<s>[INST] I have taken 4 doses of clarithronycin 500mg and have had sever headaches and shackness heart palpitations and anxity. I am going to stop taking it but is that safe? I have anxity as it is and have been panic attack free for almost a year and do not like the feeling and am afraid it will bring it back. [/INST] Hello, Your symptoms seem to be related to side effects of Clarithromycin. I suggest using anti inflammatory medications such as Tylenol for the headache. I suggest to stop the medication and you can consult your doctor about an an alternative antibiotic depending on the diagnosis. Hope my answer was helpful. If you have further queries feel free to contact me again. Regards, Dr. Dorina Gurabardhi, General & Family Physician </s>