Akathisia has previously been reported to exacerbate psychopathology and to
be associated with noncompliance, suicidality, and violence. One previous
study found brisk decrements in psychopathology after acute treatment of ak
athisia with intramuscular biperiden. This study assessed changes in akathi
sia and psychopathology in 19 patients after separate one-day treatments wi
th intramuscular benztropine and oral propranolol. Benztropine and proprano
lol led to clinically meaningful and statistically significant decrements i
n ratings of subjective and objective measures of akathisia and in psychopa
thology scores. Changes in psychopathology correlated significantly with ch
anges in subjective measures of akathisia after benztropine and with subjec
tive and objective measures of akathisia after propranolol. Changes in akat
hisia accounted for 9%-42% of the variance in changes in psychopathology. A
fter treatment, statistically significant decrements in Brief psychiatric R
ating Scale (BPRS) positive symptoms were noted, and individual items not d
irectly related to the akathisia syndrome, such as conceptual disorganizati
on, hallucinatory behavior, and unusual thought content declined, although
not significantly. These findings, taken together with the results of a sim
ilar previous study, indicate that the effect of akathisia in exacerbating
psychopathology is large. If suspected, akathisia should be treated promptl
y.