Anyone here tried period-delay tablets?

I’m thinking of taking period-delay tablets for the first time because I have an upcoming occasion and really don’t want my period during that time.

I’ve never taken them before and I’m having quite a few doubts—

Will it delay my next cycle?

How many days prior should i take it? , How to take it?

Are there any possible side effects?

Would really appreciate any advice ♥️

Thanks in advance