I was prescribed itraconazole 100 mg from accord. After taking the first dose of 200 mg I got scared of possible side effects on my heart and I stopped using this drug. Now, 5 days later I experience shortness of breath and quick fatigue and i'm wondering if this is still a side effect from this drug. I had a heart rhythm disorder before taking the drug but it was diagnosed as harmless. My blood pressure and heart frequency are normal. Is it possible that my symptoms come from itraconazole? Will it just be temporary and I should wait for some day for it to stop or should I go to a doctor immediately?