Breaking 5mg tablet in half

Am I okay to do this? I have a 5mg tablet however have a job interview and I'm very worried about it making me drowsy! Is it okay for me to half the tablet and take the 2.5 mg and leave the other half for another time?

I have taken 2mg previously (around a year ago) and it made me feel relaxed but not spaced out or anything so I think I'll be okay with 2.5mg.

Thank you to all responses in advance. :)

Yes....I do it all the time:)

Thank you for your reply. :)