Effect of antipsychotic risperidone on presynaptic dopaminergic function

Effect of antipsychotic risperidone on presynaptic dopaminergic function - Effect of antipsychotic risperidone on presynaptic dopaminergic function

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000011428

Enrollment

Registered

2013-08-08

Start date

2013-09-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy male volunteer

Interventions

risperidone 2.0 mg p.o placebo p.o

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Healthy volunteers who do not have any psychiatric disorders or serious medical illnesses and who are able to understand an explanatory document and give consent are included in this study

Exclusion criteria

Exclusion criteria: -Psychiatric disorders including drug dependence -Serious medical illness

Design outcomes

Primary

Measure	Time frame
Change in dopamine transporter availability by single dose of risperidone and its relevance to performance in psychological test as well as brain functions measured by MRI	—

Countries

Japan

Contacts

Public ContactSusumu Tamoyama

National Institute of Radiological Sciences A study ethic plan support room

helsinki@nirs.go.jp043-206-3193

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026