hi now been on prozac for 31/2 weeks 20mg morning i have had every side effect going headaches muzzy head feelings terrible panoc attaks for the first weeks ending up in A&E but today i woke up feeling great no headache or muzzy head this has been slowly improving over the past week no panic attacks for a week feel quite normal today i now know that i have had panic and anxiety but still do not know where it came from i have been off work for 5 weeks had 2 weeks of betablockers but that did not do anything so if anyone is struggling with meds especially prozac stick with it i feel hopefully i have turned the corner