Altace

Quick links to important sections

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 Altace

Quick Facts

Property Description
Active ingredient Ramipril
Form Capsules (Oral)
Pharmacological class Angiotensin-Converting Enzyme (ACE) Inhibitor
General purpose Management of high blood pressure
Origin Synthetic chemical derivative

What Type of Medicine is Altace (Ramipril)?

Altace is a long-established, prescription-only brand name for the synthetic medication containing the active ingredient Ramipril, which is classified primarily as an Antihypertensive Agent. The drug belongs specifically to the Angiotensin-Converting Enzyme (ACE) Inhibitor pharmacological class. Ramipril's clinical profile is supported by extensive pharmacological studies that have validated its efficacy in managing conditions requiring circulatory support. This classification defines its central role as a dedicated single-ingredient product used for long-term therapy, representing a cornerstone agent in protocols for achieving sustained blood pressure control.

Composition and Pharmaceutical Form of Ramipril

The active ingredient in Altace is Ramipril, a synthetic compound that functions as a prodrug. This means the molecule itself is largely inactive when taken orally and must be chemically converted by the liver into its potent, active metabolite, Ramiprilat, to exert its effect. The reliance on this conversion to Ramiprilat is a recognized pharmacological feature of this specific molecule. Altace is predominantly supplied as hard gelatin capsules in various strengths, which is its most recognized pharmaceutical preparation for the oral route of administration.

General Purpose: How Altace Supports Cardiovascular Health

The fundamental purpose of Altace is to help reduce and manage high blood pressure by promoting vasodilation (widening of the blood vessels) in the circulatory system. This is achieved through the inhibition of the ACE enzyme, which subsequently suppresses the formation of the powerful vasoconstricting hormone Angiotensin II. By reducing the constrictive tension on blood vessels and decreasing total peripheral resistance, the medicine effectively lowers blood pressure, easing the continuous workload placed upon the heart and supporting long-term cardiovascular health.

Regulatory References

  1. Ramipril - StatPearls - NCBI Bookshelf
  2. Ramipril: MedlinePlus Drug Information
  3. Ramipril Label - DailyMed (FDA/NLM)

What side effects are possible with Altace?

Possible Side Effects and Safety Information

The safety profile of Altace (Ramipril) is classified by regulatory authorities based on the frequency and type of adverse reactions observed in clinical use. These documented effects are categorized by the physiological systems involved, providing a structured understanding of the medicine’s risk profile.

Adverse reactions are grouped by frequency. Common effects typically listed in official documents include a dry, persistent cough, headache, dizziness, and fatigue. Effects classified as Uncommon may include symptoms such as nausea, vomiting, mood alterations, and chest pain. These effects are also categorized across several System-Organ Classes, including Nervous System Disorders, Vascular Disorders, Gastrointestinal Disorders, and Respiratory Disorders.

Official labeling emphasizes Serious Adverse Reactions, which are rare but clinically critical. The most significant concern documented is Angioedema, a rapid swelling of the face, tongue, and throat that constitutes an emergency. Other serious documented risks include the potential for Hepatic Failure and Renal Failure.

Safety notes specify that Hypotension (low blood pressure) is often more likely to occur upon the initiation of therapy or during dose increases, as specified in regulatory documents. Additionally, the label lists specific population constraints: use is contraindicated in the second and third trimesters of pregnancy due to the risk of fetal harm, and specific monitoring is cited for patients with existing renal or hepatic impairment.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documents for Altace (ramipril) define the overdose profile by focusing on the severe physiological consequences and required emergency interventions.


Overdose Scope

Domain Official Regulatory Statements
Documented Overdose Presentations The primary manifestation is Symptomatic Hypotension (severe low blood pressure), often accompanied by Dizziness, Lightheadedness, and Syncope (fainting). Overdose is associated with the risk of Hyperkalemia (elevated serum potassium).
Physiological Systems Affected Severe outcomes include Cardiovascular Collapse / Shock and potential for Acute Renal Failure. Airway obstruction due to Angioedema (swelling of the throat or tongue) is a life-threatening complication.
Dose-related or Exposure-related Factors The risk of severe hypotension is greater in patients with existing volume or salt depletion (e.g., from diuretics or vomiting) and in those with congestive heart failure.
Emergency-response Statements Management for hypotension mandates placing the patient in a supine position and initiating intravenous infusion of physiological saline. For Angioedema, immediate required action is administration of subcutaneous Epinephrine solution.
When immediate medical help is required Seek immediate medical attention or call emergency services immediately if symptoms such as Cardiovascular Collapse, difficulty breathing, or any signs of Angioedema (swelling of the face or throat) occur. The drug must be discontinued immediately if angioedema is suspected.

Overdose Classifications (High-level)

Classification Official Regulatory Statement
Severity classification Overdose carries the potential for severe and life-threatening outcomes.
Overdose-context constraints No specific antidote is officially known. Management must be strictly symptomatic and supportive.

Resulting Overdose Structure

Official overdose statements:

  • Prolonged hospital monitoring is required for symptomatic patients, including frequent assessment of serum potassium and renal function.
  • Exposure during the second and third trimesters of pregnancy is a documented risk for Fetal Toxicity, requiring immediate cessation of the drug.

Connection to the overall overdose profile: Regulatory documents define the Ramipril overdose profile by focusing exclusively on the immediate, severe consequences of excessive blood pressure reduction and associated organ risks. The profile explicitly outlines mandatory, non-advisory emergency actions—such as when to contact emergency services for severe swelling or collapse—and defines the essential supportive procedures and hospital monitoring required for professional management of these documented risks.

Therapeutic Uses of Altace

What Altace Treats: Main Uses and Benefits

Altace (ramipril) is used to manage several important cardiovascular conditions and may help deliver key symptomatic and supportive benefits. This medication is commonly used to help with high blood pressure, reduce the risk of certain cardiovascular events (like heart attack and stroke), and is relevant for easing systemic burden in certain patients with heart conditions. It provides essential support in contexts where maintaining cardiovascular stability is critical.


Easing the Burden of High Blood Pressure (Hypertension)

This application covers conditions characterized by periods of heightened symptoms related to systemic imbalance. Using Altace is applied in addressing symptom clusters, which in turn contributes to improved day-to-day comfort and stability. It is commonly used when short-term symptomatic assistance is needed.

“Altace is applied across domains where additional symptomatic support is needed to help manage conditions presenting with acute or disruptive episodes.”

Supporting Functional Stability

Altace is relevant in clinical settings following an acute myocardial infarction and for patients considered high-risk, where it is relevant when supportive symptom management is appropriate. This provides support that helps ease the overall symptom burden on the heart, and may assist with maintaining functional stability.


Quick Fact: Relief for Heightened Physiological Activity


This information must be used in conjunction with the comprehensive guidance provided by a healthcare professional.

Regulatory References

  1. NIH MedlinePlus overview on Ramipril

Eligibility and Restrictions for Use

Eligibility for Altace (Ramipril)

The official regulatory profile for Altace is defined by populations for whom use is established, restricted, or strictly prohibited based on physiological status and comorbidities.

Category Eligibility Status (Regulatory)
Absolute Contraindications Prohibited in patients with a history of angioedema (due to a previous ACE inhibitor or other cause), known hypersensitivity to any ACE inhibitor, and those taking aliskiren (if the patient has diabetes or moderate-to-severe renal impairment) [1.1, 1.6]. Use is also prohibited within 36 hours of taking sacubitril/valsartan [1.1].
Pregnancy and Lactation Contraindicated during the second and third trimesters of pregnancy due to risk of fetal harm. Treatment must be discontinued as soon as pregnancy is detected [1.6]. Use is not recommended in nursing mothers [1.6].
Age Groups Adults are the approved population for use. Pediatric use (under 18 years) is not established and not recommended due to insufficient data [1.9]. Older adults may require careful monitoring and lower initial doses [1.6].
Organ Function Patients with impaired renal function or hepatic impairment are eligible only under restricted conditions that require close monitoring of organ function [1.6]. Use is contraindicated with hemodynamically relevant bilateral renal artery stenosis [1.2].

These constraints define the official use population, excluding groups with known safety risks or insufficient efficacy data as determined by regulatory authorities.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile of Altace (ramipril) is defined by mandatory co-administration restrictions and specific effects on blood pressure and electrolytes, as documented in regulatory information.

Contraindicated and Restricted Combinations

Co-administration with Sacubitril/Valsartan is strictly prohibited; ramipril must not be taken within 36 hours of this medication due to the high risk of angioedema. Similarly, the combination with Aliskiren is contraindicated for patients with diabetes or moderate-to-severe renal impairment.

Pharmacodynamic Interactions

Additive effects are officially documented with several substance classes. Co-administration with other diuretics or antihypertensive agents can lead to excessive hypotension. When taken alongside potassium-raising agents (including potassium supplements or potassium-sparing diuretics), there is an increased risk of hyperkalemia (high blood potassium levels).

Interactions with Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) can attenuate the blood pressure-lowering effect and increase the risk of renal function deterioration. Additionally, co-administration with Lithium has been reported to cause increased serum lithium concentrations.

Absorption and Population Notes

Ramipril absorption is not affected by food in terms of total exposure, although the rate of absorption may be decreased. In patients with documented impaired liver function, the metabolism of the inactive ramipril to the active metabolite may be slowed, resulting in officially reported increases in ramipril plasma levels.

Mechanism of Action

Altace (ramipril) is a pro-drug converted primarily in the liver by carboxylesterase 1 to its active diacid metabolite, ramiprilat. Ramiprilat acts as a competitive inhibitor of the angiotensin-converting enzyme (ACE), a metallopeptidase found predominantly on the luminal surface of endothelial cells throughout the vasculature, lungs, and kidneys. This inhibition blocks the ACE-mediated conversion of the decapeptide angiotensin I to the octapeptide angiotensin II. Reduced systemic and tissue-level formation of angiotensin II results in decreased activation of the G-protein coupled angiotensin II type 1 receptors (AT1R) on vascular smooth muscle cells and the adrenal cortex. The downstream cascade involves diminished AT1R-mediated vasoconstriction and reduced aldosterone secretion, which modulates sodium and water reabsorption in the renal tubules. Furthermore, ACE is identical to kininase II, the enzyme responsible for the degradation of the vasodilatory peptide bradykinin. Inhibition of ACE by ramiprilat also reduces bradykinin inactivation, leading to elevated local concentrations of bradykinin. The system-level physiological consequence of these combined actions—decreased vasoconstriction and reduced volume—is a modulation of total peripheral resistance and circulating blood volume.

Dosage and Administration Information

How Altace is Used

Altace (ramipril) is administered orally as hard gelatin capsules in strengths of 1.25 mg, 2.5 mg, 5 mg, and 10 mg. The medicine may be taken once or twice daily, and the specific dosage and titration schedule depend strictly on the condition being addressed, as outlined in regulatory prescribing information.


Official Dosing and Adjustment Rules

Dosing regimens are established by the condition being managed. For the management of high blood pressure, the recommended initial dose is 2.5 mg once daily, with the usual maintenance range being 2.5 mg to 20 mg per day. Dosage adjustments are typically made after two to four weeks of treatment based on the response.

For cardiovascular risk reduction, the starting dose is 2.5 mg once daily for one week, followed by 5 mg once daily for three weeks, and then increasing toward a maintenance dose of 10 mg once daily. Treatment for heart failure post-myocardial infarction (MI) typically begins at 2.5 mg twice daily, with dose increases occurring approximately three weeks apart towards a target maintenance dose of 5 mg twice daily.


Administration Requirements

Feature Official Instruction
Route of Administration Oral
Timing Relative to Meals May be taken with or without food (before, during, or after meals), as food intake does not significantly affect absorption.
Capsule Preparation Capsules should generally be swallowed whole. They may also be opened and the contents sprinkled on 4 oz. of applesauce or mixed in 120 mL (4 oz.) of water or apple juice; the mixture must be consumed entirely.
Special Population Adjustments For patients with severe kidney impairment (creatinine clearance le 40 mL/min), the initial dose is typically reduced to 1.25 mg once daily, with a maximum dose of 5 mg per day for hypertension.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Altace (Ramipril)

The research base for Altace primarily consists of large, multinational randomized controlled trials (RCTs) and extensive sub-analyses. Research has examined ramipril in several key cardiovascular situations. These studies help show what has been observed so far in specific, well-defined patient groups over defined time intervals.


Evidence for Managing High Blood Pressure (Hypertension)

Research was studied for its use in high blood pressure (hypertension). Studies conducted were primarily short-term randomized controlled trials (RCTs), typically lasting a few weeks to a few months. Research examined changes in trough sitting systolic and diastolic blood pressure (BP). Studies observed patterns related to blood pressure measurements over periods of up to two years. Follow-up durations were limited for capturing very long-term outcomes in this context, and evidence suggests that findings may be mixed across different ethnic and racial groups.


Evidence for Reducing Major Cardiovascular Events in High-Risk Individuals

Ramipril was studied for its use in individuals considered high-risk due to a history of serious vascular conditions or those with diabetes plus an additional risk factor. Researchers monitored a composite outcome that included the occurrence of cardiovascular death, non-fatal heart attack, and non-fatal stroke. The major trials reported findings related to patterns in the event rate between the two observed groups over the average 4.5 years of the study. Separate analyses described patterns in individual outcomes, and research explored the findings across subgroups. The results apply only to the populations studied.


What Research Gaps and Uncertainty Remain

Research highlights what is known—and what is still uncertain—about Altace. A major area of discussion is the data showing patterns related to major cardiovascular events was associated with the modest measured differences in blood pressure, or whether it reflects other physiological changes. Research is ongoing to fully establish the relationship between these findings. Comparative evidence is lacking for ramipril against every other available antihypertensive medicine across all outcome types. There is also limited information for long-term outcomes in pediatric populations.

Frequently Asked Questions (FAQ)

Common questions about Altace (FAQ)


Q: How quickly does Altace start working after the first dose?

The blood pressure-lowering effect typically begins within one hour after an oral dose of Altace. The peak effect—when the medication is working at its strongest—is generally observed between three and six hours following administration, as documented in clinical pharmacology data.

Q: How long does it typically take to see the full effect of Altace on blood pressure?

Achieving the full, sustained blood pressure-lowering effect may require several weeks. Official prescribing information indicates that dosage adjustments are typically assessed after two to four weeks of treatment to evaluate the medication's overall response.

Q: How long does Altace stay in your system after stopping it?

Altace is converted in the body to its active compound, ramiprilat. This active compound has a prolonged elimination time, with official documents indicating a terminal elimination half-life of about 13 to 17 hours.


Q: Is the persistent dry cough a common side effect of Altace?

A persistent, non-productive dry cough is officially reported as a common side effect for Altace, consistent with the ACE inhibitor class. The cough is generally described as resolving after the medication is discontinued, according to regulatory adverse reaction profiles.

Q: Is it normal to feel tired or weak when first starting Altace?

Official drug labeling lists feelings of fatigue and weakness as common adverse reactions. Lightheadedness or dizziness may also occur, which is often more noticeable when treatment is first initiated.

Q: Can taking Altace cause headaches?

Headache is explicitly listed as a common adverse reaction in the official drug information provided by regulatory authorities.

Q: Can Altace cause changes in taste or loss of taste?

Official adverse reaction data includes reports of a transient loss of taste or changes in taste sensation. This effect is not categorized as common but is documented in the drug's official safety profile.

Q: Is it possible for Altace to cause an upset stomach or nausea?

Nausea and vomiting are documented as uncommon adverse reactions in official regulatory labeling. These effects are classified under Gastrointestinal Disorders.

Q: Can taking Altace cause blurred vision?

Blurred vision is listed as an adverse reaction in the post-marketing or less common categories in some official documents. Official patient counseling materials generally advise that vision changes be discussed with a health care provider.

Q: Can Altace cause symptoms like a tingling sensation or numbness in the hands or feet?

The drug's official safety profile includes reports of nerve-related effects, such as paresthesia (which includes feelings of tingling or numbness). This symptom is documented in the official adverse reaction data.

Q: Is there a link between taking Altace and feeling confused or forgetful?

The adverse reaction profile, under Nervous System Disorders, includes reports of confusion in the post-marketing or less common categories. Official patient counseling information often advises that persistent changes in cognitive function be reported to a health care provider.

Q: Does Altace make a person more sensitive to the sun or cause a skin rash?

The drug's official safety profile includes reports of rash and other skin reactions. A specific, prominent warning for photosensitivity (sun sensitivity) is not universally present in core official labeling.

Q: Does Altace cause weight gain or weight loss?

The adverse event profile has documented rare cases of weight gain. Weight loss is not a commonly or prominently listed effect in the official regulatory documentation.

Q: Can Altace affect a person's sex drive?

The official adverse event profile for Altace includes reports of impotence (erectile dysfunction) in the post-marketing or less common categories.

Q: What kind of tests are done to monitor the effects of Altace?

Official monitoring recommendations include checking serum creatinine (to check kidney function) and serum potassium (to check electrolyte levels) before starting treatment and periodically thereafter, especially following dosage adjustments.


Q: What should be reported to a doctor right away after starting Altace?

Official labeling advises that signs or symptoms suggesting angioedema should be reported immediately. These symptoms include swelling of the face, eyes, lips, or tongue, or any difficulty breathing. Patients are also generally advised to promptly report signs of infection, such as fever or a persistent sore throat.

Q: Is it important to keep taking Altace even if my blood pressure is now low?

Altace is typically prescribed for long-term management of chronic conditions. Regulatory instructions state that patients should not stop taking the medication or change the dosage unless directed to do so by the prescribing health care provider.

Q: What should be done if a dose of Altace is missed?

Official guidance advises against taking a double dose to compensate for a missed one, as this practice may increase the chance of experiencing side effects. If a dose is missed, a health care provider should be consulted for specific next steps.

Q: What if I need to have surgery while taking Altace?

Official labeling states that patients undergoing surgery or anesthesia may be at risk of experiencing excessive hypotension (low blood pressure) due to the drug's effect on compensatory mechanisms. Anesthesia providers should be informed of the patient's use of Altace beforehand.

Q: Is it safe to take Altace with an ARB (Angiotensin II Receptor Blocker)?

Official regulatory information states that the combination of an ACE inhibitor (like Altace) and an Angiotensin II Receptor Blocker (ARB) is not generally recommended. This combination is contraindicated (strictly prohibited) in specific patients, such as those with diabetic nephropathy.

Q: Is Altace considered an addictive medication?

Altace (ramipril) is classified as an Angiotensin-Converting Enzyme (ACE) Inhibitor. It is not listed as a controlled substance under federal or international drug schedules.


Q: Why is Altace prescribed for patients whose blood pressure is not severely high?

Altace is approved for more than just managing existing high blood pressure. It is also officially indicated for reducing the risk of major cardiovascular events (such as heart attack or stroke) in high-risk patients, which is a separate approved purpose according to official documents.

Q: What is the relationship between Altace and heart attack or stroke risk?

Altace is officially indicated for the reduction of risk of myocardial infarction (heart attack), stroke, and cardiovascular death in certain patient populations defined by their high risk profile. Research has examined its ability to help manage these risks over time.

Q: Are there any specific foods or beverages to avoid while taking Altace?

Regulatory documents advise caution and consultation with a health care provider before using salt substitutes containing potassium because of the heightened risk of developing hyperkalemia (high blood potassium levels). Food intake itself does not significantly affect the total absorption of ramipril.

Q: Is it safe to drink alcohol in moderation while taking Altace?

Official drug documents indicate that alcohol may increase the effect of Altace, which can potentially lead to symptoms such as dizziness or lightheadedness, as both substances can lower blood pressure. Official information advises patients to consult their health care provider regarding alcohol consumption and that intake should generally be limited.

Q: Does Altace affect blood sugar levels, especially for people with diabetes?

Clinical data summarized in official sources has reported elevations in blood glucose levels as a lab abnormality in trials. Conversely, hypoglycemia (low blood sugar) has been rarely reported in the post-marketing setting in patients taking other oral diabetes medications or insulin.

Q: Why might Altace not work as effectively for lowering blood pressure in Black patients?

Clinical data summarized in official sources suggests that the blood pressure-lowering effect of ACE inhibitors, including ramipril, may be less pronounced in Black patients compared to non-Black patients. This pattern is documented in the official prescribing information for this population.

How should Altace be stored and disposed of?

Altace capsules must be stored at Controlled Room Temperature, which is officially defined as 20 C to 25 C (68 F to 77 F). Temporary temperature excursions are permitted up to 30 C (86 F). The finished capsule product is not required to be refrigerated for storage.

However, if the capsule contents are prepared as a mixture (such as with water or applesauce), this preparation has a limited stability period: it must be used or discarded after 24 hours if stored at room temperature or after 48 hours if kept under refrigeration.

For safety, the medication must always be stored strictly out of the reach of children. Disposal of any unused or expired Altace product must strictly follow the official local regulations for pharmaceutical waste collection.

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

Available in countries:

Equivalent of Altace found in:

A-Z Index: