As disclosed herein, co-administration of pimavanserin with an agent that
ameliorates one or more cholinergic abnormalities can have a synergistic
effect on the efficacy of the agent. Disclosed herein are compositions
which include pimavanserin in combination with an agent that ameliorates
one or more cholinergic abnormalities. Also disclosed herein are methods
for ameliorating or treating a disease condition characterized by one or
more cholinergic abnormalities that can include administering
pimavanserin in combination with an agent that ameliorates one or more
cholinergic abnormalities.