"i was initially prescribed what is commonly called paxil. it worked to relieve my depression and anxiety but the sexual side effects were too much so i asked for a change.  i was prescribed bupropion 150 mg extended.  my initial dose for 1 week was 150 mg 1x per day and then i was told i could increase to 2x a day or 300 mg.  when i went to the 300 mg dose i experienced side effects after a few weeks at this dose level. i experienced severe digestive issues, gas pain, severe constipation and nausea. i initially stopped taking the medicine but am going to give it another try at the 150mg dose."