... day due to concern with interaction with an antibiotic I was about to start, Levaquin. I took the Levaquin for 2 days and had terrible panic attack like side effect on 2nd day with chest tightness, dizzy, short breath so I quit taking right away. Since then I have had these smaller episodes of panic attacks with shortness of breath, chest tightness, some minor shaking, dizzy, etc 2-4 times a day. When those symptoms let up I feel very tired. Is this a side effect of coming off the steroid to quick and missing the last dose perhaps? This is day 4 off the use of it and no real improvement.