Should I wait to start? I have a work presentation in 9 days.

I just got the prescription (unsure how long the prior authorization process will take), but I have a work presentation in 9 days, next Sunday. We'll also be having a big company dinner that night as part of a summit. But, it's all happening only 5 minutes from my home. Is 7-9 days enough of a window? Or should I wait until after to start? Thank you!