Drugs Home > Norpace CR Side Effects

It can be difficult to know whether you will develop side effects with Norpace CR if you have never taken the medication before. However, extensive clinical studies have shown that dry mouth, difficulty urinating, and constipation are some of the most commonly reported problems. There are also some potentially serious reactions, such as hallucinations and confusion, that require immediate medical care.

An Introduction to Norpace CR Side Effects

As with any medicine, Norpace® CR (disopyramide) can cause side effects. However, not everyone who takes the medication will have problems. In fact, many people tolerate it quite well. If side effects do occur, in many cases, they are minor and either require no treatment or are treated easily by you or your healthcare provider. Serious side effects are less common.
(This article covers many, but not all, of the possible side effects with Norpace CR. Your healthcare provider can discuss a more complete list with you.)

Common Side Effects of Norpace CR

Norpace CR has been studied extensively in clinical trials. In these studies, the side effects that occurred in a group of people taking the drug were carefully documented. As a result, it was possible to see what side effects occurred and how often they appeared.
In clinical studies, the most common Norpace CR side effects included:
  • Dry mouth -- in up to 32 percent of people
  • Difficulty urinating -- up to 14 percent
  • Constipation -- up to 11 percent.
Other common reactions, occurring in 3 percent to 9 percent of people, included:
  • Blurred vision
  • Dry nose, eyes, or throat
  • An inability to empty the bladder completely when urinating (urinary retention)
  • Feeling the need to urinate frequently or urgently
  • Nausea
  • Abdominal (stomach) pain, bloating, or gas
  • Dizziness
  • Muscle weakness
  • Fatigue
  • Headache
  • General feelings of illness
  • General body aches and pains.
Other common side effects, occurring in 1 percent to 3 percent of people, included:
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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