Drugs Home > Norpace CR Warnings and Precautions

Heart failure and severely low blood pressure are some of the potential warnings for people to be aware of during treatment with Norpace CR. Other precautions for using this drug safely include risks of potential drug interactions and possible concerns for women who are pregnant or nursing. If you have certain medical problems, such as heart block or congenital QT prolongation, you should not take Norpace CR.

What Should I Tell My Healthcare Provider?

You should talk with your healthcare provider prior to taking Norpace® CR (disopyramide) if you have:
  • Kidney disease, such as kidney failure (renal failure)
  • Liver disease, such as hepatitis, cirrhosis, or liver failure
  • Heart disease, such as congestive heart failure (CHF)
  • Had a heart attack in the past two years
  • Low blood pressure (hypotension)
  • Been told you have abnormal blood potassium levels (hyper- or hypokalemia)
  • Heart rhythm problems other than the problem for which you are taking Norpace CR), such as:
  • Wolff-Parkinson-White syndrome
  • A fast or slow heart rate
  • A heart problem known as QT prolongation or congenital long QT syndrome
  • Diabetes
  • Benign prostatic hypertrophy (BPH), also known as an enlarged prostate
  • Glaucoma or a family history of glaucoma
  • Myasthenia gravis (a nervous system disorder that causes muscle weakness)
  • Problems urinating (urinary retention)
  • Any allergies, including to foods, dyes, or preservatives.
Also, let your healthcare provider know if you are:
  • Pregnant or thinking of becoming pregnant
  • Breastfeeding.
You should also tell your healthcare provider about all other medications you are taking, including prescription and nonprescription medicines, vitamins, and herbal supplements.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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