"i started wellbutrin 5 days ago. the first night i felt like my heart was racing and pounding but it went away the next day. then at work for the past 2 days i have been sweating excessivley and getting the feeling that i need to sit. last night after taking the medication for 5 days i had the feeling that my head weighed a 1000 pounds and i just felt so dizzy, lightheaded, and weak i could barely walk right. i went to lay down to sleep and all of a sudden i couldn&#039;t swallow and was gasping for air. it was so scary. i just couldn&#039;t catch my breath. i could feel my throat closing up. i was rushed to e.r and they found i was having an allergic reaction to it."