A method for preventing and/or alleviating a psychiatric disorder, and/or
effectuating sedation, comprising administering a benzylisoquinoline
derivative represented by General Formula (I): wherein R.sup.1, R.sup.2,
R.sup.3 and X each represent a particular group; a method for preventing
and/or alleviating a particular symptom, comprising administering a
bisbenzylisoquinoline derivative represented by General Formula (II):
wherein R.sup.7, R.sup.8, R.sup.9, R.sup.10 and R.sup.11 each represent a
particular group, and a health food containing said derivative
represented by General Formula (I) or (II).