• Number of Participants Reporting One of More Treatment-Emergent Adverse Event (TEAE) [ Time Frame: Baseline to Day 225 ]
  An Adverse Event (AE) is defined as any untoward medical occurrence in a clinical trial where the participant is administered a medical product; it does not necessarily have a causal relationship with this treatment. A TEAE is defined as an adverse event with an onset that occurs after receiving study drug.
• Number of Participants With a Markedly Abnormal Vital Signs Measurement [ Time Frame: Baseline to Day 225 ]
  Vital signs will include systolic and diastolic blood pressure, heart rate, and body temperature.
• Number of Participants With a Markedly Abnormal Electrocardiogram (ECG) Result [ Time Frame: Baseline to Day 225 ]
  The number of participants with any markedly abnormal electrocardiogram (ECG) collected throughout study
• Number of Participants With a Markedly Abnormal Clinical Laboratory Assessments [ Time Frame: Baseline to Day 225 ]
  The number of participants with any markedly abnormal standard safety laboratory values collected throughout study.
• Number of Participants With a Markedly Abnormal Physical Examinations [ Time Frame: Baseline to Day 225 ]
  The number of participants with any markedly abnormal physical examination results collected throughout study
• Mean Change From Baseline in Simpson-Angus Scale Neurologic Rating Scale (SAS) [ Time Frame: Baseline to Day 225 ]
  To assess the extrapyramidal symptoms. The SAS consists of a list of 10 symptoms of Parkinsonism (gait, arm dropping, shoulder shaking, elbow rigidity, wrist rigidity, head rotation, glabella tap, tremor, salivation, and akathisia). Each item will be rated on a 5-point scale, with a score of 1 representing absence of symptoms and a score of 5 representing a severe condition. The cumulative score will range from 10 to 50.
• Mean Change From Baseline in Abnormal Involuntary Movement Scale (AIMS) [ Time Frame: Baseline to Day 225 ]
  To assess the extrapyramidal symptoms. The AIMS assessment consists of 10 items describing symptoms of dyskinesia. Facial and oral movements (items 1 through 4), extremity movements (items 5 and 6), and trunk movements (item 7) will be observed unobtrusively while the participant is at rest (eg, in the waiting room), and the investigators will also make global judgments on the participants dyskinesias (items 8 through 10). Each item will be rated on a 5-point scale, with a score of 0 representing absence of symptoms (for item 10, no awareness), and a score of 4 indicating a severe condition (for item 10, aware/severe distress). The cumulative score will range from 0 to 40.
• Mean Change From Baseline in Barnes Akathisia Rating Score (BARS) [ Time Frame: Baseline and Day 225 ]
  To assess the extrapyramidal symptoms. The BARS consists of 4 items related to akathisia: objective observation of akathisia by the investigator, subjective feelings of restlessness by the participant, participant distress due to akathisia, and global evaluation of akathisia. The first 3 items will be rated on a 4-point scale, with a score of 0 representing absence of symptoms and a score of 3 representing a severe condition. The global clinical evaluation will be made on a 6-point scale, with 0 representing absence of symptoms and a score of 5 representing severe akathisia.
• Mean Change From Baseline in Visual Analog Scale (VAS) Pain Perception Scores After The Last Dose [ Time Frame: 2M LAI: Baseline to Day 169; 1M depot injection: Baseline to Day 197 ]
  Participants will assess the perceived pain at the injection site associated with the injection of IMP using a visual analog scale (VAS). Participants randomized to 2M LAI will receive the last dose on Day 169, while participants randomized to 1M depot injection will receive the last dose on Day 197.
• Mean Change From Baseline in Investigators Assessment of The Injection Site Score After The Last Dose [ Time Frame: 2M LAI: Baseline to Day 169; 1M depot injection: Baseline to Day 197 ]
  The investigators or designees will assess the injection site. Participants randomized to 2M LAI will receive the last dose on Day 169, while participants randomized to 1M depot injection will receive the last dose on Day 197.
• Mean Change From Baseline in Columbia-Suicide Severity Rating Scale (C-SSRS) [ Time Frame: Baseline to Day 225 ]
  Suicidality will be monitored during the trial using the C-SSRS. The scale consists of a baseline evaluation that assesses the lifetime experience of the participant with suicide events and suicidal ideation and a post baseline evaluation that focuses on suicidality since the last assessment.
• Plasma Concentration of Aripiprazole on Day 225 [ Time Frame: Day 225 ]
• Area Under the Plasma Concentration-Time Curve From Time 0 to 28 Days (AUC0-28) Post 7th and 8th Dose of Aripiprazole (1M depot injection) [ Time Frame: 0-12 hours post dose on Days 169 and 197, and on Days 170, 171, 173, 176, 178, 181, 183, 186, 190, 198, 199, 201, 204, 206, 209, 211, 214, 218 and 225 ]
  Participants randomized to 1M depot injection will receive the 7th and 8th dose on Days 169 and 197 respectively.
• Area Under the Plasma Concentration-Time Curve From Time 0 to 56 Days (AUC0-56) Post Last Dose of Aripiprazole (2M LAI) [ Time Frame: 0-12 hours post dose on Day 169, and on Days 170, 171, 173, 176, 178, 181, 183, 186, 190, 197, 204, 211, 218 and Day 225 ]
  Participants randomized to 2M LAI will receive the last dose on Day 169.

• Maximum Observed Plasma Concentration (Cmax) of Aripiprazole [ Time Frame: 2M LAI: 0-12 hours post dose on Day 1 and 169; 1M depot injection: 0-12 hours on Day 1, 169 and 197 ]
  Cmax will be measured after the 1st and 4th dose of aripiprazole 2M LAI and after the 1st, 7th and 8th dose of aripiprazole 1M depot injection.
• Time to Reach the Maximum Plasma Concentration (Tmax) of Aripiprazole [ Time Frame: 2M LAI: 0-12 hours post dose on Day 1 and 169; 1M depot injection: 0-12 hours on Day 1, 169 and 197 ]
  Tmax will be measured after the 1st and 4th dose of aripiprazole 2M LAI and after the 1st, 7th and 8th dose of aripiprazole 1M depot injection.
• Area Under the Plasma Concentration-Time Curve From Time 0 to 28 Days (AUC0-28) Post First Dose of Aripiprazole (1M depot injection) [ Time Frame: 0-12 hours post first dose on Day 1, and Days 2, 3, 5, 8, 10, 13, 15, 18, 22, and 29 ]
• Area Under the Plasma Concentration-Time Curve From Time 0 to 56 Days (AUC0-56) Post First Dose of Aripiprazole (2M LAI) [ Time Frame: 0-12 hours post first dose on Day 1, and Days 2, 3, 5, 8, 10, 13, 15, 18, 22, 29, 36, 43, 50 and 57 ]
• Plasma Concentration of Aripiprazole 28 Days (C28) Post First Dose (1M depot injection) [ Time Frame: Day 29 ]
• Plasma Concentration of Aripiprazole 56 Days (C56) Post First Dose (2M LAI) [ Time Frame: Day 57 ]
• Area Under the Plasma Concentration-Time Curve From Time 0 to 28 Days (AUC0-28) Post Last Dose for Aripiprazole (2M LAI only) [ Time Frame: 0-12 hours post last dose on Day 169, and on Days 170, 171, 173, 176, 178, 181, 183, 186, 190, and 197 ]
• Plasma Concentration of Aripiprazole 28 to 56 Days (C28) Post Last Dose (2M LAI only) [ Time Frame: Day 197 to 225 ]
  Participants receiving 2M LAI will receive the last dose on Day 169.
• Peak-to-Trough Percent Fluctuation (PTF%) After the Last Dose of Aripiprazole [ Time Frame: 2M LAI: 0-12 hours post dose on Day 169, and at multiple time points from Day 170 to Day 255; 1M depot injection: 0-12 hours post dose on Day 197 and at multiple timepoints from Day 198 to 225 ]
• Plasma Concentration of Aripiprazole 14 Days (C14) Post First Dose (1M depot injection) [ Time Frame: Day 15 ]
• Plasma Concentration of Aripiprazole 7 Days (C7) Post First Dose (2M LAI) [ Time Frame: Day 8 ]
• Change from Baseline in Positive and Negative Syndrome Scale Rating Criteria (PANSS) [ Time Frame: Baseline to Day 225 ]
  The PANSS consists of 3 subscales containing a total of 30 symptoms constructs developed to asses both the positive and negative symptom of participants with schizophrenia. For each symptom constructs, severity is rated on a 7-point scale, with a score of 1 indicating the absence of symptoms and a score of 7 indicating extremely severe symptoms. The cumulative score ranges from 30 to 210.
• Change from Baseline in Clinical Global Impression - Severity Scale (CGI-S) [ Time Frame: Baseline to Day 225 ]
  The CGI-S is a 7-point scale used to measure the severity of illness for each participant. Response choices include: 0 = not assessed; 1 = normal, not ill at all; 2 = borderline mentally ill; 3 = mildly ill; 4 = moderately ill; 5 = markedly ill; 6 = severely ill; and 7 = among the most extremely ill participants.
• Change from Baseline in Clinical Global Impression - Improvement Scale (CGI-I) [ Time Frame: Day 57 to Day 225 ]
  The CGI-I scale measures the improvement of illness for each participant. Response choices include: 0 = not assessed, 1 = very much improved, 2 = much improved, 3 = minimally improved, 4 = no changed, 5 = minimally worse, 6 = much worse, and 7 = very much worse.
• Change from Baseline in Subjective Well-Being Under Neuroleptic Treatment-Short Form (SWN-S) [ Time Frame: Baseline to Day 225 ]
  The SWN-S is a participant self-rated scale developed to evaluate the participants perception of well-being while receiving antipsychotic medication. The questionnaire consists of 20 items and 5 subscales (mental functioning, social integration, emotional regulation, physical functioning, and self control). For items marked with a '+', items are rated 1 = not at all to 6 = very much. For items marked with a '-' items are rated 1 = very much to 6 = hardly at all. Total possible scores range from 20-120.
• Change from Baseline in Montgomery-Asberg Depression Rating Scale (MADRS) [ Time Frame: Baseline to Day 225 ]
  The MADRS measures symptoms of depression and is administered using a structured interview guide. The scale consists of 10 items, each with 7 defined grades of severity (0-6). Total scores ranges from 0-60 and a higher score indicates more depressive symptoms.
• Change from Baseline in Young Mania Rating Scale (YMRS) [ Time Frame: Baseline to Day 225 ]
  The YMRS is an 11-item, multiple-choice diagnostic questionnaire which psychiatrists use to assess the core symptoms of mania and is based on the participants subjective report of their condition. There are four items that are graded on a 0 to 8 scale (irritability, speech, thought content, and disruptive/aggressive behavior), while the remaining seven items are graded on a 0 to 4 scale. Total score is summed of 11 items. Total score rage is from 0 to 60 and the higher score represent a worse outcome.
• Change from Baseline in Clinical Global Impression - Bipolar Version (CGI-BP) [ Time Frame: Baseline to Day 225 ]
  The CGI-BP scale refers to the global impression of the participants with respect to bipolar disorder. The scale rates the participant's severity of illness (CGI-BP-Severity: mania, depression, and overall bipolar illness) and change from preceding phase (CGI-BP change from preceding phase: mania, depression, and overall bipolar illness) based on a 7-point scale from 1 ('normal, not ill') to 7 ('very severely ill').

• Schizophrenia
• Bipolar I Disorder

• Drug: Aripiprazole
  Aripiprazole long acting injection.
• Drug: Aripiprazole
  Aripiprazole depot injection

• Experimental: Aripiprazole 2M LAI

  2 Months (2M) Long-acting injection (LAI).

  Participants will receive a total of 4 injections of aripiprazole 2M LAI, administered every 56 days (+/- 2 days) from Day 1.

  Participants will continue to take their current oral antipsychotic or be given 10 to 20 mg oral aripiprazole for 7 days after the first administration.

  Intervention: Drug: Aripiprazole
• Active Comparator: Aripiprazole 1M depot injection

  1 Month (1M) depot injection.

  Participants will receive a total of 8 injections of aripiprazole 1M depot, administered every 28 days (+/- 2 days) from Day 1.

  Participants will continue to take their current oral antipsychotic or be given 10 to 20 mg oral aripiprazole for 14 days after the first administration.

  Intervention: Drug: Aripiprazole

Inclusion Criteria:

• A current diagnosis of schizophrenia or bipolar I disorder, as defined by DSM-5 criteria.
• Body mass index of 18 to 35 kg/m2.
• On a stable dose of an atypical oral antipsychotic medication for at least 2 months prior to screening.

Exclusion Criteria:

• Participants who have:

  • Met DSM-5 criteria for substance use disorder within the past 180 days.
  • A positive drug screen for drugs of abuse
• Use of any psychotropic medications other than their current non-aripiprazole antipsychotic or mood stabilizer(s) medication; or subjects who use more than one antipsychotic or mood stabilizer(s) medication at screening.
• Females who are pregnant, breast-feeding, lactating, and/or have a positive pregnancy test result prior to receiving IMP. A negative serum pregnancy test must be confirmed prior to the first dose of IMP for all female participants.
• Any major surgery within 30 days prior to enrollment or scheduled/elective surgery during the trial.
• Evidence of organ dysfunction or any clinically significant deviation from normal in the physical, electrocardiographic, or clinical laboratory examinations.
• Participants currently in an acute relapse of schizophrenia.
• Participants with a current DSM-5 diagnosis other than schizophrenia or bipolar I disorder, including schizoaffective disorder, major depressive disorder, delirium, dementia, amnestic, or other cognitive disorders. Also, subjects with borderline, paranoid, histrionic, or antisocial personality disorder.
• Participants with a history of neuroleptic malignant syndrome or clinically significant tardive dyskinesia.
• History of any significant drug allergy or known or suspected hypersensitivity, in particular to aripiprazole or other quinolinones.
• History of or current hepatitis or acquired immunodeficiency syndrome or carriers of HBsAg or anti-HCV, and/or HIV antibodies.
• Participants deemed intolerant of receiving injections.
• Participants who have had electroconvulsive therapy within 2 months of administration of IMP.