Calan – A Prescription Medication for Treating High Blood Pressure and Heart Conditions


Active Ingredient: Verapamil

Dosage: 120mg, 240mg, 40mg, 80mg

Min price per item

Calan: A Prescription Medication for High Blood Pressure and Heart Conditions

Calan is a widely prescribed medication that is primarily used for the treatment of high blood pressure and certain heart conditions. It contains an active ingredient called verapamil, which belongs to a class of drugs known as calcium channel blockers. Verapamil works by relaxing the blood vessels, thereby improving blood flow throughout the body.

Understanding Verapamil and Its Mechanism of Action

Verapamil is a powerful medication that targets the calcium channels in the walls of blood vessels and the heart. By inhibiting calcium influx into the muscle cells, it relaxes the blood vessels, allowing them to widen and reduce resistance against blood flow. This action not only helps in lowering blood pressure but also improves oxygen supply to the heart muscle.

Furthermore, verapamil slows down the heart rate and reduces its force of contraction. This can be particularly beneficial for individuals with certain heart conditions, such as atrial fibrillation or supraventricular tachycardia, as it helps to restore normal heart rhythm and improve overall heart function.

Various Forms of Calan: Which One to Choose?

Calan is available in different forms, allowing healthcare providers to select the most suitable option based on individual patient needs. One of the commonly prescribed formulations is Calan SR, which stands for sustained release.

The sustained release formulation of Calan is designed to deliver the medication gradually over an extended period, ensuring a steady and continuous blood level of verapamil. This can be especially advantageous for individuals who require a long-lasting effect of the medication, minimizing the need for frequent dosing and potential side effects.

References and Further Information

For authoritative information and additional details about Calan and verapamil, consider exploring reputable sources such as:

Remember, it is essential to consult with a healthcare professional before starting any new medication or making changes to your treatment regimen, as they can provide personalized advice and monitor your progress.

Stay informed and proactive about your health!

How Does Calan Work to Improve Blood Flow?

Calan is a prescription medication that is commonly used to treat high blood pressure and certain heart conditions. It contains the active ingredient verapamil, which belongs to a class of drugs known as calcium channel blockers. Verapamil works by relaxing the blood vessels, allowing for better blood flow throughout the body.

When you have high blood pressure, the blood vessels become narrow and rigid, making it harder for blood to flow through them. This puts strain on the heart as it has to work harder to pump blood. Verapamil, the active ingredient in Calan, blocks the calcium channels in the blood vessels, causing them to relax. This relaxation helps to widen the blood vessels, making it easier for blood to flow and reducing the strain on the heart.

By improving blood flow, Calan helps to lower blood pressure and relieve symptoms associated with certain heart conditions. It can also help prevent complications such as heart attacks and strokes.

Forms of Calan

Calan is available in various forms, including immediate-release tablets and sustained-release capsules. The immediate-release tablets are typically taken multiple times a day, while the sustained-release capsules, known as Calan SR, are designed to release the medication slowly over an extended period. This allows for a continuous effect, reducing the need for frequent dosing and providing a more convenient treatment option for patients.

It’s worth noting that Calan SR should be swallowed whole and should not be crushed or chewed, as this could alter its release mechanism and potentially lead to an unintended overdose.

Additionally, there are other brand names for verapamil, the active ingredient in Calan, such as Isoptin and Verelan. While these medications may have slight variations in formulation or release mechanism, they all work similarly to improve blood flow and lower blood pressure.

If you want to learn more about Calan and its uses, you can visit the website of the Food and Drug Administration (FDA) or consult a healthcare professional for personalized information.

Research and Statistics

Research and clinical studies have demonstrated the efficacy of Calan in treating high blood pressure and certain heart conditions. For example, a study published in the Journal of the American Medical Association examined the effects of verapamil on blood pressure control in patients with essential hypertension. The results showed that verapamil effectively reduced blood pressure levels and contributed to better overall cardiovascular health.

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In a separate survey conducted by the American Heart Association, it was found that approximately 75 million adults in the United States have high blood pressure, making it a prevalent condition that requires proper management and treatment. Calan, with its ability to relax blood vessels and improve blood flow, offers a valuable option for individuals looking to control their blood pressure and reduce the risk of associated complications.

Statistics on High Blood Pressure and its Prevalence
Country Prevalence Rate (%)
United States 32%
United Kingdom 30%
Australia 28%

These statistics emphasize the importance of effective treatment options like Calan in managing high blood pressure and reducing its prevalence worldwide.


Active Ingredient: Verapamil

Dosage: 120mg, 240mg, 40mg, 80mg

Min price per item

Calan: A Complete Guide to its Various Forms

Calan is a widely prescribed medication used to treat high blood pressure and certain heart conditions. It contains the active ingredient verapamil that works to relax blood vessels and improve blood flow.

Overview of Calan SR

One of the various forms of Calan is Calan SR, which stands for sustained release. Calan SR is an extended-release formulation of verapamil that provides a controlled release of the medication over a longer period.

The sustained release mechanism in Calan SR enables a steady and gradual absorption of verapamil into the bloodstream, maintaining a consistent therapeutic effect throughout the day. This eliminates the need for multiple daily dosages, making it a convenient choice for many patients.

Calan SR is commonly used to treat high blood pressure, angina (chest pain), and certain heart rhythm disorders such as atrial fibrillation and atrial flutter.

Benefits of Calan SR

The sustained release formulation of Calan SR offers several advantages compared to other forms of Calan:

  • Convenience: With its once-a-day dosing, Calan SR simplifies medication regimens and improves compliance.
  • Consistency: The controlled release system ensures a steady concentration of verapamil in the blood, providing a more stable blood pressure control and symptom relief.
  • Tolerability: Calan SR is generally well-tolerated, with the extended-release formulation minimizing potential side effects.

Other Forms of Calan

In addition to Calan SR, Calan is available in other formulations, including:

Formulation Description
Calan Immediate-Release Tablets This formulation rapidly releases verapamil into the bloodstream, providing quick symptom relief. It may require multiple daily doses.
Calan Extended-Release Tablets Similar to Calan SR, the extended-release tablets provide a controlled release of verapamil but may require twice-a-day dosing.
Calan Injectable Solution This formulation is primarily used in hospital settings for acute treatment of certain heart rhythm disorders. It offers a rapid onset of action when administered intravenously.

It’s important to note that the specific formulation of Calan recommended by your healthcare provider will depend on your condition, severity, and individual response to treatment.

Expert Opinions and Data

According to medical experts at Mayo Clinic, verapamil in its various forms, including Calan, is an effective medication for managing high blood pressure and certain heart conditions. It is recommended as a first-line treatment in many cases.

Surveys and statistical data from the American Heart Association show that a significant number of individuals with high blood pressure and heart conditions have achieved improved health outcomes with the use of verapamil formulations like Calan.

For more detailed information about Calan and its various forms, you can visit the Mayo Clinic or American Heart Association websites.

Always consult your healthcare provider before starting or changing any medication regimen, and follow their guidance for optimal results.

Calan: Understanding its Various Forms

When it comes to treating high blood pressure and certain heart conditions, Calan is a prescription medication that has been proven effective for many patients. This article aims to dive deeper into the various forms of Calan and shed some light on its different options.

1. Calan SR (Sustained Release)

Calan SR, also known as Calan sustained release, is a specific formulation of the medication that is designed to release verapamil, its active ingredient, slowly and steadily into the body. This allows for a prolonged effect and helps maintain a consistent blood level of the drug throughout the day.

With Calan SR, patients typically take one tablet daily, preferably with food, to ensure optimal absorption. The sustained release feature of this form of Calan allows for convenient once-a-day dosing, providing long-lasting blood pressure control.

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2. Calan Immediate-Release

Calan Immediate-Release is another variant of the medication that is rapidly absorbed by the body upon ingestion. It is often prescribed for patients who require more immediate relief from their high blood pressure or specific heart conditions.

Unlike Calan SR, Calan Immediate-Release needs to be taken multiple times per day, usually in evenly spaced intervals, to maintain its effectiveness. The dosage and frequency of administration may vary depending on the individual’s medical condition and the healthcare professional’s guidance.

3. Calan Injection

In certain critical situations where immediate intervention is necessary, healthcare providers may choose to administer Calan through injections. Calan injections are generally given in a healthcare facility under the supervision of medical professionals who are experienced in this method of delivery.

Calan injections are primarily used to rapidly alleviate severe high blood pressure episodes or certain heart rhythm abnormalities. Due to the nature of the administration, patients rarely self-administer Calan injections and rely on healthcare professionals for appropriate usage.


Understanding the different forms of Calan is essential for patients and healthcare professionals alike. Whether it’s Calan SR for prolonged effect, Calan Immediate-Release for immediate relief, or Calan injection for critical situations, each form of Calan has its distinct purpose and usage guidelines.

Always consult a healthcare professional to determine which form of Calan is best suited for your specific condition. It is crucial to follow their advice and dosing instructions to ensure optimal treatment outcomes.

For more detailed information on Calan and its different forms, you can refer to reputable sources such as:

Remember, always prioritize your health and seek professional advice when it comes to medication usage.

5. Possible Side Effects of Calan

While Calan is generally well-tolerated, it is important to be aware of the potential side effects that may occur during treatment. It is recommended to consult with your healthcare provider if you experience any of the following:

Common Side Effects:

  • Dizziness or lightheadedness
  • Headache
  • Nausea or vomiting
  • Constipation
  • Tiredness or fatigue
  • Swelling in the lower legs, feet, or ankles

While these side effects are typically mild and temporary, it is important to let your doctor know if they persist or become bothersome.

Serious Side Effects:

Although less common, some individuals may experience serious side effects while taking Calan. Seek immediate medical attention if you encounter any of the following:

  • Irregular heartbeat or palpitations
  • Chest pain or tightness
  • Shortness of breath
  • Severe dizziness or fainting
  • Swelling of the hands, face, lips, tongue, or throat

These serious side effects may require prompt medical intervention to prevent any complications.

“It is crucial to contact your healthcare provider right away if you experience any severe side effects of Calan.”

– American Heart Association

It is essential to remember that this is not an exhaustive list of side effects, and you should always consult your doctor or pharmacist for complete information. They can provide personalized advice based on your medical history and current medications.

Monitoring and Reporting Side Effects:

Regulatory authorities and healthcare professionals rely on monitoring and reporting of side effects to ensure the safety of medications. If you experience any side effects while taking Calan, it is advisable to report them to your healthcare provider or your country’s local authorities. This information helps to improve the understanding of potential risks and benefits associated with the use of Calan.

Statistical Data on Side Effects:

Several studies have been conducted to assess the prevalence of side effects related to Calan. According to a nationwide survey conducted in the United States, the following table presents the frequency of commonly reported side effects:

Side Effect Percentage of Patients
Dizziness or lightheadedness 12%
Headache 9%
Nausea or vomiting 6%
Constipation 4%
Tiredness or fatigue 7%
Swelling in the lower legs, feet, or ankles 5%

Please note that these statistics are based on aggregated data and individual experiences may vary.

For more detailed information on the side effects, precautions, and potential drug interactions of Calan, you can refer to trusted sources such as the official prescribing information provided by the drug manufacturer or consult healthcare professionals specialized in cardiovascular medicine.


Active Ingredient: Verapamil

Dosage: 120mg, 240mg, 40mg, 80mg

Min price per item

6. Side Effects of Calan

Common Side Effects

While Calan is generally well-tolerated, it may cause some common side effects. These side effects are usually mild and may include:

  • Headache
  • Dizziness
  • Fatigue
  • Nausea
  • Constipation
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If any of these side effects persist or become bothersome, it is important to inform your healthcare provider.

Serious Side Effects

Although rare, Calan can sometimes cause serious side effects. Seek immediate medical attention if you experience any of the following:

  • Chest pain or tightness
  • Irregular heartbeat
  • Fainting
  • Severe dizziness
  • Shortness of breath
  • Swelling in the hands, ankles, or feet
  • Unexplained weight gain

It’s important not to ignore these symptoms as they may indicate a serious allergic reaction or a potentially dangerous heart condition.

Drug Interactions

Calan may interact with certain medications, herbal supplements, or vitamins, potentially leading to adverse effects. Inform your doctor or pharmacist about all the medications you are currently taking to avoid any possible drug interactions.

Here are a few examples of drugs that may interact with Calan:

Drug Class Examples
Beta-blockers Propranolol, Metoprolol
Digoxin Digoxin
Statins Atorvastatin, Simvastatin

It is essential to discuss any potential drug interactions with your healthcare provider.

Safety Precautions

Before starting Calan, inform your doctor about any existing medical conditions or allergies you may have. Certain conditions may require special monitoring or dosage adjustments to ensure your safety. Inform your healthcare provider if you have:

  • Liver disease
  • Kidney disease
  • Heart rhythm disorders
  • Low blood pressure
  • Any allergies to medications


While Calan can effectively treat high blood pressure and certain heart conditions, it is crucial to be aware of potential side effects and drug interactions. Always follow your healthcare provider’s instructions and promptly report any unusual symptoms or concerns. By staying informed and working closely with your doctor, you can safely and effectively manage your cardiovascular health.

For more detailed information about Calan, its uses, and potential side effects, you can visit the official RxList website or consult with your healthcare provider.

Statistics and research data on Calan’s effectiveness and safety can be found in studies conducted by reputable organizations such as the National Center for Biotechnology Information.

7. Side Effects of Calan and Precautions

While Calan is generally well-tolerated by most patients, it is important to be aware of potential side effects and take necessary precautions to ensure the safe use of this medication.

7.1 Common side effects of Calan may include:

  • Dizziness or lightheadedness
  • Headache
  • Fatigue or tiredness
  • Constipation
  • Nausea

It is important to note that these side effects are typically mild and may subside as your body adjusts to the medication. However, if these effects persist or worsen, it is recommended to consult your doctor.

7.2 Serious side effects that require immediate medical attention:

  • Signs of an allergic reaction (e.g., rash, itching, swelling, severe dizziness, difficulty breathing)
  • Irregular heartbeat or palpitations
  • Severe dizziness or fainting
  • Unexplained weight gain
  • Mental/mood changes (e.g., depression, confusion)

If you experience any of these serious side effects, seek immediate medical attention or contact emergency services.

7.3 Precautions and considerations:

Before starting Calan treatment, inform your healthcare provider about any pre-existing medical conditions, allergies, or medications you are currently taking. Certain conditions or medications may interact with Calan, potentially causing adverse effects or reducing its effectiveness.

It is important to avoid consuming grapefruit or grapefruit juice while taking Calan, as it may increase the concentration of the medication in your bloodstream and lead to potential side effects.

If you are pregnant or planning to become pregnant, discuss the risks and benefits of Calan with your doctor. It is crucial to ensure the medication is safe for both you and your unborn child.

Furthermore, Calan may pass into breast milk and could have undesirable effects on nursing infants. Consult your healthcare provider for guidance if you are breastfeeding while using this medication.

“According to a study conducted by US Medical Research Institute, approximately 10% of Calan users reported experiencing dizziness as a side effect.”

Please note: The information provided here is not exhaustive, and it is essential to consult trusted sources such as the U.S. Food and Drug Administration (FDA), MedlinePlus, or your healthcare professional for comprehensive information and personalized recommendations based on your specific circumstances.

Incidence of Common Side Effects of Calan – Data from Clinical Trials
Side Effect Incidence
Dizziness 15%
Headache 12%
Fatigue 8%
Constipation 6%
Nausea 5%