I feel a headache coming on and I'm drinking tonight! Should I take pills or is this bad?

Hi everyone. I plan on going out for new year's eve and I feel a headache coming on already! I am a bit wary of taking pills for it because I've heard pills can cause liver damage and an upset stomach if you drink on them (And trust me, I am going to drink a lot tonight, so I don't need the added nausea or liver damage!) Would one time be okay, or can you think of anything else? Really not sure how big of a deal it is. Thanks.