Filgrastim, sold under the brand name Neupogen among others, is a medication used to treat low blood neutrophils due to a number of causes. This includes when it occurs following chemotherapy, radiation poisoning, HIV/AIDS, or is of unknown cause.
Bradycardia and heart block occur in 1 to 3 percent of patients receiving amiodarone. 2 Amiodarone-induced proarrhythmia occurs at an annual rate of less than 1 percent.
The Side Effects of Amiodarone. The side effects of amiodarone often take weeks or months (or even years) to develop, so anyone taking this drug must be vigilant as long as the drug is used. Furthermore, the side effects of amiodarone tend to be very unusual for antiarrhythmic drugs - or for any drug, for that matter.