Introduction
Cardipro Plus Tablet 50 mg+25 mg is a combination medication used for the treatment of high blood pressure (hypertension). Atenolol is a beta-blocker that reduces heart rate and blood pressure, while Chlorthalidone is a diuretic (water pill) that helps to eliminate excess fluid from the body. Together, they help lower blood pressure, reduce the risk of stroke, heart attack, and kidney problems.
Uses
The primary use of Cardipro Plus Tablet 50 mg+25 mg is in the management of hypertension (high blood pressure). It can also be used to reduce the risk of cardiovascular events in patients with hypertension. In some cases, this combination may be used to manage other cardiovascular conditions where both blood pressure and fluid retention need to be controlled.
| Brand Name | Cardipro Plus |
|---|---|
| Type | Tablet |
| Weight | 50 mg+25 mg |
| Generic | Atenolol + Chlorthalidone |
| Manufacturer | Square Pharmaceuticals Ltd. |
| Available in | English বাংলা |
Mechanism of Action
Atenolol works by blocking beta-adrenergic receptors in the heart, reducing the force and rate of the heart's contractions, which leads to a decrease in blood pressure. Chlorthalidone, on the other hand, acts on the kidneys to reduce sodium reabsorption, leading to increased excretion of water and electrolytes, which helps decrease blood pressure by reducing fluid volume in the bloodstream.
How Long Does It Take to Work?
The antihypertensive effects of Cardipro Plus Tablet 50 mg+25 mg may be seen within a few hours of administration, but it may take up to 1 to 2 weeks for full blood pressure control to be achieved. Regular use is important for maintaining consistent blood pressure levels.
Absorption
Atenolol is well absorbed from the gastrointestinal tract, with an oral bioavailability of about 50%. Chlorthalidone is also well absorbed, with peak plasma levels occurring within 2 to 6 hours after oral administration. Food does not significantly affect the absorption of either drug.
Route of Elimination
Atenolol is primarily excreted unchanged in the urine, while Chlorthalidone is mainly excreted unchanged via the kidneys. Both drugs rely on renal function for clearance.
Dosage
The initial dose is Atenolol 50 mg and Chlorthalidone 25 mg once a day. If an optimal response is not achieved, another antihypertensive agent may be added gradually beginning with 50 percent of the usual recommended starting dose to avoid an excessive fall in blood pressure. Atenolol is excreted via kidneys and therefore dosage should be adjusted in cases of severe impairment of renal function.Use in elderly: Clinical studies of Atenolol & Chlorthalidone combination did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects.
The typical dosage of Cardipro Plus Tablet 50 mg+25 mg is one tablet daily. Dosage strength varies, but common combinations include:
- 50 mg Atenolol + 25 mg Chlorthalidone once daily.
- 100 mg Atenolol + 25 mg Chlorthalidone once daily.
Administration
Cardipro Plus Tablet 50 mg+25 mg should be taken orally, preferably at the same time each day. It can be taken with or without food. The tablet should be swallowed whole with a glass of water. If a dose is missed, it should be taken as soon as remembered, unless it is close to the time of the next dose.
Side Effects
Common side effects include:
- Fatigue
- Dizziness
- Low blood pressure (hypotension)
- Cold extremities
- Nausea
- Increased urination (due to Chlorthalidone)
- Bradycardia (slow heart rate)
- Electrolyte imbalances (e.g., low potassium levels)
- Severe hypotension
- Kidney impairment
Toxicity
Overdose of Cardipro Plus Tablet 50 mg+25 mg can lead to severe bradycardia, hypotension, electrolyte disturbances, and dehydration. In severe cases, overdose may result in heart failure or renal failure. Immediate medical intervention is required in cases of overdose, including supportive care and, if necessary, the administration of intravenous fluids and electrolytes.
Precautions
Cardipro Plus Tablet 50 mg+25 mg should be used with caution in patients with renal impairment, as both drugs are eliminated through the kidneys. Patients with diabetes should also be monitored closely, as beta-blockers may mask symptoms of hypoglycemia. Caution is also advised in patients with respiratory disorders, such as asthma, due to Atenolol's potential to cause bronchoconstriction.
Interaction
Cardipro Plus Tablet 50 mg+25 mg can interact with:
- Other antihypertensives (e.g., ACE inhibitors, ARBs) leading to additive blood pressure-lowering effects.
- Nonsteroidal anti-inflammatory drugs (NSAIDs), which may reduce the efficacy of the medication.
- Insulin or oral antidiabetic medications, as Atenolol can mask signs of hypoglycemia.
- Drugs affecting electrolyte balance, such as corticosteroids or laxatives, which may enhance the risk of electrolyte disturbances.
Disease Interaction
Use with caution in patients with:
- Asthma or chronic obstructive pulmonary disease (COPD), due to potential bronchospasm from Atenolol.
- Diabetes, as beta-blockers can mask symptoms of hypoglycemia.
- Renal or hepatic impairment.
- Severe peripheral vascular disease.
Drug Interaction
Important drug interactions include:
- Calcium channel blockers (e.g., verapamil), which may increase the risk of bradycardia or hypotension when used with Atenolol.
- NSAIDs, which may reduce the antihypertensive effects of the combination.
- Digoxin, which may enhance the risk of bradycardia.
- Drugs that affect electrolyte levels (e.g., diuretics or corticosteroids) may increase the risk of electrolyte imbalances with Chlorthalidone.
Food Interactions
Food does not significantly affect the absorption of Atenolol or Chlorthalidone. However, patients should maintain adequate fluid intake to prevent dehydration, especially when on a diuretic.
Pregnancy Use
Atenolol is classified as pregnancy category D due to evidence of fetal harm in humans. It should only be used during pregnancy if the potential benefits outweigh the risks. Chlorthalidone is also not recommended during pregnancy as it may cause electrolyte disturbances in the mother and fetus.
Lactation Use
Atenolol is excreted in breast milk and may affect a nursing infant, leading to bradycardia or other cardiovascular effects. Chlorthalidone may also be excreted in breast milk. Breastfeeding is generally not recommended during treatment with Cardipro Plus Tablet 50 mg+25 mg.
Acute Overdose
In the event of an acute overdose, symptoms may include severe hypotension, bradycardia, electrolyte imbalances, and dehydration. Immediate medical attention is required, including supportive care, intravenous fluids, electrolyte replacement, and monitoring of cardiovascular and renal function.
Contraindication
Cardipro Plus Tablet 50 mg+25 mg is contraindicated in patients with:
- Severe bradycardia
- Heart block greater than first degree
- Cardiogenic shock
- Uncontrolled heart failure
- Anuria (due to Chlorthalidone)
- Hypersensitivity to Atenolol, Chlorthalidone, or any of the components of the medication
Use Direction
Cardipro Plus Tablet 50 mg+25 mg should be taken orally, typically once daily. The medication should be taken at the same time each day, and patients should follow their doctor’s directions for dose adjustments based on blood pressure response. It can be taken with or without food.
Storage Conditions
Store Cardipro Plus Tablet 50 mg+25 mg tablets at room temperature (20-25°C), away from moisture, heat, and direct sunlight. Keep the medication out of reach of children.
Volume of Distribution
The volume of distribution for Atenolol is approximately 50-75 L, indicating it has limited tissue penetration. Chlorthalidone has a volume of distribution of around 3-8 L/kg, indicating extensive tissue binding, particularly in red blood cells.
Half-Life
Atenolol has a half-life of approximately 6 to 7 hours, while Chlorthalidone has a much longer half-life, ranging from 40 to 60 hours, allowing for once-daily dosing.
Clearance
Atenolol is primarily cleared through renal excretion, with about 85% of an oral dose excreted unchanged in the urine. Chlorthalidone is also excreted primarily via the kidneys, with a clearance rate that may be prolonged in patients with renal impairment.
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