Can i miss 40 mg daily dose of fluoxetine for 4 days straight?

Shouldn't : Fluoxetine should be taken regularly, missing medications wouldn't be advised . Symptoms can worsen if medications are not taken regularly and it can take up to 6 weeks for mood to become normal.

Not good: Medically, it is unlikely to be dangerous. However, there is a substantial risk of your getting a "discontinuation syndrome" or at least the temporary symptoms of it. The symptoms are quite miserable: nerve sensations, flu-like feelings, anxiety, depression. If you resume within four days, there is a good chance that the symptoms will stop quickly.