Schizophrenia. F20.5
Conditions
Interventions
Intervention 1: Subjects in the intervention group receive memantine with an initial dose of 10 mg/day for first week, which is increased to 20 mg/day on the second week and continue with the same
Treatment - Drugs
Placebo
Subjects in the intervention group receive memantine with an initial dose of 10 mg/day for first week, which is increased to 20 mg/day on the second week and continue with the same dose until the
The control group receive their antipsychotic regimen with placebo for eight weeks.
Sponsors
Vice chancellor for research, Mazandaran University of Medical Sciences
Eligibility
Sex/Gender
All
Age
18 Years to 65 Years
Inclusion criteria
Inclusion criteria: Inclusion criteria: 1- Male or female are recruited from in-patient units in yahyaneghad hospital located in Babol in the north of Iran 2- 18–65 years at the time of screening 3- With a diagnosis of schizophrenia(paranoid, disorganized, catatonic, or undifferentiated type)or schizoaffective disorder, based on the Structured Clinical Interview for DSM-V and they are suffering from the disease for more than 2 years with residual symptomatology despite antipsychotic treatment 4- All patients are on antipsychotics for at least 1 year and a stable dose for at least 2 month are included in the trial and the antipsychotics dose remain unchanged during the trial. 5- Mood stabilizers (lithium and divalproex) and antidepressants (only the selective serotonine reuptake inhibitors (SSRIs) venlafaxine, and mirtazapine) were permitted as part of antipsychotic pharmacotherapy. Dose of these drugs must be stable for at least 2 month remain unchanged during the trial. Exclusions criteria: 1- Acute relapse (As acute relapse was defined an impending decompensation based on a PANSS score of =4 (moderately) on the subscore items of hostility and uncooperativeness and/or a =20% increase in the PANSS total score. 2- Psychiatric comorbidity(primary or secondary diagnosis of bipolar I disorder, either manic or mixed episode, as defined by DSM-V) 3- History of substance dependence (including alcohol, but excluding nicotine) as defined by DSM-V and relapse within the past 6 months, or substance abuse within the 3 months preceding the trial or positive urine test for illicit drugs 4- Electroconvulsive therapy during the 6 past months 5- Suicidality(active suicide or homicide intent, or a suicide or homicide attempt in the preceding 6 months) 6- Mental retardation 7- Pregnant or at risk of pregnancy 8- Cognitive disorders such as dementia, delirium, or amnesia, traumatic brain injury 9- Current significant unstable medical illness (such as unstable cardiac disease, hepatic or renal impairment, evidence or history of malignancy or any significant hematological, endocrine)/ HIV infection / abnormalities on physical examination, vital signs, electrocardiogram (ECG), or clinical laboratory values 10- Hypersensitivity to memantine 11- Previous treatment with memantine in the past year 12- History of neuroleptic malignant syndrome 13- Patients under treatment cholinesterase inhibitors, N-methyl D-aspartate (NMDA) receptor antagonists 14- Unwilling or unable, in the opinion of the Investigator, to comply with study instructions
Exclusion criteria
Exclusion criteria:
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Severity of psychiatric symptoms assesment. Timepoint: Baseline and weeks 3, 6 and 8. Method of measurement: Positive and Negative Syndrome Scale (PANSS). | — |
Secondary
| Measure | Time frame |
|---|---|
| Depressed mood assessment. Timepoint: Baseline and weeks 3, 6 and 8. Method of measurement: Calgary Depression Scale for Schizophrenia.;Severity and type of obsessive compulsive symptoms assessment. Timepoint: Baseline and weeks 3, 6 and 8. Method of measurement: Yale–Brown Obsessive Compulsive Scale.;Clinical Global Impression of Improvement (CGI-S). Timepoint: Baseline and weeks 3, 6 and 8. Method of measurement: Clinical Global Impression of Improvement (CGI-S).;Clinical Global Impression of Improvement (CGI-I). Timepoint: Baseline and weeks 3, 6 and 8. Method of measurement: Clinical Global Impression of Improvement (CGI-I).;Nigella sativa induced akathisia assessment. Timepoint: Weekly. Method of measurement: Barnes Akathisia Scale.;Nigella sativa induced Movement disorder assessment. Timepoint: Weekly. Method of measurement: Abnormal Involuntary Movement Scale. | — |
Countries
Iran (Islamic Republic of)
Contacts
Public ContactDr Narjes Hendouei
Mazandaran University of Medical Sciences
Outcome results
None listed