anhedonia, withdrawal, negativism) and increased
arousal (i.e., insomnia, irritability, poor concentration,
hypervigilance). Psychiatric co-morbidities are
common, and PTSD sufferers can also present with
substance abuse, mood and other anxiety disorders,
impulsive and dangerous behavior, and self-harm.
In November 2018, Lundbeck and Otsuka reported
data from an explorative phase II study in PTSD, with
positive findings from the treatment arm that
examined a combination treatment of brexpiprazole
and sertraline. On basis of these data, Lundbeck and
Otsuka initiated two pivotal phase III trials
(NCT04124614; n=577 and NCT04174170; n=733),
investigating the use of brexpiprazole in combination
with sertraline in the treatment of PTSD, subsequent
to an End of Phase II meeting with the FDA in May
2019. The execution of those two ongoing studies
was challenged by the COVID-19 pandemic,
primarily impacting enrollment rates. After FDA
feedback, it was decided that the two trials will be
concluded with reduced sample size. Recruitment of
both studies concluded in April 2023 and headline
results are expected in the second half of 2023.
Aripiprazole – 2-Month Injectable (LAI)
formulation
In July 2019, Lundbeck and Otsuka initiated a pivotal
phase Ib study (NCT04030143) to determine the
safety, tolerability, and pharmacokinetics of multiple-
dose administrations of aripiprazole to adult
participants with schizophrenia or bipolar I disorder.
The study was an open-label, multiple-dose,
randomized, parallel-arm, multicenter study. In
addition to assessment of safety and tolerability, the
objective was to establish the similarity of aripiprazole
concentrations on the last day of the dosing interval
and the exposure in the last dosing interval following
the final administration of aripiprazole into the gluteal
muscle site. The study showed that the new 2-month
formulation provided effective plasma concentrations
of aripiprazole for two months, while being safe and
tolerable.
A long-acting injectable formulation ensures
continuous exposure to medication and through a
simplified treatment regimen, many of the challenges
with poor treatment adherence may be mitigated,
resulting in a potential positive impact on patient
outcomes.
The new 2-month formulation is an innovative
addition to the LAI franchise and has patent
protection until the early part of the next decade.
On April 27, 2023, Lundbeck and Otsuka announced
that the FDA has approved the New Drug Application
(NDA) for Abilify Asimtufii extended-release
injectable suspension for intramuscular use, a once-
every-two-months injection for the treatment of
schizophrenia in adults or for maintenance
monotherapy treatment of bipolar I disorder in adults.
Abilify Asimtufii offers two months of sustained
therapeutic concentrations with one dose.
Lundbeck and Otsuka submitted the Marketing
Authorisation Application (MAA) for aripiprazole as a
2-month ready-to-use (RTU) long-acting injectable
(LAI) for the maintenance treatment of schizophrenia
in adult patients stabilized with aripiprazole to the
European Medicines Agency (EMA) on May 26,
2022. Due to a CHMP procedural objection,
Lundbeck has withdrawn its MAA under the “hybrid”
procedure and intends to re-submit to EMA as soon
as possible under the “line-extension” procedure
instead. This change is procedural only, and
unrelated to product quality or safety.
The submission to Health Canada for the treatment
of schizophrenia and bipolar I disorder was submitted
in the third quarter of 2022 and Health Canada sNDS
was formally accepted for review on April 12, 2023.
Lu AG06466 (‘466) – phase Ib
’466 (formerly ABX1431) is an inhibitor of the
monoacylglycerol lipase (MAGL) and selective
modulator of the endocannabinoid system, and
thereby works to reduce excessive neuro-
transmission and neuroinflammation that are known
pathophysiological hallmarks for a range of
psychiatric and neurological disorders. Recruitment
in a phase Ib exploratory study in patients with PTSD
(NCT04597450) was finalized. This exploratory study
using biomarkers and clinical outcome measures will,
together with previous studies conducted in small
phase Ib patient populations, guide decision making