Im sure you can.
Its an american product, and they have some pretty neat online pharmacies.
(
Dr Nick Riviera,
Tue 18 Nov 2003, 13:38,
archived)
Just found a review of Nyquil
and they say it's "the closest thing you'll find to Satan's urine"
(
WD-39,
Tue 18 Nov 2003, 13:43,
archived)