What is Calan SR?
Calan SR is a brand name for sustained-release verapamil (a calcium-channel blocker). It’s used to treat certain heart and blood-vessel conditions, most commonly high blood pressure and some types of abnormal heart rhythms. [1]
What is “SR” in Calan SR?
“SR” stands for sustained release, meaning the medicine releases verapamil slowly over time so you usually take it less often than immediate-release forms. [1]
What is Calan SR used for?
Verapamil sustained-release products like Calan SR are prescribed for conditions such as:
- Hypertension (high blood pressure)
- Some supraventricular arrhythmias (abnormal rhythms originating above the heart’s ventricles)
Your exact indication depends on your diagnosis and the dose your clinician prescribed. [1]
How is Calan SR usually taken?
Dosing and timing are individualized, but sustained-release verapamil tablets are typically taken on a schedule prescribed by a clinician, often once daily depending on the formulation and your condition. Follow your prescription instructions exactly. [1]
What side effects do people ask about?
Common side effects linked to verapamil can include dizziness, constipation, headache, and swelling in the lower legs/feet. More serious effects can involve slow heart rate or blood pressure that’s too low. If you have chest pain, fainting, or severe shortness of breath, seek urgent medical help. [1]
Who should be cautious with Calan SR (drug interactions)?
Calan (verapamil) can interact with other medicines that affect heart rhythm and blood pressure, and it may interact with some drugs metabolized in the liver. People taking heart-rate–lowering drugs or certain cardiovascular medications should only combine them under clinician guidance. [1]
If you meant something else by “Calan SR”
“Calan SR” can also be confused with other brand names or similar spellings. If you tell me your country (or share a photo of the label/active ingredient), I can confirm the exact product and typical uses for your location.
Sources:
[1] https://www.drugs.com/cal-an-sr.html