There kinda are some medications that lessens or cancels stutter completely, but we each have different causes why we stutter. My case is social anxiety and anxiety in general. And I would not even suggest what I am taking for “special” occassions as it can cause you more problems than you have now, especially taking it 5days in a row. And I don’t believe there are harmless medications for that long of period to help with your stutter. I’m sorry!