Publications by authors named "Kei Watabe"
Article Synopsis
- A public workshop took place in Japan to discuss the ICH E17 guideline aimed at improving how pharmaceuticals are tested and understood across different populations.
- Key topics included examining the intrinsic and extrinsic ethnic factors affecting treatment results and the importance of a comprehensive assessment of treatment consistency.
- The workshop emphasized the need for open communication about these evaluations among regulatory authorities, sponsors, and other stakeholders to enhance the guideline's implementation.
Aim: This study aimed to examine symptom changes during short-term discontinuation of antipsychotics up to 3 weeks including the placebo washout phase in acute schizophrenia.
Methods: The data from three double-blind, randomized, controlled trials comparing lurasidone versus placebo in patients with acute exacerbation of schizophrenia were analyzed. Symptom severity was assessed using the Positive and Negative Syndrome Scale (PANSS) total and the Clinical Global Impression-Severity scale (CGI-S) scores.
Purpose: To evaluate the effectiveness and safety of lurasidone 80 mg/day (versus the 40 mg/day dose) during a 12-week, open-label extension study in patients with an acute exacerbation of schizophrenia who had completed a 6-week double-blind study of lurasidone.
Patients And Methods: A total of 289 adult patients with schizophrenia completed the double-blind study and enrolled in the 12-week extension study. Lurasidone was flexibly dosed at 40 or 80 mg/day.
Background: Lurasidone has demonstrated efficacy for short-term treatment of bipolar depression in a diverse ethnic population including Japanese. This study evaluated the long-term safety and effectiveness of open-label lurasidone treatment in these patients.
Methods: Patients for this 28-week extension study were recruited from those who completed a 6-week double-blind study of lurasidone, 20-60 mg/day, lurasidone 80-120 mg/day, and placebo.
Aim: Previous studies conducted primarily in the USA and Europe have demonstrated the efficacy and safety of lurasidone 20-120 mg/day for the treatment of bipolar I depression. The aim of the current study was to evaluate the efficacy and safety of lurasidone monotherapy for the treatment of bipolar I depression among patients from diverse ethnic backgrounds, including those from Japan.
Methods: Patients were randomly assigned to double-blind treatment for 6 weeks with lurasidone, 20-60 mg/day (n = 184) or 80-120 mg/day (n = 169), or placebo (n = 172).
Background: Blonanserin is a second-generation antipsychotic used for the treatment of schizophrenia. This study determined the efficacy, safety and pharmacokinetics of a blonanserin transdermal patch in patients with acutely exacerbated schizophrenia.
Methods: This double-blind, multicenter, phase 3 study consisted of a 1-week observation period during which patients were treated with two patches of placebo, followed by a 6-week double-blind period where patients were randomized (1:1:1) to receive once-daily blonanserin 40 mg, blonanserin 80 mg, or placebo patches.
Objective: To assess the effect of dose increase in adult patients with schizophrenia who demonstrate inadequate initial response to standard-dose lurasidone and to evaluate the efficacy of low-dose lurasidone in adult patients with schizophrenia.
Methods: In this randomized, double-blind, placebo-controlled study conducted between May 2013 and June 2014, hospitalized patients with acute schizophrenia (DSM-IV-TR criteria) were randomly assigned to double-blind treatment with lurasidone 20 mg/d (n = 101), lurasidone 80 mg/d (n = 199), or placebo (n = 112). Nonresponders to lurasidone 80 mg/d (Positive and Negative Syndrome Scale [PANSS] score decrease < 20%) at 2 weeks were re-randomized to lurasidone 80 mg/d or 160 mg/d for the remaining 4 weeks of the study.