Are allergic to Calan SR, verapamil hydrochloride, or any of the inactive components used to make Calan SR. Your healthcare provider or pharmacist has a list of the inactive ingredients used to make Calan SR.

Have severe left ventricular dysfunction (the left side of your heart is weak or damaged).

Have sick sinus syndrome and do not have a pacemaker.

Have third- or second-degree heart block and do not have a pacemaker.

Have low blood pressure (hypotension), with your systolic blood pressure less than 90 mmHg.

Have Wolff-Parkinson-White syndrome or Lown-Ganong-Levine syndrome.

Are having a heart attack and have fluid in your lungs.

Calan SR Warnings and Precautions: Summary

There are several situations in which Calan SR should not be taken, along with a number of precautions and warnings people should be aware of with Calan SR. However, it is possible that not all of the warnings or precautions for Calan SR were discussed in this article. Therefore, you should talk with your healthcare provider about the Calan SR warnings or precautions that may apply to you.

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Calan SR Medication Information

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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD

Last reviewed by: Kristi Monson, PharmD

Calan SR

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Calan SR Warnings and Precautions

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