Bring BONINE, NOT dramamine. Bonine is a far more effective seasickness medication, ask your pharmacist.
I travelled on an NCL boat in the north atlantic several years ago, due to a late departure we ran at full speed with NO stabilizers out in 30ft seas(we were on deck three, I was looking UP at the waves). I kid you not, NCL staff was handing out Bonine like Pez. Fully 75% of the guests AND crew were sick, restaraunts/ bars and casino were EMPTY, people literally lying on the floor in common areas. At one point the ship was rocking 20degrees from vertical, side to side...plates sliding off tables etc.
made me laugh to hear people complaining about the MINOR swells on the wonder a few weeks back... but my wife had the bonine just in case!