I've noticed some physical symptoms that I didnt have before such as severe shortness of breath. Rapid heartbeat when exercising and I even collapsed one day in the heat and was told I may have had a seizure which I have never had any before. I know amphetamines can have serious consequences if used for long periods but I even had a physical after the seizure and my Dr extensively listened to my heart and I was given a clean bill of health. Im only 33! Any feedback would be greatly appreciated, Thanks