Does anyone else take the anti-nauseant dimenhydrinate (brand names Gravol or Dramamine) often?

I've had inner ear problems and lots of nausea for years, so I have needed to take anti-nauseants on a semi-regular basis. I usually take dimenhydrinate because it's cheap and available OTC and it works quite well. I sometimes take one when I can't fall asleep at night too.

Anyway, I have noticed that after I take it, every single time, I get HUGE, puffy circles under my eyes the next day and they last for a couple of days. I took one last night and at work today everyone was asking me if I was okay and telling me I look exhausted. I never get puffiness like this unless I take dimenhydrinate. It seems like a very odd side effect. I remember it happening all the time when I was in junior high too. I had an ulcer then and took dimenhydrinate for the nausea.

Has anyone else had this happen? Any idea why this would happen? Dimenhydrinate is an antihistamine, but other antihistamines like benadryl don't make my eyes puffy... and other anti-nauseants like compazine and phenergan don't either.

P.S. Pepto Bismol always turns my tongue black. It looks like I sucked on a black marker, but I can get rid of most of it by vigorously brushing my tongue with my toothbrush. Anyone else experience this?