients whose blood pressure is inadequately controlled by monotherapy, as it serves as an important step in antihypertensive therapy.

What side effects are possible with Co Anginet?

Possible side effects and safety information

Official regulatory documents classify adverse reactions to the valsartan/hydrochlorothiazide combination into frequency tiers and System-Organ-Classes (SOC).

Documented Adverse Reactions and Frequency

The most frequently reported adverse reactions are classified as Common (occurring in 1/100 to <1/10 patients). These include dizziness, headache, nasopharyngitis (cold symptoms), and fatigue. Reactions affecting the Nervous System, Infections, Musculoskeletal, and Gastrointestinal systems are formally listed in regulatory safety documentation.

Serious Safety Considerations

The label documents several serious adverse reactions, often reported post-marketing. These include Angioedema (severe swelling of the face, tongue, or throat) and, specific to the hydrochlorothiazide component, the risk of Acute Myopia and Secondary Angle-Closure Glaucoma. The risk of Non-melanoma Skin Cancer is officially associated with the long-term, cumulative exposure to the hydrochlorothiazide component.

Population-Specific Safety Constraints

The medication is Contraindicated in Pregnancy due to the high risk of fetal toxicity. It is also contraindicated in patients with Anuria (inability to urinate), Severe Renal Impairment, and Severe Hepatic Impairment. Safety monitoring notes require the periodic assessment of serum electrolytes and the correction of volume depletion prior to administration to mitigate the risk of severe hypotension.

Overdose and Emergency Response

An overdose of Co Anginet (Valsartan/Hydrochlorothiazide) is primarily characterized by the effects of the active ingredients on the body's fluid balance and blood pressure. The most significant manifestation is severe hypotension (excessively low blood pressure), which may lead to clinical signs such as dizziness, fainting, lightheadedness, and changes in heart rhythm like tachycardia or bradycardia.

A critical outcome is profound fluid and electrolyte depletion due to the diuretic component. Regulatory documents note that this can result in severe laboratory abnormalities including hyponatremia, hypokalemia, and hypochloremic alkalosis, which may consequently lead to acute renal failure or dangerous arrhythmias.

Immediate medical attention must be sought in the event of a suspected overdose; the patient should call their doctor, a Poison Control Center, or go to the nearest emergency room. No specific antidote is known for this combination therapy. Treatment is officially designated as symptomatic and supportive. If excessive hypotension occurs, the official guidance requires placing the patient in the supine position and managing the condition with an intravenous infusion of normal saline to restore volume. Continuous hospital monitoring of serum electrolytes and renal function is necessary due to the severe metabolic risks. The label also notes the risk of fetal and neonatal morbidity from in utero exposure.

Therapeutic Uses of Co Anginet

What Co Anginet Treats: Main Uses and Benefits

Co Anginet is commonly used to help manage essential hypertension (chronic high blood pressure) in adults in situations where their pressure remains inadequately controlled using a single blood pressure medication (monotherapy). The combination is also considered relevant as initial therapy for patients who may require multiple drugs to achieve their therapeutic goals.


The therapeutic benefit is centered on achieving a sustained reduction in persistently elevated systolic and diastolic pressure readings. This combination therapy is generally relevant for patients whose condition may benefit from dual pharmacological support. The clinical situations where Co Anginet is commonly used include essential hypertension, uncontrolled blood pressure, and contexts where supportive management of long-term risk is needed.

The core therapeutic approach contributes to easing the overall burden associated with cardiovascular risk. The medication supports the management of this chronic condition, which may assist with maintaining functional stability against the progressive effects of the condition.

Quick Fact: Relief for Systemic Imbalance

Co Anginet is used for managing symptoms related to systemic imbalance (high blood pressure) which is applied across domains where additional symptomatic support is needed.

Regulatory References

  1. DailyMed Label for Valsartan and Hydrochlorothiazide

Eligibility and Restrictions for Use

Official Regulatory Eligibility for Co Anginet

Co Anginet (Valsartan/Hydrochlorothiazide) is approved for use in Adults but is prohibited or not recommended in several specific patient populations, as defined by regulatory bodies.

Classification Eligibility Rule (Based on Official Labeling)
Contraindicated Use is strictly forbidden for women in the second and third trimesters of pregnancy; patients with severe hepatic impairment, biliary cirrhosis, or cholestasis; and patients with severe renal impairment (GFR < 30 mL/min) or anuria. Also contraindicated in cases of known hypersensitivity to the active substances or any sulfonamide-derived medicines, and in patients with refractory electrolyte imbalances (e.g., severe hypokalaemia, hypercalcaemia).
Not Recommended The medication is not recommended for use in children and adolescents below the age of 18 due to insufficient data on safety and efficacy. It is also not recommended for women who are breastfeeding.
Restricted Use Use requires special caution and limitations in patients with mild to moderate hepatic impairment (maximum valsartan dose should not exceed 80 mg); patients with certain valve disorders (aortic or mitral stenosis); and patients with renal artery stenosis.

The regulatory profile clearly establishes eligibility by imposing absolute contraindications based on severe organ dysfunction and pregnancy status. For populations where data is lacking, such as pediatrics, treatment is not recommended, while others require close monitoring and dose restrictions.

What should I know about interactions with other medicines?

Co Anginet Interactions with other medicines and products

The official regulatory profile for Co Anginet (Valsartan/Hydrochlorothiazide) details specific interaction patterns concerning its dual components, classified by their mechanisms and resulting regulatory constraints.

Formal Contraindications and Restrictions

Co-administration with Aliskiren-containing medicines is formally contraindicated in patients with diabetes mellitus or moderate to severe renal impairment due to dual blockade of the Renin-Angiotensin System. Additionally, use is not recommended with substances that increase serum potassium, including potassium-sparing diuretics, potassium supplements, or salt substitutes containing potassium, given the documented risk of hyperkalemia.

Exposure and Pharmacodynamic Effects

Co-administration with Lithium increases the risk of lithium toxicity as the diuretic component can reduce its renal clearance. Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) may both reduce the intended blood pressure-lowering effect and pose an increased risk of renal impairment. The Valsartan component is affected by the hepatic uptake transporter OATP1B1, meaning OATP1B1 inhibitors may increase Valsartan systemic exposure.

Administration Timing Requirements

To prevent reduced absorption of the Hydrochlorothiazide component, the bile acid sequestrants Cholestyramine or Colestipol must be administered with a separation of at least 4 hours before or 4 hours after the administration of Co Anginet.

Mechanism of Action

Modulating Vascular Tone and Resistance

One component of Co Anginet functions as a selective antagonist (blocker) on the Angiotensin II type 1 ( AT1) receptors . This interaction prevents the vasoconstrictive hormone Angiotensin II from binding to receptors on blood vessel walls. The resulting inhibition of smooth muscle contraction produces vessel relaxation and decreased systemic vascular resistance.


Regulating Renal Fluid and Salt Balance

The second component engages mechanisms that influence renal excretory pathways by inhibiting the sodium-chloride co-transporter ( NCC) enzyme in the kidney tubules. This action modifies the early molecular steps of salt reabsorption, leading to an increased excretion of sodium and water. This produces the physiological adjustment of reduced total body fluid volume and plasma volume.


Dual-System Mechanistic Synergy

This drug is designed to simultaneously modulate both the hormonal signaling pathways that control vessel constriction and the renal pathways that control volume status. This combined, multi-system approach engages mechanisms where targeted pathway adjustment is required, resulting in a synergistic physiological effect of reduced pressure within the circulatory system.

Dosage and Administration Information

Co Anginet is administered exclusively by the oral route as a fixed-dose film-coated tablet containing a combination of Valsartan and Hydrochlorothiazide. The medicine is designed for a once-daily frequency pattern, which supports the long-term administration required for chronic conditions. The tablet may be administered with or without food, providing flexibility in the scheduling of the daily intake.

Standard adult dosing typically begins with a strength of 160 mg Valsartan and 12.5 mg Hydrochlorothiazide once daily, used either as initial therapy or as a necessary progression from single-agent treatment. The dosage should be titrated based on the clinical scenario, but the maximum labeled daily dose for this combination is 320 mg Valsartan and 25 mg Hydrochlorothiazide.

Dosage adjustments follow a specific schedule. A full effect following a dose change must be assessed over a period of two to four weeks before any further upward titration is considered. This pattern ensures the appropriate interval for achieving a stable usage state.

Specific procedural conditions apply to the initiation of treatment. Any underlying volume or salt depletion must be corrected before starting the medicine. Furthermore, this combination is typically not used in patient populations diagnosed with severe renal impairment, defined as a creatinine clearance of 30 mL/min or less. If a dose is missed, the recommended approach is to take it as soon as it is remembered unless it is near the time of the next scheduled dose, in which case the missed dose should be omitted, and the regular schedule resumed.

Recent Clinical Evidence

Co Anginet: Recent Clinical Evidence

Co Anginet is a fixed-dose combination medication typically containing Valsartan (an angiotensin II receptor blocker, or ARB) and Hydrochlorothiazide (HCTZ, a thiazide diuretic). It is primarily indicated for the treatment of essential hypertension (high blood pressure) in adults whose blood pressure is not adequately controlled with either component alone.

Efficacy and Combination Therapy

Clinical trials have investigated the use of this combination compared to the individual components (monotherapy). Studies have shown that the combination of an ARB like valsartan and a thiazide diuretic like HCTZ significantly improves blood pressure reduction compared to the ARB alone. The rationale for this fixed-dose combination lies in the synergistic effect of the two mechanisms, which often allows a greater percentage of patients to reach their target blood pressure goals.

Component Mechanism of Action Role in Combination
Valsartan Blocks the action of angiotensin II, relaxing blood vessels. Reduces vasoconstriction and aldosterone release.
Hydrochlorothiazide Acts as a diuretic, helping the kidneys remove excess salt and water. Reduces fluid volume and peripheral vascular resistance.

Safety Profile and Considerations

Overall, the safety profile of the valsartan/HCTZ combination is generally comparable to that of valsartan alone. However, the presence of HCTZ introduces specific considerations. The diuretic component can be associated with electrolyte imbalances such as hypokalemia (low potassium), which requires monitoring. Conversely, the ARB component may help attenuate some of the diuretic-induced potassium loss.

Research emphasizes the importance of monitoring renal function and serum electrolytes closely, particularly when initiating therapy or in patients with pre-existing kidney impairment or conditions like severe heart failure.

Frequently Asked Questions (FAQ)

Common questions about Co Anginet (FAQ)

Q: How quickly should I expect Co Anginet to start working?

Studies show that the initial blood pressure reduction typically begins about two hours after taking a dose. The maximum pressure-lowering effect usually occurs within about six hours. However, official guidelines indicate it takes approximately four weeks for the full, stable effect of any dose change to be achieved.

Q: Is it normal to feel a bit dizzy after starting Co Anginet?

Yes, regulatory documents indicate that dizziness is a common adverse reaction reported by patients in clinical trials. Product information notes that dizziness can affect the ability to drive or operate machinery, as is typical with drugs that cause this side effect.

Q: Do I need to avoid any specific foods or drinks while taking Co Anginet?

Official warnings state that consuming alcohol may have an additive effect with the medicine in lowering blood pressure, which can increase the risk of dizziness or fainting. Additionally, you should avoid potassium-containing salt substitutes or supplements, as this medication may increase your potassium levels.

Q: Can Co Anginet interact with common over-the-counter pain relievers?

Yes, regulatory information states that Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), which include some common pain relievers, can interact with Co Anginet. This interaction may both reduce the intended blood pressure-lowering effect and increase the risk of kidney-related issues.

Q: Are there any herbal supplements that could negatively interact with Co Anginet?

Official warnings specifically caution against taking potassium supplements. Patients are generally advised to inform their healthcare professional about all vitamins, supplements, and herbs they are taking to check for potential conflicts, as the label cannot list every possible interaction.

Q: Is Co Anginet safe for people with kidney problems?

The medication is contraindicated, meaning strictly forbidden, in people with severe renal impairment (severe kidney problems). In cases of less severe kidney conditions, close monitoring of kidney function may be necessary, as these conditions could potentially worsen.

Q: What precautions should be taken when using Co Anginet in the elderly?

Regulatory documents indicate that this medication has not shown geriatric-specific problems that would prevent its use in the elderly. However, since older adults often experience a natural decline in kidney function, this consideration is generally important when healthcare providers determine the appropriate usage.

Q: Why is Co Anginet sometimes prescribed with other heart medicines?

The official indication for this drug is for adult patients whose blood pressure is not adequately controlled by a single agent. To achieve target blood pressure goals, the medicine may be administered in combination with other antihypertensive agents as part of a comprehensive treatment plan.

Q: Can Co Anginet cause trouble sleeping?

Yes, official safety information reports that insomnia, or trouble sleeping, is an adverse reaction that has been noted in clinical trials of this combination medicine.

Q: Does Co Anginet make you tired during the day?

Regulatory information lists fatigue (tiredness) and asthenia (lack of energy or weakness) as reported adverse reactions. These effects can be experienced at any time of day.

Q: Can Co Anginet affect my blood sugar levels?

Official warnings state that the diuretic component (Hydrochlorothiazide) may affect glucose tolerance, which means it could potentially raise blood sugar (glucose) levels. Official information notes that if a patient has diabetes, a healthcare provider may need to consider how this medicine impacts their overall glucose management.

Q: Do I need regular blood tests while on Co Anginet?

Official product labeling specifies the need for periodic monitoring of certain values, such as serum electrolytes (like potassium) and renal function, particularly when a patient starts taking the medication.

Q: Is Co Anginet available in different strengths?

Yes. According to official drug labels, the tablets are available in multiple combination strengths of Valsartan and Hydrochlorothiazide to allow healthcare providers to select the appropriate usage.

Q: What happens if I accidentally take two doses of Co Anginet close together?

Official patient instructions are clear on managing missed doses. The instructions for a missed dose scenario indicate that a dose should not be doubled. In situations of accidental overdose, contacting emergency services is standard advice.

Q: Is it okay to drive while taking Co Anginet?

Because the medication can cause side effects like dizziness or fatigue, official product information advises caution about operating machinery, as the medicine may affect your ability to drive.

Q: Can women who are planning pregnancy take Co Anginet?

Official warnings strongly advise that this medication is discontinued as soon as possible if pregnancy occurs due to the high risk of fetal harm. For women of childbearing age, the use of adequate contraception is often discussed with healthcare providers.

Q: What are the signs of a severe allergic reaction to Co Anginet?

Official warnings document serious adverse reactions such as angioedema, which is a severe swelling of the face, lips, tongue, or throat. Anaphylaxis (a sudden, severe allergic reaction) is also listed in post-marketing reports.

Q: What's the difference between a generic version and brand name Co Anginet?

Generic versions containing the active ingredients valsartan and hydrochlorothiazide are available. These generic products are required by regulators to contain the same active ingredients as the brand name and meet the same quality and strength standards.

Q: Is it common for Co Anginet to cause stomach upset?

Gastrointestinal issues such as nausea, diarrhea, and dyspepsia (indigestion) have been reported in clinical trials, although they are generally considered mild and transient.

Q: Are there long-term side effects associated with Co Anginet use?

Official warnings state that Non-melanoma skin cancer is associated with the long-term, cumulative exposure to the hydrochlorothiazide component (the diuretic). Due to this risk, patients on long-term therapy are often advised about the importance of regular skin checks.

Q: Can people with certain eye conditions safely take Co Anginet?

The product information includes a warning about the risk of a rare reaction called Acute Myopia and Secondary Angle-Closure Glaucoma linked to the diuretic component. Patients who experience sudden blurred vision or eye pain should seek immediate medical attention.

How should Co Anginet be stored and disposed of?

Storage and Disposal Requirements for Co-Anginet

Co-Anginet tablets must be stored at controlled room temperature, typically defined as 20 C to 25 C, and should not be stored above 30 C [HPRA SmPC]. The medication must be kept from freezing and should be stored away from excess heat and moisture [MedlinePlus].

For product integrity, the tablets must remain in the original container, which should be kept tightly closed [MedlinePlus]. Storage must be out of the sight and reach of children and the product must not be used after the expiry date printed on the packaging [HPRA SmPC].

Disposal of unused or expired tablets must be done in accordance with local regulations and should not be thrown away via wastewater or household waste to protect the environment [HPRA SmPC].

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

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