Enalapril 5mg Tablets

Manufacturer TARO Active Ingredient Enalapril Tablets(e NAL a pril) Pronunciation e NAL a pril
WARNING: Do not take if you are pregnant. Use during pregnancy may cause birth defects or loss of the unborn baby. If you get pregnant or plan on getting pregnant while taking this drug, call your doctor right away. @ COMMON USES: It is used to treat high blood pressure.It is used to treat heart failure (weak heart).It is used in certain patients with heart failure to lower the chance of having to go to the hospital for heart failure that gets worse.It may be given to you for other reasons. Talk with the doctor.
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Drug Class
Antihypertensive; Heart Failure Agent
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Pharmacologic Class
Angiotensin-Converting Enzyme (ACE) Inhibitor
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Pregnancy Category
D (1st Trimester), X (2nd & 3rd Trimesters)
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FDA Approved
Dec 1985
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DEA Schedule
Not Controlled

Overview

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What is this medicine?

Enalapril is a medication used to treat high blood pressure and heart failure. It works by relaxing blood vessels, which helps lower blood pressure and makes it easier for your heart to pump blood.
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How to Use This Medicine

Taking Your Medication

To use this medication correctly, follow your doctor's instructions and read all the information provided. Take your medication at the same time every day. Continue taking it as directed by your doctor or healthcare provider, even if you're feeling well.

It's essential to stay hydrated by drinking plenty of non-caffeinated liquids, unless your doctor advises you to limit your fluid intake. If you have difficulty swallowing pills, you can discuss the option of a liquid suspension with your doctor or pharmacist.

When taking the liquid suspension, make sure to shake it well before use. To ensure accurate dosing, use the measuring device that comes with the medication. If one is not provided, ask your pharmacist for a suitable measuring device.

Storing and Disposing of Your Medication

Store your medication at room temperature, avoiding freezing and excessive heat. Keep it in a dry place, away from bathrooms.

Missing a Dose

If you miss a dose, take it as soon as you remember. However, if it's close to the time for your next scheduled dose, skip the missed dose and resume your regular dosing schedule. Do not take two doses at the same time or take extra doses.
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Lifestyle & Tips

  • Take medication exactly as prescribed, usually once or twice daily.
  • Do not stop taking enalapril without consulting your doctor, even if you feel well.
  • Limit sodium intake as advised by your doctor.
  • Avoid potassium supplements or salt substitutes containing potassium unless directed by your doctor.
  • Maintain a healthy diet, regular exercise, and manage stress.
  • Avoid excessive alcohol consumption, as it can lower blood pressure further.

Dosing & Administration

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Adult Dosing

Standard Dose: Hypertension: Initial 5 mg once daily; Heart Failure: Initial 2.5 mg once or twice daily
Dose Range: 2.5 - 40 mg

Condition-Specific Dosing:

Hypertension: Initial 5 mg once daily, titrate to 10-40 mg/day in 1-2 divided doses. Max 40 mg/day.
Heart Failure: Initial 2.5 mg once or twice daily, titrate gradually over weeks to target dose of 10-20 mg twice daily. Max 40 mg/day.
Asymptomatic Left Ventricular Dysfunction: Initial 2.5 mg twice daily, titrate to 10 mg twice daily.
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Pediatric Dosing

Neonatal: Not established
Infant: Not established
Child: Hypertension (â‰Ĩ1 month): Initial 0.08 mg/kg once daily (max 5 mg), titrate to max 0.6 mg/kg/day (max 40 mg/day).
Adolescent: Hypertension: Initial 0.08 mg/kg once daily (max 5 mg), titrate to max 0.6 mg/kg/day (max 40 mg/day).
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Dose Adjustments

Renal Impairment:

Mild: CrCl >30 mL/min: No adjustment needed.
Moderate: CrCl 10-30 mL/min: Initial 2.5 mg once daily for hypertension; 2.5 mg once daily for heart failure.
Severe: CrCl <10 mL/min: Initial 2.5 mg on dialysis days for hypertension; 2.5 mg on dialysis days for heart failure.
Dialysis: Enalaprilat is dialyzable. Administer dose after dialysis on dialysis days. Initial 2.5 mg once daily.

Hepatic Impairment:

Mild: No specific adjustment recommended, use with caution.
Moderate: No specific adjustment recommended, use with caution.
Severe: No specific adjustment recommended, use with caution. Monitor closely.

Pharmacology

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Mechanism of Action

Enalapril is a prodrug that is hydrolyzed to enalaprilat, its active metabolite. Enalaprilat is an angiotensin-converting enzyme (ACE) inhibitor. It prevents the conversion of angiotensin I to angiotensin II, a potent vasoconstrictor. This leads to decreased angiotensin II levels, resulting in vasodilation, reduced aldosterone secretion (leading to decreased sodium and water reabsorption), and decreased sympathetic activity. It also inhibits the degradation of bradykinin, a vasodilator, which may contribute to its antihypertensive effect and some side effects like cough and angioedema.
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Pharmacokinetics

Absorption:

Bioavailability: Approximately 60% (as enalaprilat)
Tmax: Enalapril: 0.5-1.5 hours; Enalaprilat: 3-4 hours
FoodEffect: Food does not affect absorption of enalapril.

Distribution:

Vd: Not available (Enalaprilat: 1.7 L/kg)
ProteinBinding: Enalaprilat: Approximately 50-60%
CnssPenetration: Limited

Elimination:

HalfLife: Enalapril: 1.3 hours; Enalaprilat: 11 hours (effective accumulation half-life)
Clearance: Enalaprilat: Approximately 18 L/hr
ExcretionRoute: Renal (primarily as enalaprilat and unchanged enalapril)
Unchanged: Approximately 6% (enalapril); 20% (enalaprilat)
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Pharmacodynamics

OnsetOfAction: Hypertension: 1 hour
PeakEffect: Hypertension: 4-6 hours
DurationOfAction: Hypertension: 24 hours

Safety & Warnings

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BLACK BOX WARNING

When pregnancy is detected, discontinue enalapril as soon as possible. Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus.
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Side Effects

Urgent Side Effects: Seek Medical Help Right Away

While rare, some people may experience severe and potentially life-threatening side effects when taking this medication. If you experience any of the following symptoms, contact your doctor or seek medical attention immediately:

Signs of an allergic reaction, such as:
+ Rash
+ Hives
+ Itching
+ Red, swollen, blistered, or peeling skin with or without fever
+ Wheezing
+ Tightness in the chest or throat
+ Trouble breathing, swallowing, or talking
+ Unusual hoarseness
+ Swelling of the mouth, face, lips, tongue, or throat
Signs of kidney problems, including:
+ Inability to pass urine
+ Changes in urine output
+ Blood in the urine
+ Sudden weight gain
Signs of high potassium levels, such as:
+ Abnormal heartbeat
+ Confusion
+ Weakness, lightheadedness, or dizziness
+ Feeling like passing out
+ Numbness or tingling
+ Shortness of breath
Severe dizziness or fainting
Persistent cough
Chest pain or pressure
Signs of liver problems, including:
+ Dark urine
+ Fatigue
+ Decreased appetite
+ Nausea or stomach pain
+ Light-colored stools
+ Vomiting
+ Yellow skin or eyes (jaundice)

Note: Liver problems have been reported with similar medications, and in some cases, have been fatal.

Other Possible Side Effects

Like all medications, this drug can cause side effects. Many people experience no side effects or only mild ones. If you experience any of the following side effects, or if they bother you or do not go away, contact your doctor or seek medical attention:

Dizziness
* Cough

This is not an exhaustive list of possible side effects. If you have questions or concerns about side effects, contact your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
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Seek Immediate Medical Attention If You Experience:

  • Sudden swelling of the face, lips, tongue, or throat (angioedema) - this is a medical emergency, seek immediate help.
  • Severe dizziness or fainting, especially when standing up.
  • Persistent dry cough that does not go away.
  • Signs of infection like fever or sore throat.
  • Yellowing of the skin or eyes (jaundice).
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Before Using This Medicine

Before Taking This Medication: Important Information to Share with Your Doctor

It is essential to inform your doctor about the following conditions before starting this medication:

Any allergies you have, including allergies to this drug, its components, or other substances, such as foods or medications. Describe the symptoms you experienced during the allergic reaction.
Kidney disease, as this may affect how your body processes the medication.
A history of angioedema, a severe and potentially life-threatening reaction characterized by swelling of the hands, face, lips, eyes, tongue, or throat, difficulty breathing, swallowing problems, or unusual hoarseness.
If you are taking a medication containing aliskiren, especially if you have diabetes or kidney problems.
If you have taken a medication containing sacubitril within the last 36 hours.
If you are breastfeeding, as you should not breastfeed while taking this medication.

Special Considerations for Children:

If the patient is under 1 month of age, do not administer this medication, as it is not suitable for infants at this age.
If the child was born premature and has not yet reached the corrected age of 44 weeks, consult with your doctor before giving this medication.

Additional Important Information:

This list is not exhaustive, and it is crucial to inform your doctor and pharmacist about all your medications, including prescription and over-the-counter drugs, natural products, and vitamins, as well as any health problems you have. This will help ensure your safety while taking this medication. Never start, stop, or change the dose of any medication without consulting your doctor first.
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Precautions & Cautions

Important Warnings and Cautions

It is essential to inform all your healthcare providers, including doctors, nurses, pharmacists, and dentists, that you are taking this medication.

Caution with Daily Activities
Until you know how this medication affects you, avoid driving and other activities that require you to be alert. To minimize the risk of dizziness or fainting, get up slowly from a sitting or lying down position, and be cautious when climbing stairs.

Monitoring Your Condition
Regularly check your blood pressure as directed by your healthcare provider. Additionally, have your blood work checked as instructed by your doctor, and discuss the results with them.

Interactions with Other Substances
If you are taking a salt substitute containing potassium, a potassium-sparing diuretic, or a potassium product, consult your doctor. Similarly, if you are on a low-salt or salt-free diet, discuss this with your doctor to ensure safe use of this medication.

Infection Risk
Low white blood cell counts have been associated with captopril, a similar medication. This may increase your risk of infection, particularly if you have kidney problems or other underlying health conditions. Seek immediate medical attention if you experience symptoms of infection, such as fever, chills, or sore throat.

Over-the-Counter Products and Interactions
If you have high blood pressure and are taking this medication, consult your doctor before using over-the-counter products that may increase blood pressure, including cough or cold medications, diet pills, stimulants, non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or naproxen, and certain natural products or aids.

Alcohol Consumption
Discuss your alcohol consumption with your doctor before drinking while taking this medication.

Heat and Fluid Loss
Be cautious in hot weather or during physical activity, and drink plenty of fluids to prevent dehydration. If you experience excessive sweating, fluid loss, vomiting, or diarrhea, inform your doctor, as this may lead to low blood pressure.

Effectiveness in Black Patients
This medication may be less effective in lowering blood pressure in Black patients. In some cases, additional medication may be necessary. If you have questions or concerns, discuss them with your doctor.

Risk of Angioedema
A severe and potentially life-threatening reaction called angioedema has been associated with this medication. The risk of angioedema may be higher in Black patients.
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Overdose Information

Overdose Symptoms:

  • Severe hypotension (low blood pressure)
  • Dizziness
  • Lightheadedness
  • Fainting
  • Tachycardia (rapid heart rate)
  • Palpitations
  • Renal failure

What to Do:

Call 1-800-222-1222 (Poison Control Center) immediately or seek emergency medical attention. Treatment is supportive, including intravenous fluid administration to restore blood pressure.

Drug Interactions

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Contraindicated Interactions

  • Aliskiren (in patients with diabetes or renal impairment)
  • Sacubitril/valsartan (Entresto) - concurrent use or within 36 hours of last dose of sacubitril/valsartan
  • History of angioedema related to previous ACE inhibitor treatment
  • Hereditary or idiopathic angioedema
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Major Interactions

  • Potassium-sparing diuretics (e.g., spironolactone, triamterene, amiloride) - increased risk of hyperkalemia
  • Potassium supplements - increased risk of hyperkalemia
  • Lithium - increased lithium levels and toxicity
  • NSAIDs (e.g., ibuprofen, naproxen) - may reduce antihypertensive effect and increase risk of renal impairment
  • mTOR inhibitors (e.g., sirolimus, everolimus, temsirolimus) - increased risk of angioedema
  • Neprilysin inhibitors (e.g., sacubitril) - increased risk of angioedema
  • Gold (parenteral) - nitritoid reactions (facial flushing, nausea, vomiting, hypotension)
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Moderate Interactions

  • Diuretics (thiazide, loop) - increased risk of symptomatic hypotension (especially with initial dose)
  • Other antihypertensives - additive hypotensive effects
  • Insulin and oral hypoglycemics - increased risk of hypoglycemia
  • Allopurinol - increased risk of hypersensitivity reactions
  • Immunosuppressants - increased risk of hypersensitivity reactions
  • Tricyclic antidepressants, antipsychotics - enhanced hypotensive effect
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Minor Interactions

  • Alcohol - additive hypotensive effect

Monitoring

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Baseline Monitoring

Blood Pressure (BP)

Rationale: To establish baseline and guide initial dosing.

Timing: Prior to initiation

Serum Creatinine (SCr) and Blood Urea Nitrogen (BUN)

Rationale: To assess renal function, as enalapril is renally eliminated and can affect renal function.

Timing: Prior to initiation

Serum Potassium (K+)

Rationale: To assess baseline potassium levels, as enalapril can cause hyperkalemia.

Timing: Prior to initiation

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Routine Monitoring

Blood Pressure (BP)

Frequency: Regularly, especially after dose changes and during maintenance therapy

Target: <130/80 mmHg (or individualized target)

Action Threshold: Persistent hypotension (<90/60 mmHg) or uncontrolled hypertension

Serum Creatinine (SCr) and Blood Urea Nitrogen (BUN)

Frequency: Within 1-2 weeks of initiation or dose increase, then periodically (e.g., every 3-6 months) or as clinically indicated.

Target: Stable or within acceptable limits (e.g., <30% increase from baseline)

Action Threshold: Significant increase in SCr (>30% from baseline or >2.5 mg/dL), indicating potential renal impairment or acute kidney injury.

Serum Potassium (K+)

Frequency: Within 1-2 weeks of initiation or dose increase, then periodically (e.g., every 3-6 months) or as clinically indicated, especially in patients with renal impairment or on potassium-sparing diuretics.

Target: 3.5-5.0 mEq/L

Action Threshold: Hyperkalemia (>5.5 mEq/L)

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Symptom Monitoring

  • Dizziness or lightheadedness (especially upon standing)
  • Persistent dry cough
  • Swelling of face, lips, tongue, throat (angioedema) - seek immediate medical attention
  • Difficulty breathing or swallowing
  • Signs of infection (fever, sore throat) due to rare neutropenia
  • Yellowing of skin or eyes (jaundice) due to rare hepatic dysfunction

Special Patient Groups

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Pregnancy

Contraindicated in the 2nd and 3rd trimesters due to risk of fetal injury and death. Use in the 1st trimester is generally discouraged due to potential risks, and alternative antihypertensive therapies are preferred.

Trimester-Specific Risks:

First Trimester: Limited data, but potential for major congenital malformations cannot be excluded. Generally classified as Pregnancy Category D.
Second Trimester: Significant risk of fetal renal dysfunction, oligohydramnios, fetal lung hypoplasia, skeletal deformations, and death. Classified as Pregnancy Category X.
Third Trimester: Significant risk of fetal renal dysfunction, oligohydramnios, fetal lung hypoplasia, skeletal deformations, and death. Classified as Pregnancy Category X.
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Lactation

Enalapril and enalaprilat are excreted in breast milk in small amounts. Generally considered low risk for healthy, full-term infants, but caution is advised, especially for preterm or neonates. Monitor infant for hypotension.

Infant Risk: Low risk (L3 - Moderately safe)
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Pediatric Use

Approved for hypertension in children â‰Ĩ1 month. Dosing is weight-based. Close monitoring of blood pressure and renal function is essential. Not recommended for heart failure in pediatric patients due to limited data.

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Geriatric Use

Start with lower doses (e.g., 2.5 mg once daily) due to potential for decreased renal function and increased sensitivity to hypotensive effects. Monitor renal function and potassium closely.

Clinical Information

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Clinical Pearls

  • First-dose hypotension can occur, especially in patients who are volume-depleted (e.g., on diuretics). Consider discontinuing diuretics 2-3 days before starting enalapril if possible.
  • A persistent dry cough is a common side effect of ACE inhibitors and may necessitate switching to an ARB.
  • Angioedema is a rare but life-threatening side effect. Patients should be educated on symptoms and instructed to seek immediate medical attention if it occurs.
  • Monitor potassium levels regularly, especially in patients with renal impairment, diabetes, or those taking potassium-sparing diuretics or supplements.
  • Enalapril is a prodrug; its active form, enalaprilat, is responsible for the therapeutic effects.
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Alternative Therapies

  • Other ACE inhibitors (e.g., lisinopril, ramipril, captopril)
  • Angiotensin Receptor Blockers (ARBs) (e.g., losartan, valsartan, candesartan)
  • Beta-blockers (e.g., metoprolol, carvedilol)
  • Calcium Channel Blockers (CCBs) (e.g., amlodipine, nifedipine)
  • Diuretics (e.g., hydrochlorothiazide, furosemide)
  • Direct Renin Inhibitors (e.g., aliskiren - limited use)
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Cost & Coverage

Average Cost: Varies widely, typically low for generic per 30 tablets
Generic Available: Yes
Insurance Coverage: Tier 1 (Generic)
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General Drug Facts

If your symptoms or health issues persist or worsen, it is essential to contact your doctor for further guidance. To ensure your safety, never share your medication with others or take someone else's medication. Some medications may come with an additional patient information leaflet, so it's a good idea to check with your pharmacist. If you have any questions or concerns about this medication, don't hesitate to discuss them with your doctor, nurse, pharmacist, or other healthcare provider. In the event of a suspected overdose, immediately call your local poison control center or seek emergency medical attention. When reporting the incident, be prepared to provide details about the medication taken, the amount, and the time it occurred.