Hi, I recently quit marijuana about 10 days ago, and my psychiatrist put me on wellbutrin XL 300 mg. I have also been taking prozac 10 mg for about a year now too. Prior to starting wellbutrin, I was anxious and lost complete appetite it s been difficult to eat but i try my best to. However, I try to endure the anxiety but it is so overwhelming. How long does the side effect last? I know that wellbutrin has the potential to cause anxiety. I am also prescribed ativan sublingual and clonazepam R 0.5mg both are indicated as needed. However, in the past week i have been taking it daily because i feel that i need it. Please let me know how much longer these symptoms will last... or when I will stop feeling this.