http://www.medications.com/effect/view/40460 I am on biaxin xl...2-500mg once a day. started it today and have nasty taste in my mouth, feel like my heart is pounding, mild headache, anxiety, increased salivation, increased urination....this sucks Thu, 30 Apr 2009 14:26:30 -0400 http://www.medications.com/effect/view/40460?item=19376 I had a very similar reaction. It is now 8 days since my last dose and those side-effects are lessening but still not entirely resolved. What is going on? http://www.medications.com/effect/view/40460?item=19376