Noun
A
synthetic
opioid
narcotic
analgesic
C
<
sub
>
22
sub
>
H
<
sub
>
28
sub
>
N
<
sub
>
2
sub
>
O
with
pharmacological
action
similar
to
morphine
that
is
administered
transdermally
as
a
skin
patch
and
in
the
form
of
its
citrate
C
<
sub
>
22
sub
>
H
<
sub
>
28
sub
>
N
<
sub
>
2
sub
>
O
ยท
C
<
sub
>
6
sub
>
H
<
sub
>
8
sub
>
O
<
sub
>
7
sub
>
is
administered
orally
or
parenterally
(
as
by
intravenous
or
epidural
injection
); ''
N
''
-phenyl-
''
N
''
-
[
1-
(
2-phenylethyl
)
piperidin-4-yl
]
propanamide
.