i don't know if anyone remembers the alupent inhaler, but it was pretty metallic tasting. and i puked up bactrim once, it was horrible.
the worst ever, though, was the barium (sp?) i had to drink 16 oz of before a cat scan. it was so gross it was funny. they tell you it's really nasty, but you never quite understand until the first sip.
they told me to chug it. and i did, but the second it hit my throat, i gagged and the nusre almost wore it. i caught it and ended up wearing it myself. so gross!!!