The extent of absorption and other pharmacokinetic parameters of dextr
omoramide following sublingual administration were assessed in five pa
tients receiving chronic opioid analgesia. The use of the standard 5 m
g tablet formulation was associated with negligible absorption in two
patients, a prolonged time to peak concentration in the other three an
d substantial variability in clearance. The study concluded that the s
tandard tablet formulation cannot be recommended for sublingual use wh
ere reliable, rapid onset analgesia is required.