Bactrim
"I took this medicine for an acute bladder infection and the 3rd dose something happened. I went into a panic attack, had shortness of breath, was hyperventilating and my stomach was killing me so I was racing back to the ER and I was hallucinating. I kept seeing people jump out in front of me WHILE driving but there was no one there, it was dark but not too dark but I made it to the ER and I got in right away just from having a panic attack and hyperventilating. I have NO idea where this side effect came from it was the weirdest, scariest thing ever so the Doctor gave me Cipro which makes you feel awful. "