Guest guest Posted November 22, 2010 Report Share Posted November 22, 2010 My son is supposed to start erythromycin this week but the pharmacy called to say it counters with ketaconazole. The say it can cause the heart to start to beat too fast. That is freaking me out. I called Dr G's office and they said they are aware of the warning but have not found any occurances. I'm always scared of any new prescription I try just wanting to know if others have gone through this. Kathy Quote Link to comment Share on other sites More sharing options...
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