Tikosyn Side Effects

Contact your healthcare provider immediately if you are taking Tikosyn and develop unexplained swelling, severe diarrhea, or other potentially serious side effects. Tikosyn can also cause common problems, such as headaches, nausea, and problems sleeping. If you develop anything that doesn't seem right during treatment, discuss the matter with your healthcare provider.

An Introduction to Tikosyn Side Effects

Just like any medicine, Tikosyn® (dofetilide) can cause side effects. It is an antiarrhythmic, so Tikosyn can cause very serious side effects, which is why it is reserved for cases involving severe symptoms. Fortunately, many adverse reactions are minor and either require no treatment or are treated easily by you or your healthcare provider.
(This article covers many, but not all, of the possible side effects with Tikosyn. Your healthcare provider can discuss a more complete list with you.)

Common Side Effects of Tikosyn

Tikosyn has been studied extensively in clinical trials. In these studies, the side effects that occurred in a group of people taking the drug were documented and then compared to those that occurred in a similar group of people taking a placebo (a "sugar pill" that does not contain any active ingredients).
In these studies, the most common Tikosyn side effects included:
  • An abnormal heartbeat -- in up to 15.8 percent of people
  • Headache -- up to 11 percent
  • Chest pain -- up to 10 percent
  • Dizziness -- up to 8 percent
  • Respiratory tract infection (such as the common cold) -- up to 7 percent
  • Shortness of breath -- up to 6 percent
  • Nausea -- up to 5 percent
  • Flu-like symptoms -- up to 4 percent
  • Insomnia (sleeping problems) -- up to 4 percent.
Other common reactions, occurring in 2 percent to 3 percent of people, included:
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Tikosyn Drug Information

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