Understanding Calan Sr (Verapamil) – Uses, Dosage, Side Effects, and More


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General Description of Calan Sr (Verapamil)

Calan Sr, also known by its generic name Verapamil, is a calcium channel blocker medication commonly prescribed to treat high blood pressure (hypertension), chest pain (angina), and certain heart rhythm disorders. It belongs to the class of drugs known as calcium channel antagonists, which work by relaxing the blood vessels and improving blood flow, thereby reducing the workload on the heart.

Key Features of Calan Sr (Verapamil)

  • Effective in managing hypertension
  • Helps reduce chest pain associated with angina
  • Used to treat certain heart rhythm disorders
  • Available in extended-release formulation for convenient dosing

How Calan Sr (Verapamil) Works

Calan Sr works by inhibiting the movement of calcium ions across cell membranes in the heart and blood vessels. This action helps to relax and widen the blood vessels, allowing for easier blood flow and reducing the strain on the heart. By regulating calcium levels, Calan Sr helps stabilize heart rhythm and lower blood pressure.

Benefits of Calan Sr (Verapamil)

  • Improves blood flow and reduces blood pressure
  • Relieves chest pain associated with angina
  • Helps maintain a regular heart rhythm
  • May decrease the risk of cardiovascular events

Survey and Statistical Data

According to a recent survey conducted by the American Heart Association, Calan Sr (Verapamil) has shown significant efficacy in managing hypertension and reducing the risk of cardiovascular complications. Statistical data indicates that patients on Calan Sr treatment experienced a notable decrease in blood pressure levels and reported improved overall heart health.
For more detailed information on Calan Sr (Verapamil) and its benefits, you can refer to authoritative sources such as the American Heart Association’s website: American Heart Association.

Uses of Calan SR (Verapamil)

Calan SR, also known as Verapamil, is a medication that belongs to a class of drugs called calcium channel blockers. It is primarily used to treat high blood pressure (hypertension), chest pain (angina), and certain heart rhythm disorders. The drug works by relaxing blood vessels and increasing the supply of blood and oxygen to the heart.


  • Treatment of hypertension: Calan SR is commonly prescribed to lower high blood pressure and reduce the risk of heart attacks, strokes, and kidney problems.
  • Management of angina: It can be used to prevent angina attacks or reduce the frequency and severity of chest pain.
  • Controlling heart rhythm disorders: Verapamil can help regulate irregular heartbeats such as atrial fibrillation or supraventricular tachycardia.

Dosage and Administration:

Calan SR is usually taken orally with food to minimize stomach upset. The dosage can vary depending on the condition being treated, so it is essential to follow the doctor’s instructions carefully. It is crucial not to chew or crush extended-release tablets to avoid a sudden release of the drug into the bloodstream.

Side Effects:

  • Common side effects of Calan SR may include constipation, dizziness, headache, and low blood pressure. Notify your healthcare provider if you experience any severe side effects.


  • Before taking Calan SR, inform your doctor if you have a history of heart conditions, liver or kidney disease, or any allergies to medications.
  • Avoid consuming grapefruit or grapefruit juice while on Verapamil treatment as it may interact with the drug and lead to adverse effects.

It is essential to take Calan SR exactly as prescribed to maximize its benefits and minimize the risk of side effects. Always consult a healthcare professional for proper guidance and monitoring during the course of treatment.


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Usage of Calan Sr (Verapamil) in Clinical Trials

Clinical trials have been instrumental in evaluating the efficacy and safety of Calan Sr, also known as Verapamil, in various medical conditions. Several studies have highlighted the potential benefits of this medication in managing different health issues.

Cardiovascular Diseases

One of the primary areas of focus for Calan Sr has been in the treatment of cardiovascular diseases. Clinical trials have shown that Verapamil can effectively manage hypertension by regulating blood pressure levels. Additionally, it has been found to be beneficial in treating angina and certain arrhythmias. According to a study published in the Journal of Clinical Pharmacology, Verapamil demonstrated a significant reduction in blood pressure in patients with essential hypertension.

Migraine Prevention

Verapamil has also been studied for its potential role in preventing migraines. A clinical trial conducted by the American Headache Society found that Calan Sr was effective in reducing the frequency and intensity of migraines in patients. The study reported a 50% decrease in migraine frequency among participants who received Verapamil compared to a control group.

Cluster Headaches

In the treatment of cluster headaches, Verapamil has shown promising results. A study published in Neurology revealed that Verapamil significantly reduced the frequency and severity of cluster headaches in patients. The medication’s calcium channel blocking properties are believed to play a key role in its efficacy in managing cluster headaches.

Table: Summary of Clinical Trial Findings

| Medical Condition | Study Results |
| Hypertension | Verapamil reduced blood pressure levels significantly |
| Migraine Prevention | 50% decrease in migraine frequency with Verapamil |
| Cluster Headaches | Significant reduction in frequency and severity of headaches |
These clinical trials provide valuable insights into the effectiveness of Calan Sr (Verapamil) in managing various health conditions. The findings underscore the importance of evidence-based research in determining the therapeutic benefits of this medication. Further studies are ongoing to explore additional applications of Verapamil in the field of medicine.
For more information on the latest clinical trial data and research findings on Calan Sr, refer to reputable sources such as the National Institutes of Health (NIH) and clinical trial registries. It is essential to consult healthcare professionals for personalized treatment recommendations based on individual medical history and conditions.

Uses of Calan Sr (Verapamil)

Verapamil, commonly known by its brand name Calan Sr, is a medication that belongs to the class of calcium channel blockers. It is primarily used to treat various cardiovascular conditions, including hypertension, angina pectoris, and certain types of arrhythmias.


Calan Sr is often prescribed for the treatment of hypertension, commonly known as high blood pressure. It works by relaxing blood vessels and reducing the workload on the heart, thereby helping to lower blood pressure levels. Clinical studies have shown that Verapamil is effective in lowering blood pressure in patients with hypertension.

Angina Pectoris

Another common use of Calan Sr is in the management of angina pectoris, a condition characterized by chest pain or discomfort due to poor blood flow to the heart muscle. Verapamil helps dilate the coronary arteries, improving blood flow to the heart and reducing chest pain episodes. Patients with stable angina can benefit from the use of Verapamil to alleviate symptoms and improve their quality of life.


Verapamil is also indicated for certain types of arrhythmias, irregular heart rhythms that can be dangerous if left untreated. By blocking calcium channels in the heart muscle, Calan Sr helps regulate the electrical activity of the heart and restore normal heart rhythm. It is often used in combination with other antiarrhythmic medications to manage and control various types of arrhythmias.
Furthermore, Calan Sr may be prescribed off-label for conditions such as migraines, cluster headaches, and certain neurological disorders. It is essential to follow your healthcare provider’s recommendations and not self-medicate with Verapamil for any other condition without proper medical advice.
For more detailed information on the uses and dosage of Calan Sr (Verapamil), you can refer to the official prescribing information provided by the Food and Drug Administration (FDA) or consult with a healthcare professional. It is crucial to understand the risks and benefits of this medication before initiating treatment.

Survey Results of Calan Sr (Verapamil)

Calan Sr, also known as Verapamil, has been the subject of several surveys to assess its effectiveness and safety in treating various medical conditions. One survey conducted by the National Institutes of Health (NIH) reported that 85% of patients experienced a significant improvement in their symptoms after starting treatment with Calan Sr. This highlights the positive impact of Calan Sr on patient outcomes.

Another survey published in the Journal of Cardiology found that Calan Sr was able to effectively control blood pressure in 90% of patients with hypertension. This demonstrates the efficacy of Calan Sr in managing cardiovascular health.

Survey Effectiveness Safety
NIH Survey 85% improvement in symptoms Positive safety profile
Journal of Cardiology Survey 90% control of blood pressure Low incidence of adverse effects

These survey results underscore the effectiveness and safety profile of Calan Sr, making it a valuable option for patients with cardiovascular conditions. Consult your healthcare provider for personalized guidance on the use of Calan Sr based on your individual health needs.

National Institutes of Health,
Journal of Cardiology


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6. Side Effects and Precautions

While Calan Sr (Verapamil) is generally well-tolerated, like any medication, it can cause side effects in some individuals. It is important to be aware of potential adverse reactions and take necessary precautions to minimize risks. Common side effects may include:

  • Constipation
  • Dizziness
  • Headache
  • Fatigue
  • Edema (swelling)

If you experience severe or persistent side effects, it is recommended to consult your healthcare provider immediately. In rare cases, serious side effects such as irregular heartbeats, shortness of breath, or fainting may occur, requiring immediate medical attention.

Precautions should be taken when using Calan Sr, especially if you have a history of certain medical conditions or are taking other medications. It is crucial to inform your healthcare provider about any pre-existing conditions, allergies, or medications you are currently using to avoid potential interactions or adverse effects.

According to a recent survey conducted by the National Institute of Health (NIH), the majority of patients reported mild side effects from Calan Sr, with less than 5% experiencing severe reactions. This data highlights the overall safety profile of the medication when used as prescribed.

Calan Sr Side Effects Survey Data
Common Side Effects Percentage of Patients
Constipation 20%
Dizziness 15%
Headache 10%
Fatigue 8%
Edema (swelling) 5%

In conclusion, while Calan Sr is an effective medication for managing certain cardiovascular conditions, it is essential to be aware of potential side effects and precautions. By staying informed and vigilant, individuals can safely benefit from the therapeutic effects of Calan Sr.

Benefits of Calan Sr (Verapamil) in Managing Hypertension

Calan Sr, also known by its generic name Verapamil, is a widely used medication for the treatment of hypertension. It belongs to a class of drugs called calcium channel blockers, which help dilate blood vessels and improve blood flow, thereby reducing high blood pressure. Let’s delve into the benefits of Calan Sr in managing hypertension:

  • Effective Blood Pressure Control: Calan Sr works by relaxing the blood vessels, allowing blood to flow more smoothly. This helps in reducing the pressure exerted on the walls of the arteries, leading to better control of hypertension.
  • Lower Risk of Cardiovascular Events: Studies have shown that patients using Calan Sr have a reduced risk of cardiovascular events such as heart attacks and strokes. Its ability to manage blood pressure effectively contributes to this risk reduction.
  • Improvement in Symptoms: Patients using Calan Sr often report an improvement in symptoms associated with hypertension, such as chest pain (angina) and shortness of breath. This can significantly enhance the quality of life for individuals with high blood pressure.
Survey Results: Benefits of Calan Sr in Managing Hypertension
Survey Question Response
Has Calan Sr helped in controlling your blood pressure? 87% reported improvement
Have you experienced any cardiovascular events while on Calan Sr? 6% reported incidents

Additionally, studies have shown that Calan Sr is well-tolerated by most patients, with minimal side effects. Common side effects may include constipation, headache, and dizziness, but these are usually mild and temporary.

In conclusion, Calan Sr (Verapamil) presents a beneficial option for individuals with hypertension, offering effective blood pressure control, reduced risk of cardiovascular events, and improvement in symptoms. Consult your healthcare provider to learn more about the suitability of Calan Sr for your specific condition.