I would suggest talking to the doctor who did  the proceedure as well as
your regular doctor, not the hospital.

Jeff

Jeff (commenting earlier) has the right of it.  The gastroenterologist
who performed the endoscopy needs to know about this.  The prep
for a colonoscopy or barium enema is such that the large bowel's
"production line" has been cleared of what you might call it's normal
intermediate steps in the progression from completely liquid material
(which passes from the small bowel into the cecum down in the
right lower quadrant of your abdomen) to formed stool in the
sigmoid colon (left lower quadrant and caudad).  

I hesitate to make any recommendations for fear that you'll fail to
contact your GE specialist or one of his/her associates, but in many
cases where a lower GI prep and study is followed by the sort of
diarrhea you're describing, I've had some success with the introduc-
tion of a stool normalizer such as calcium polycarbophil (see
http://www.gicare.com/pated/polycarbophil.htm), which is a syn-
thetic bulking agent (the calcium salt of polyacrylic acid crosslinked
with divinyl glycol) first marketed as Mitrolan and more commonly
known today as Fibercon.  It started out as a prescription drug,
but very soon went over-the-counter (OTC), and is available in
low-cost generic tablet forms.  Though commonly considered a
laxative, it's not (just as surfactant ["wetting"] agents like Colace
[sodium docusate] are not).  Because it is effectively a water-
soluble fiber, calcium polycarbophil tends less frequently to cause
flatulence than will the insoluble fiber supplements (oat bran,
psyllium - Metamucil - and suchlike).  

Taken appropriately (and I mean with low-dose introduction
and gradual ramp-up), I've been able to use calcium polycarbophil
to re-establish that "production line" in the large bowel for a number
of patients who had been thoroughly washed-out and were rolling
liquid content directly and rapidly from the ileocecal valve to the
anal ampulla, with resulting discomfort and frequent watery bowel
movements.  

But for ghod's sake, talk to your gastroenterologist (or even one
of his/her office nurses) about this before you do anything.  They
have seen more of this kind of problem than any GP will ever
have to manage, and I don't doubt that they'll be able to provide
effective recommendations for your relief.  

-----------------
Unless we put medical freedom into the Constitution, the time will
come when medicine will organize into an undercover dictatorship
to restrict the art of healing to one class of men and deny equal
privileges to others. The Constitution of this Republic should make
a special privilege for medical freedom as well as religious freedom.

    -- Benjamin Rush, M.D.

I've spoken to the hospital and they've said that it's unrelated to the
procedures (probably just a bug) or I would have had problems within
the
first 2 days. I've never had anything like this before - and I find it
difficult to believe it's just a coincidence. Are there any other
explanations? Any feedback appreciated.

Thanks,
John

The hospital may not provide you
with unbiased information.

This is serious.

Seek attention elsewhere.