Do not take TIKOSYN if you:
- Have an irregular heartbeat condition called long QT syndrome
- Have kidney problems or are on kidney dialysis
- Are allergic to dofetilide in TIKOSYN
- Take any of these medicines:
Cimetidine (Tagamet®, Tagamet HB®)
Verapamil (Calan®, Calan SR®, Covera-HS®, Isoptin®, Isoptin SR®, Verelan®, Verelan PM®, Tarka®)
Ketoconazole (Nizoral®, Xolegel®, Extina®)
Trimethoprim alone (Proloprim®, Trimpex®) or the combination of trimethoprim and sulfamethoxazole (Bactrim®, Septra®, Sulfatrim®)
Prochlorperazine (Compazine®, Compro®)
Hydrochlorothiazide alone or in combination with other medicines (such as Esidrix®, Ezide®, Hydrodiuril®, Hydro-Par®, Microzide®, or Oretic®)
Ask your doctor if you are not sure if any of your medicines are the kind listed above.
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