Prozac side effects are real—here's what you need to know if you're taking the antidepressant medication. How to use Prozac. Read the Medication Guide provided by your pharmacist before you start using fluoxetine and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Yesterday was my 3rd day taking 20mg of Prozac prescribed by the doctor for depression and major anxiety and panic attacks. I am 19 years old. How to Stop Taking Wellbutrin. Wellbutrin, or bupropion, is classified as an antidepressant and is usually used to treat depression—though, the drug is also used as a smoking cessation aid under the name Zyban. Since Wellbutrin affects b. Long-term use of the medications is surging in the United States, according to an analysis by The Times. One reason: withdrawal symptoms that make it difficult to stop. When depression symptoms improve after starting an antidepressant, many people need to continue taking medication long term to prevent symptoms from returning. Fluoxetine (Prozac) is used to treat depression, obsessive-compulsive disorder (bothersome thoughts that won't go away and the need to perform certain actions over and over), some eating disorders, and panic attacks (sudden, unexpected attacks of extreme fear and worry about these attacks). I have PTSD, depression and anxiety. I've been on Prozac for years and in March switched to Wellbutrin. I began having bad headaches, fuzzy thinking and just didn't feel right. Prozac, or fluoxetine, is an antidepressant in a class known as selective serotonin reuptake inhibitors (SSRIs). This class of medications are the most commonly prescribed antidepressants. Prozac can be prescribed to treat several conditions, such as depression, panic attacks, obsessive compulsive disorder, bulimia nervosa, and. If you stop taking Prozac abruptly, you may experience symptoms related to balance, such as vertigo, lightheadedness and dizziness. You may also develop some sensory symptoms, such as numbness or tingling in parts of your body or a feeling of a mild electric shock. .