Rythmol Warnings and Precautions

Specific Precautions and Warnings With Rythmol

Some warnings and precautions to be aware of prior to taking this drug include the following:
  • In clinical studies, people who took antiarrhythmia medications similar to Rythmol after having a heart attack had a higher risk of death and of their heart stopping. It is unknown at this time whether Rythmol is associated with the same risk. However, it is important to make sure your healthcare provider knows if you have had a heart attack within the past two years.
  • Because of the risks associated with using this medication, it should only be used to treat life-threatening heart rhythm problems.
  • Rythmol can worsen heart rhythm problems or cause new problems, including a potentially life-threatening problem known as torsades de pointes. Your healthcare provider will monitor the electrical activity of your heart with an electrocardiogram (ECG) before and periodically during treatment.
  • There were reports of new or worsening heart failure in people taking Rythmol in clinical trials. Let your healthcare provider know if you develop signs of heart failure, or if you have heart failure and your symptoms become worse. Some of these symptoms may include:
    • Shortness of breath
    • Increased tiredness
    • Swelling of the legs, ankles, or feet.
  • If you have a pacemaker, it will need to be monitored and possibly reprogrammed during Rythmol treatment.
  • This medication may decrease the number of white blood cells in your blood, which could increase your risk for developing an infection. Let your healthcare provider know if you experience signs of an infection, such as:
  • Rythmol should be used cautiously in people with liver or kidney disease. These people may need to be monitored more closely and may require lower doses.
  • This medication may cause a positive antinuclear antibody (ANA) test result. An ANA test is used to screen for autoimmune disorders. Most people on Rythmol who developed an abnormal ANA test did not have symptoms of autoimmune disease. However, there is one report of Rythmol causing lupus, which resolved when the drug was stopped.
  • This medication may cause a short-term, small decrease in sperm count.
  • Rythmol has been reported to cause a worsening of myasthenia gravis symptoms. Myasthenia gravis is a disorder that causes weakness of the muscles. Let your healthcare provider know if you have this disorder, and if you do, be sure to report any worsening symptoms during treatment.
  • Rythmol is a pregnancy Category C medication. This means that it may not be safe for use during pregnancy (see Rythmol and Pregnancy).
  • Rythmol has been shown to pass through breast milk. Therefore, if you are breastfeeding or plan to start, discuss this with your healthcare provider prior to taking the drug (see Rythmol and Breastfeeding).
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Rythmol Medication Information

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