Accupril (Quinapril)

Prescription Required
Brand
Dose Size & Price Qty
40mg
Generic
Dose Size & Price Qty
5mg
10mg
20mg
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Fact Table

Fact Table
Formula C25H30N2O5•HCl
License FDA approved; Accupril (NDA 019885) was marketed in the U.S. starting November 19, 1991
Bioavailability ~60% (oral)
Legal status Prescription only (Rx)
Chemical Name [3S-[2[R*(R*)],3R*]]-2-[2-[[1-(Ethoxycarbonyl)-3-phenylpropyl]amino]-1-oxopropyl]-1,2,3,4-tetrahydro-3-isoquinolinecarboxylic acid, monohydrochloride
Elimination half-life ~2 hours
Dosage (Strength) 5 mg, 10 mg, 20 mg, and 40 mg oral tablets; usual adult dose 10–80 mg/day depending on indication
Pregnancy Contraindicated in pregnancy; discontinue as soon as pregnancy is detected
Brands Accupril; generic quinapril hydrochloride available
Protein binding ~97%
PubChem CID 54892
MedlinePlus a692026
ChEBI 8713
ATC code C09AA06
DrugBank DB00881
KEGG D03752
Routes of administration By mouth (oral tablets)

Accupril (quinapril hydrochloride) is an ACE inhibitor medication used to treat high blood pressure and heart failure. It works by blocking a process in the body that tightens blood vessels, allowing them to relax and making it easier for the heart to pump blood. The medication comes as an oral tablet and can be prescribed alone or alongside other medications to manage cardiovascular conditions.

Directions

Quinapril is taken by mouth, typically once or twice daily, with or without food. For high blood pressure, the usual starting dose is 10 mg or 20 mg once daily, which may be changed based on blood pressure response.

Patients already taking diuretics should start with a lower dose of 5 mg. For heart failure, treatment typically begins at 5 mg once or twice daily. The maximum recommended dose is 80 mg daily, which may be given as a single dose or divided into two doses.

Swallow tablets whole and keep consistent timing each day for the best results. Missing doses may reduce effectiveness, so take a missed dose as soon as it's remembered unless it's nearly time for the next scheduled dose.

Ingredients

The active ingredient in Accupril is quinapril.

Cautions

Before using this medication, you may want to consult a healthcare provider about the following:

  • Any existing health conditions
  • Any allergies
  • A list of all medications currently being taken
  • Accupril may cause angioedema, which is swelling of the face, lips, tongue, or throat that can block breathing. Stop the medication and seek emergency care if swelling or trouble breathing occurs.
  • Blood pressure may drop too much. Accupril can sometimes cause dizziness, lightheadedness, or fainting, especially when starting treatment or if you are dehydrated.
  • Medications like Accupril can harm or even cause death to an unborn baby, especially during the second or third trimester. Contact a healthcare provider immediately if you become pregnant.
  • Kidney function may change. Some people may develop worsening kidney function while taking Accupril, particularly those with kidney disease or heart failure.
  • High potassium levels can occur. Accupril may raise potassium levels in the blood, especially in people with kidney problems or those taking potassium supplements.
  • Persistent dry cough may develop. A common side effect of ACE inhibitors like Accupril is a long-lasting dry cough that usually goes away after stopping the medication.
  • Rare but serious liver problems have been reported. Stop taking the medication and seek medical care if you develop yellowing of the skin or eyes, which may indicate liver injury.
  • Tell healthcare providers before surgery. Accupril may affect blood pressure during surgery or anesthesia, so inform your doctor if you are taking this medication.
  • Certain medications can interact. Diuretics, potassium supplements, lithium, NSAIDs, and some other medications may interact with Accupril and increase side effects.
  • Breastfeeding requires caution. Accupril can pass into breast milk, so discuss risks and benefits with your healthcare provider if you are nursing.

Contraindications

Avoid taking or using this medication if any of the following apply:

  • Hypersensitivity to quinapril or any ingredient of the product
  • History of angioedema related to previous ACE inhibitor therapy
  • Hereditary or idiopathic angioedema
  • Pregnancy (second and third trimesters)
  • Combined use with aliskiren in people with diabetes
  • Combined use with neprilysin inhibitors or within 36 hours of discontinuing such treatment
  • Combined use with aliskiren in people with kidney problems

Side Effects

Common side effects of Accupril include:

  • Headache
  • Dizziness
  • Fatigue
  • Dry cough

These side effects are usually mild and temporary as the body adjusts to the medication. Some people may also experience nausea, vomiting, abdominal discomfort, or diarrhea. Dizziness may occur more often when starting treatment or after dose changes.

More serious side effects are rare but possible. Accupril can sometimes cause low blood pressure, kidney problems, or high potassium levels. Rarely, it may trigger a severe allergic reaction called angioedema, which causes swelling of the face, lips, tongue, or throat and can be life-threatening. Seek immediate medical care if you develop swelling of the face or throat, trouble breathing, or severe dizziness.

Frequently Asked Questions about Accupril (Quinapril)


What is Accupril used for?

Accupril is the brand name for quinapril, an ACE inhibitor used to treat high blood pressure. It is also used in some patients with heart failure, usually along with other medicines, to help the heart work more effectively and reduce symptoms.


How does Accupril work?

Accupril works by blocking angiotensin-converting enzyme, which helps relax blood vessels. This lowers blood pressure and reduces the workload on the heart, which can improve circulation and help in heart failure management.


How is Accupril usually taken?

Accupril is taken by mouth, usually once or twice a day depending on the condition being treated and the prescribed dose. It should be taken exactly as directed, and it can be taken with or without food unless a clinician gives different instructions.


What are the most common side effects of Accupril?

Common side effects can include cough, dizziness, headache, tiredness, and low blood pressure. Some people may also notice nausea. Dizziness can be more noticeable when first starting treatment or after a dose increase.


Are there serious warnings with Accupril?

Yes. A major warning is that Accupril should not be used during pregnancy because it can harm or even be fatal to a developing baby. It can also rarely cause angioedema, which is swelling of the face, lips, tongue, or throat and can become a medical emergency.


Can Accupril affect kidney function or potassium levels?

Yes. Accupril can affect kidney function in some patients and may raise potassium levels. This is why blood tests may be checked during treatment, especially in people with kidney disease, diabetes, dehydration, or those taking diuretics or potassium supplements.


What medicines can interact with Accupril?

Accupril can interact with diuretics, potassium supplements, salt substitutes containing potassium, NSAID pain relievers, lithium, and some other blood pressure medicines. These interactions can increase the risk of low blood pressure, kidney problems, or abnormal potassium levels.


What should someone know about the cough linked to Accupril?

A dry, persistent cough can happen with ACE inhibitors like Accupril. It is not dangerous in most cases, but it can be bothersome and may continue until the medicine is stopped. Any ongoing cough should be discussed with the prescriber.


What should someone do if they miss a dose?

A missed dose is usually taken as soon as remembered unless it is almost time for the next dose. If it is close to the next scheduled dose, the missed dose should be skipped and the regular dosing schedule resumed. Two doses should not be taken at the same time.


Who should not take Accupril?

Accupril is generally not appropriate for people with a history of ACE inhibitor-related angioedema, certain pregnancy situations, or known allergy to quinapril. People with kidney disease, low blood pressure, or heart failure still may use it, but they often need closer medical monitoring.

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