Accupro

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Accupro

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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 Accupro

What is Accupro?

Accupro is a pharmaceutical medication containing the active ingredient quinapril. It belongs to a category of drugs known as angiotensin-converting enzyme (ACE) inhibitors. This medication is primarily used in the management of cardiovascular conditions, specifically hypertension and certain types of heart failure.

Mechanism of Action

To understand how Accupro works, it is helpful to understand the body's natural processes for regulating blood pressure. The body produces a substance called angiotensin II, which causes blood vessels to constrict (narrow) and stimulates the release of hormones that increase water and salt retention.

Quinapril, the active component in Accupro, functions by blocking the enzyme responsible for creating angiotensin II. By inhibiting this enzyme, the medication facilitates the following physiological responses:

  • Vasodilation: Blood vessels remain more relaxed and wider.
  • Reduced Pressure: With wider vessels, the heart does not need to pump as hard to move blood throughout the body.
  • Improved Blood Flow: Lower resistance in the vascular system helps improve the efficiency of the circulatory system.

Therapeutic Use in Hypertension

In individuals with hypertension (high blood pressure), Accupro is used to help maintain blood pressure within a more typical range. Persistent high blood pressure can place undue stress on the heart and arteries over time. By lowering the pressure against which the heart must pump, the medication helps reduce the long-term workload on the cardiovascular system.

Therapeutic Use in Heart Failure

Accupro is also utilized in the management of heart failure, a condition where the heart muscle is unable to pump blood as effectively as it should. In these cases, the medication is often used alongside other treatments to help improve cardiac output. By reducing the systemic resistance in the blood vessels, the heart can more easily circulate blood, which may help alleviate symptoms associated with impaired pumping function.

Regulatory References

  1. NICE Guideline on Hypertension in Adults

What side effects are possible with Accupro?

Official Adverse Reactions and Safety Profile

The safety profile for Accupro (quinapril) is structured according to official regulatory classifications, detailing the possible adverse reactions by frequency and physiological system. This information is derived from government-approved product labeling.

Frequency Classification of Adverse Reactions

Adverse reactions are formally categorized based on their documented incidence rates:

  • Common (1% to 10%): Dizziness, Headache, Cough, Pharyngitis, Dyspnea (shortness of breath), Nausea, Vomiting, Diarrhea, Abdominal pain, and increases in laboratory values such as serum creatinine and blood urea nitrogen (BUN).
  • Uncommon (0.1% to 1%): Hypotension (low blood pressure), Palpitations, Syncope (fainting), Insomnia, Depression, Rash, Pruritus (itching), and Myalgia (muscle pain).

Serious Adverse Reactions

Regulatory documents explicitly highlight certain rare but clinically significant adverse events:

Angioedema, a rapid swelling of the face, extremities, lips, tongue, glottis, and larynx, is a documented serious risk. Other serious reactions include Intestinal Angioedema, Acute Renal Failure, and in extremely rare instances, Hepatic Failure. Exposure during the second and third trimesters of pregnancy is associated with a risk of fetal and neonatal injury and death.

Population and Exposure Safety Notes

Safety notes specify patterns related to exposure and patient status. Hypotension is noted as being more likely to occur at the start of therapy or during dose increases. The characteristic cough is typically persistent but generally resolves after treatment is discontinued. Patients with pre-existing renal impairment or those who are salt- or volume-depleted are at higher risk for certain adverse effects, such as symptomatic hypotension and increases in BUN/creatinine.


Safety-Related Restrictions: Official labeling includes restrictions against the simultaneous use of quinapril with other agents that block the Renin-Angiotensin-Aldosterone System (RAAS), such as Angiotensin II Receptor Blockers (ARBs), due to a documented increased risk of hypotension, hyperkalemia, and decreased renal function.

Overdose and Emergency Response

Official Overdose Manifestations

The official regulatory profile for Accupro overdose establishes that the most likely clinical manifestation is the development of symptoms related to severe hypotension (extremely low blood pressure). This physiological effect is the core concern, as sustained, profound hypotension carries the potential for serious clinical consequences, including the risk of shock or circulatory collapse.

Mandated Emergency Actions

Urgent medical attention is required for any known or suspected over-ingestion. Regulatory guidance explicitly mandates immediate contact with emergency medical services or a regional poison control centre. This action is critical, as the situation may necessitate close observation and supportive intervention in a hospital setting.

Treatment and Supportive Measures

In the event of an overdose, no specific antidote is known. Management is therefore defined as symptomatic and supportive. The documented procedure for counteracting severe hypotension involves the administration of intravenous volume expansion, such as an infusion of 0.9% sodium chloride solution. Official documents also clarify that both hemodialysis and peritoneal dialysis have been found to have little effect on the elimination of the active drug components, and laboratory determinations of drug serum levels have no established role in acute overdose management.

Therapeutic Uses of Accupro

What Accupro Treats: Main Uses and Benefits

Accupro is utilized as part of symptomatic management across relevant therapeutic domains. The medication is generally used for the chronic, long-term management of high blood pressure (essential hypertension) and is considered relevant as adjunctive treatment for symptomatic chronic heart failure.

Primary Therapeutic Benefits

This use is considered relevant for easing symptoms related to systemic imbalance and is applied in contexts marked by increased discomfort or tension. In heart failure, this domain covers symptoms that interfere with daily functioning, such as breathlessness and physical fatigue that generally limit routine activity. The key benefit is providing support that helps ease the overall symptom burden, assisting with maintaining functional stability. Its application is common in clinical settings that involve acute or unstable symptom patterns, such as in high-risk patient groups.

“This medication is commonly used to help patients cope more steadily with symptom fluctuations associated with chronic cardiovascular issues.”


Quick Fact: Support for Systemic Imbalance

The medicine may assist with maintaining functional stability and supports general well-being during symptomatic phases related to chronic conditions like high blood pressure and cardiac dysfunction.

Regulatory References

  1. DailyMed product label overview

Eligibility and Restrictions for Use

Accupro use is defined by specific regulatory criteria regarding a patient's medical history, age, organ function, and current health status. It is primarily established for use in adults with hypertension and heart failure. Older adults are eligible, though physicians often monitor renal function closely.

Contraindicated Populations

Use is strictly prohibited in patients with a history of angioedema related to any previous ACE inhibitor or those with hereditary angioedema. Accupro is also contraindicated in patients who have taken a sacubitril-containing medicine within the last 36 hours. It must not be used by patients in the second or third trimesters of pregnancy.

Restricted and Non-Established Use

Population Group Eligibility Status
Pediatric Patients Safety and efficacy have not been established. Use is not recommended.
Renal or Hepatic Impairment Requires conditional use and specialized monitoring due to altered drug elimination.
Pregnancy (1st Trimester) Not recommended.

Eligibility also requires caution in volume-depleted patients and those with collagen vascular disease.

What should I know about interactions with other medicines?

Accupro Interactions with other medicines and products

Official regulatory information for Accupro (Quinapril) establishes several major constraints based on pharmacodynamic and pharmacokinetic patterns.

Formal Contraindicated Combinations

Co-administration with Sacubitril/Valsartan (a Neprilysin Inhibitor) is contraindicated and requires a mandatory 36-hour separation period due to the significantly increased risk of angioedema. The combination with Aliskiren is contraindicated in patients with diabetes mellitus or moderate to severe renal impairment. Additionally, Accupro is contraindicated for use during hemodialysis utilizing High-Flux Polyacrylonitrile ('AN69') Membranes due to the risk of severe anaphylactoid reactions.

Clinically Significant Interactions

Interaction with Potassium-Sparing Diuretics and Potassium Supplements may result in elevated serum potassium levels, known as hyperkalemia. Co-administration with Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) may cause deterioration of renal function, an interaction particularly relevant for the elderly or volume-depleted individuals. Regulatory labeling also documents that Lithium levels may be increased, leading to potential toxicity. Furthermore, the magnesium content in Accupro tablets reduces the absorption of co-administered Tetracycline.

Mechanism of Action

Accupro (quinapril) functions as a prodrug which undergoes enzymatic hydrolysis in the liver to yield its principal active metabolite, quinaprilat.

Quinaprilat acts as a non-sulfhydryl competitive inhibitor of the Angiotensin-Converting Enzyme (ACE), a peptidyl dipeptidase also known as kininase II, found in both circulating and tissue compartments. The primary biological targets are ACE molecules, particularly those bound to the vascular endothelium and within the kidney.

ACE inhibition blocks the molecular conversion of the inactive peptide angiotensin I to the potent vasoconstrictor and proliferative agent angiotensin II. This action reduces the circulating and tissue concentration of angiotensin II. Concurrently, inhibition of ACE/kininase II impedes the breakdown of the vasodilator peptide bradykinin, resulting in its relative accumulation.

The downstream cascade is a net decrease in systemic angiotensin II-mediated signaling, leading to reduced vasoconstriction and diminished aldosterone secretion from the adrenal cortex. Aldosterone reduction promotes natriuresis and decreased fluid reabsorption. The increased bradykinin levels further contribute to vasodilation. The system-level physiological consequence is a reduction in total peripheral vascular resistance.

Dosage and Administration Information

How to Use Accupro

Accupro is an oral medication administered as a film-coated tablet, available in strengths of 5 mg, 10 mg, 20 mg, and 40 mg. The tablets are swallowed whole with water, and they can be taken with or without food.

Condition Starting Dose Maintenance Range Frequency
Hypertension 10 mg or 20 mg once daily 20 mg to 80 mg total daily Once or twice daily
Heart Failure 5 mg twice daily 20 mg to 40 mg total daily Twice daily

Treatment is intended for chronic, long-term administration. Dosing is adjusted systematically: titration intervals are generally at least two weeks for hypertension and weekly intervals for heart failure, based on the individual's response. The maximum daily dose for hypertension is 80 mg.

Special Administration Rules

Dose adjustments are utilized for certain populations. The initial dose for older adults (65 years and older) with hypertension is 10 mg once daily. For patients with renal impairment, the initial dose is reduced; for instance, 5 mg or 2.5 mg daily may be used depending on the degree of creatinine clearance.

If a dose is missed, it should be taken promptly unless it is close to the time for the next scheduled dose, in which case the missed dose is skipped; doses must not be doubled. The first dose administered to patients who are volume-depleted or are starting treatment for heart failure is conducted under medical supervision for several hours until blood pressure stabilizes.

Recent Clinical Evidence

Research evidence / Overview of studies for Accupro


Evidence for Use in Essential Hypertension (High Blood Pressure)

Research examining quinapril for essential high blood pressure primarily involved Randomized Controlled Trials (RCTs). The research was structured to determine how blood pressure changes when quinapril was evaluated alone, or monotherapy, and when it was observed alongside other medicines. The primary measures assessed included changes in Systolic and Diastolic Blood Pressure (BP), and the documented rates at which patients reached specific blood pressure targets.

The trials reported measurements of changes in both systolic and diastolic BP that were observed within the first one to two weeks of beginning treatment. A key observation documented in the research is a less pronounced blood pressure response in Black hypertensive patient cohorts compared to White cohorts. Although the evidence base for hypertension is supported by numerous trials, long-term outcomes are not fully established regarding the reduction of major cardiovascular events over many decades of use.


Evidence for Use as Adjunctive Treatment in Chronic Heart Failure

Clinical evaluation of quinapril as a supportive therapy for Chronic Heart Failure has relied on double-blind, randomized, placebo-controlled trials. Researchers was studied for outcomes related to functional status and symptomatic changes in patients who were already receiving standard treatments like diuretics. The trials research examined measures of exercise tolerance and how symptoms like fatigue and breathlessness were observed to evolve.

What remains uncertain about this area of research relates to the very long-term prognosis. Specifically, long-term effects are not fully established concerning the influence of quinapril on overall survival or mortality in heart failure populations, as this was not the primary focus of the core regulatory trials. The research findings also primarily results apply only to the populations studied, which were those with mild to moderate heart failure, meaning data for certain groups with more severe heart failure presentations remain insufficient.


Key Evidence Gaps and Remaining Research Uncertainty

The research contributes to the broader evidence landscape for understanding quinapril, but evidence highlights what is known—and what is still uncertain. Key limitations include the fact that long-term effects are not fully established concerning overall survival in heart failure patients. Additionally, the comparative evidence is lacking for many potential long-term benefits in patients with established coronary artery disease, where findings were mixed across different study designs. Overall, the research does not determine whether an individual will respond similarly to the group patterns observed in the studies.

Key Studies & References

  1. Quinapril: a further update of its pharmacology and therapeutic use in cardiovascular disorders

Frequently Asked Questions (FAQ)

Common questions about Accupro (FAQ)

Q: Can Accupro be taken with pain relievers like ibuprofen?

Official information warns that taking Accupro alongside a class of pain relievers called NSAIDs (Non-Steroidal Anti-Inflammatory Drugs), which includes ibuprofen, may be associated with a risk of deterioration of kidney function. This interaction is noted as particularly relevant for older adults or those who have existing volume depletion.

Q: Can using salt substitutes affect me while taking Accupro?

Regulatory documents indicate that Accupro can cause an increase in your body’s potassium levels. Because many salt substitutes contain potassium, using them may increase the risk of high serum potassium, a condition known as hyperkalemia.

Q: Is Accupro safe for people with liver problems?

Regulatory labeling indicates that close monitoring or caution may be necessary when quinapril is used in patients who have impaired liver function or progressive liver disease, as the drug's metabolism depends on the liver. Hepatic failure (severe liver failure) is noted in regulatory documents as a rare, serious adverse event.

Q: Are there any foods I should avoid when taking this medication?

Official product information states that you can generally take Accupro with or without food. However, prescribing information indicates that the rate and extent of the drug's absorption are diminished moderately when it is administered with a high-fat meal.

Q: Can Accupro cause dizziness or lightheadedness?

Yes, dizziness is listed in official documents as a Common side effect. Feelings of lightheadedness and fainting (syncope) may also occur, particularly when rising quickly from a sitting or lying position.

Q: Is it safe for older adults (seniors) to take Accupro?

Use in this age group is established, but regulatory documents note that specialized dosing and close monitoring of kidney function may be necessary. For hypertension, a lower initial dose is recommended for older adults (65 years and older).

Q: What should I do if I feel tired after starting Accupro?

While official documents list feelings of fatigue and tiredness as Common side effects of the medication, this information is descriptive and not instructional regarding a course of action.

Q: Is it common for Accupro to cause headaches?

Yes, headache is listed in official regulatory documents as a Common adverse reaction. This means it was observed in 1% to 10% of patients during clinical trials.

Q: Are there any non-heart-related conditions Accupro is used for?

Accupro is approved for specific cardiovascular conditions: the treatment of essential hypertension (high blood pressure) and as supportive therapy for chronic heart failure. Regulatory labels do not list other primary uses.

Q: What is the usual duration of the therapeutic effect of Accupro?

Official information indicates that the drug's effect on blood pressure regulation is sustained. Studies confirm that substantial effects on blood pressure regulators last for approximately 24 hours.

Q: Does Accupro have a generic version available?

The generic name for the active ingredient in Accupro is quinapril hydrochloride.

Q: Is it normal to have mild stomach upset when first starting Accupro?

Official labeling lists gastrointestinal issues like nausea, vomiting, diarrhea, and abdominal pain as Common adverse reactions. Mild side effects are generally noted as possibly resolving within a few days or a couple of weeks after starting therapy.

Q: What is the role of Accupro in managing post-heart attack conditions?

Accupro is approved as adjunctive therapy for chronic heart failure. This is often managed following cardiovascular events, and studies supporting the drug's use examined outcomes related to functional status and symptomatic changes in patients.

Q: Why do some people need two different blood pressure medications, including Accupro?

Regulatory documents indicate that Accupro is approved for use as a single treatment (monotherapy) or given concomitantly (at the same time) with other treatments, such as diuretics (water pills), to manage hypertension or heart failure.

Q: What is the potential for an interaction between Accupro and lithium?

Official labeling documents a clinically significant interaction: co-administration with Lithium may result in increased levels of lithium in the blood. This increase carries a risk of potential toxicity.

Q: Is it okay to drive or operate machinery while taking Accupro?

Official warnings note the potential for the medication to affect the ability to drive or operate machinery safely. This is especially important when you first start taking the drug or when the dose is changed, due to the potential for dizziness or weariness.

Q: Are there any restrictions on alcohol consumption with Accupro?

Official drug interaction information indicates that the use of quinapril with alcohol may have additive effects in lowering blood pressure. This could lead to symptoms such as dizziness, lightheadedness, or fainting.

Q: What is the maximum time I can go without taking Accupro?

Official information on the drug’s persistence notes that the active component, quinaprilat, has a prolonged terminal phase half-life of about 25 hours. This indicates how long the drug remains in the system.

Q: What are the common side effects that usually go away after a few weeks?

Official information notes that some of the more common side effects, such as dizziness or fatigue, may be mild and are noted as possibly resolving within a few days or a couple of weeks after starting the drug.

How should Accupro be stored and disposed of?

How to Store and Dispose of Accupro

Accupro (quinapril hydrochloride) tablets must be stored at controlled room temperature, maintaining a range of 20^circ to 25 C (68^circ to 77 F). The medication must be kept in its tightly closed, original container to ensure protection from light and excess moisture, and it is required to be kept from freezing.

Constraint Requirement
Temperature Controlled Room Temperature (20^circ to 25 C)
Protection Keep from freezing, light, and excess moisture
Child Safety Store out of the sight and reach of children

Unused or expired Accupro should not be flushed down the toilet. Disposal must follow official guidelines, which recommend utilizing a drug take-back program or following the FDA's instructions for mixing the product with an unappealing substance before disposal in the household trash.

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

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