HAMD-17 is a 17-item scale that evaluates depressed mood, vegetative and cognitive symptoms of depression, and co-morbid anxiety symptoms. The 17 items were rated on either a 5-point (0-4) or a 3-point (0-2) scale. In general, the 5 point scale items use a rating of 0=absent; 1=doubtful to mild; 2=mild to moderate; 3=moderate to severe; 4=very severe. The 3-point scale items use a rating of 0=absent; 1=probable or mild; 2=definite. The total HAMD-17score ranges from 0 (not ill) to 52 (severely ill). The highest possible score was 52, which represented the most severe measure of depression; the lowest possible score was 0, which represents an absence of depression. Baseline was defined as the assessment done on Day 1 (pre-dose). Change from baseline in total Score was the difference between HAMD total score at the time point being analyzed to Day 1.

The bech melancholia is sum of scores on 6 items- depressed mood, feelings of guilt, work and activities, retardation, anxiety psychic, somatic symptoms general (items 1, 2, 7, 8, 10 and 13 respectively). Each item having 5 responses. The items are rated on a scale of 0-4, where 0=absent; 1=doubtful to mild; 2=mild to moderate; 3=moderate to severe; 4=very severe. Total possible score is 0-24. where the lowest possible score was 0, which represented an absence of depression and higher scores reflecting greater severity of diseases. Baseline was defined as the assessment done on Day 1. Change from baseline was the difference between BECH 6 scale at the time point being analyzed to randomization.

The QIDS-SR is a 16-item, participant-rated short form of the Inventory of Depressive Symptomatology that assesses 9 domains: sad mood, concentration, self-criticism, suicidal ideation, interest, energy/fatigue, sleep disturbance (initial, middle, and late insomnia or hypersomnia), appetite/weight increase/decrease and psychomotor agitation/retardation. A total score was obtained by summing scores on each domain. the scores ranges from 0 (none) to 27 (very severe), where the highest possible score was 27, which represented the most severe measure of depression; the lowest possible score was 0, which represents an absence of depression. Baseline was defined as the assessment done on Day 1. Change from Randomization in total score was the difference between QIDS total score at the time point being analyzed to randomization.

The C-SSRS was a clinician-rated scale that evaluated severity and change of suicidality by integrating both behaviour and ideation. The 2 of 3 sections of the scale were suicidal behavior and suicidal ideation. For suicidal behaviour participants were scored as non-suicidal-0, preparatory acts or behavior communicating ideation-01, aborted attempt-2, interrupted attempt-3 or actual attempt-4. The score ranges from 0-4, where 0 was absence of suicidal behavior and 4 being the most severe form of suicidal behavior. On the Suicidal Ideation scale, participants were scored as non-suicidal-0, wish to be dead-1, non-specific active suicidal thoughts-2, active suicidal ideation with associated thoughts of methods without intent-3, active suicidal ideation with some intent to act on suicidal thoughts without clear plan-4, active suicidal ideation with plan and intent-5. The score ranges from 0-5, where 0 was absence of suicidal ideation and 5 being the most severe form of suicidal ideation.

Only those parameters for which at least one value of CC was reported were summarized. Pre-defined limits of CC (CC Low \[relative to the lower limit of normal\], CC High \[relative to the upper limit of normal\]) were: hemoglobin (Hb): \> 25, 180; hematocrit (Hct): \> 0.075, 0.54; absolute neutrophil count (ANC): \< 1.5, NA; platelet: \< 100, \> 550; white blood cells (WBC): \< 3,\> 20

Only those parameters for which at least one value of CC was reported were summarized. Pre-defined limits of CC (CC Low \[relative to the lower limit of normal\], CC High \[relative to the upper limit of normal\]) were: albumin (unit: gram per liter): \< 30, NA; alanine aminotransferase (ALT): NA, \>= 3 times upper limit of normal; aspartate aminotransferase (AST): NA, \>= 3 times upper limit of normal; total bilirubin: NA, \>=1.5 times upper limit of normal; calcium: \< 2.0, \> 2.75; gamma glutamyl transferase (GGT): \< 3.0, \> 9; potassium: \< 3.0, \> 5.5; magnesium: \< 0.5, \> 1.23.

Clinical liver chemistry parameters of Alkaline Phosphatase , ALT, AST, GGT were assessed on screening, Day 7, Day 14, Day 28 and Day 42. Screening was defined as Baseline. Change from Baseline in liver chemistry was the difference between the value at time point analyzed and screening.

Liver chemistry parameters: Direct Bilirubin and Total Bilirubin were assessed on screening, Day 7, Day 14, Day 28 and Day 42. Screening was defined as Baseline. Change from Baseline in liver chemistry was the difference between the value at time point analyzed and screening.

Urinalysis parameters included: Urine Occult Blood, Urine Ketones, Urine Ketones. data for number of participants with abnormal urinanalysis parameters was reported by dipstick method. dipstick was a strip used to detect the presence or absence of these parameters in the urine sample. dipstick test gives results in a semi-quantitative manner, and results can be read as negative, Trace, 1+, 2+, and 3+, indicating proportional concentrations in the urine sample. Urine occult blood dipstick and urine general dipstick were semi quantitative results. Urine glucose and urine ketones dipstick results were in milimole per liter, urine protein dipstick results were in gram per liter.

Data for change from Baseline was reported for PR Interval, QRS Duration, QT Interval, QTcB, QTcF, and RR Interval. 12-lead ECGs was obtained at each time point during the study using an ECG machine that automatically calculated the heart rate and measures PR, QRS, QT, and QTcB ,QTcF, and RR intervals. Day -1 evening (PM) was the Baseline for participants with only Day -1 records. Day 1 PM Dose was the Baseline for participants with Day 1 records. Baseline was the mean of replicate assessments. Change from Baseline was the difference between the value at the time point analyzed and baseline value.

Semi-supine systolic and diastolic blood pressure was assessed at the specified time points. Measurements were taken after the participant has been semi-supine for at least 5 minutes. BP was measured at least every hour until the values were within the normal range. Day 1 was Baseline and change from Baseline was difference between the value at the time point analyzed and baseline value.

Heart rate is the speed of the heartbeat measured by the number of contractions of the heart per minute, (beats per minute). Heart rate was assessed at the specified time points. Measurements were taken after the participant has been semi-supine for at least 5 minutes. Day 1 was Baseline and change from Baseline was difference between the value at the time point analyzed and baseline value.

Data for number of participants who presented one or more adverse events (serious or non serious) was reported. An AE was defined as any untoward medical occurrence (MO) in a participant temporally associated with the use of a medicinal product (MP), whether or not considered related to the MP and can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with its use. The SAE was any untoward MO that, at any dose, results in death, life threatening, persistent or significant disability/incapacity, results in or prolongs inpatient hospitalization, congenital abnormality or birth defect, that may not be immediately life-threatening or result in death or hospitalization but may jeopardize the participant or may require medical or surgical intervention to prevent one of the other outcomes listed in this definition.