Can sevredol or concussion cause attacks with shortness of breath, blurred vision and feeling like youre going to collapse or pass out?

Yes: Yes those symptoms can occur with a concussion. Best to see doctor with experience in evaluating and treating patients with a concussion or post concussion symptoms.

Maybe: A concussion could cause blurred vision and feeling like your are going to collapse but not shortness of breath. Depending on the relation of when you take the sevredol this may be a reaction and discuss with your doctor./side effect of the medication. Stop the sevredol and see your GP.

Yes, possibly: Concussions can cause a number of direct and indirect symptoms. Lightheadedness and visual changes occur frequently as issues with the vestibular system, and shortness of breath can occur because of the anxiety around the other symptoms. Sevredol notably can also cause symptoms, and it is not the best drug to be taking if you have a history of concussion. See your MD for further discussion.