I got a buff icon when I tested this, but as you say, no effect.
This is because the 'Spell Duration Formula' (15) used by this spell is not implemented in EQEmu.
This is handled in Rev 1860, but just uses the default duration from the spell (20 minutes). I did find some old data on the duration of the I to X potions (11 to 20 minutes) here:
http://mboards.eqtraders.com/eq/show...l=1#post180020 and here
http://crucible.samanna.net/viewtopi...t=2014&start=0
but couldn't find anything on versions XI through XIV. If anyone knows what the duration of those potions are (i.e. does it follow the existing pattern, so 21 minutes for XI, 22 for XII etc), I can fix the duration formula.