Approval Probability
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MK-8435 4 · 1 trial · 1 indication
SANS was a 25-item clinician-rated instrument for assessing the negative symptoms of schizophrenia. SANS 1-22 Composite Score consisted of the SANS 25 scale minus the last 3 questions (attention items). The remaining non-attention items (affective flattening, alogia, avolition-apathy, and anhedonia-asociality) comprised the SANS 1-22 Composite Score. For each item, symptom severity was rated on a 6-point scale, from 0=absent to 5=severe. The SANS 1-22 Composite Score had a total scoring range of 0 to 110. Higher scores indicated more impairment. The SANS 1-22 Composite Score was reported using data from the adjusted site rater. A negative change from baseline indicated an improvement in symptoms.
| Arm | Type | Description |
|---|---|---|
| MK-8435 (Org 25935) 8-16 mg per day | EXPERIMENTAL | Participants will be maintained on a stable dose of Second Generation Antipsychotic (SGA) and receive 4-8 mg MK-8435 (Org 25935) BID, in the morning and the evening, as add-on treatment for up to 87 days. The dose of MK-8435 (Org 25935) can be titrated upward or downward within the specified dose range, as needed, up to Day 42 of the study. The dose must remain stable after Day 42 for the remainder of the study. |
| MK-8435 (Org 25935) 24-32 mg per day | EXPERIMENTAL | Participants will be maintained on a stable dose of SGA and receive 12-16 mg MK-8435 (Org 25935) BID, in the morning and the evening, as add-on treatment for up to 87 days. The dose of MK-8435 (Org 25935) can be titrated upward or downward within the specified dose range, as needed, up to Day 42 of the study. The dose must remain stable after Day 42 for the remainder of the study. |
| Placebo | PLACEBO_COMPARATOR | Participants will be maintained on a stable dose of SGA and receive matching placebo for MK-8435 (Org 25935) BID, in the morning and the evening, as add-on treatment for up to 87 days. |
| Name | Type | Description |
|---|---|---|
| MK-8435 (Org 25935) 4-8 mg | DRUG | Administered orally 2 times a day (BID) for a final concentration of 8-16 mg/day |
| Placebo | DRUG | Matching placebo for MK-8435 (Org 25935) administered orally BID |
| MK-8435 (Org 25935) 12-16 mg | DRUG | Administered orally BID for a final concentration of 24-32 mg/day |
Inclusion Criteria: * Is diagnosed with non-first episode schizophrenia meeting Diagnostic and Statistical Manual (Version IV) criteria * Is receiving stable treatment with one of the following SGA: aripiprazole, olanzapine, quetiapine, risperidone, or ziprasidone * Is in the non-acute phase of ill...
MK-8435 4 is an investigational small molecule being studied for the treatment of schizophrenia, specifically for negative symptoms of the condition. It is a glycine uptake inhibitor, which means it works by modulating glycine levels in the brain, a mechanism relevant to schizophrenia. The drug is currently in Phase 2 clinical development.
MK-8435 4 targets the glycine uptake system, functioning as a glycine uptake inhibitor. By inhibiting glycine reuptake, it increases glycine availability in the synaptic cleft, which may enhance NMDA receptor function. This mechanism is being investigated for its potential to improve negative symptoms in schizophrenia.
MK-8435 4 is being developed by Merck & Company, Inc., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol MRK. The company is conducting clinical trials to evaluate the drug's safety and efficacy for schizophrenia.
MK-8435 4 is in Phase 2 clinical development. It is an investigational drug, meaning it has not been approved by regulatory authorities and is still undergoing clinical trials to assess its safety and effectiveness for treating schizophrenia.
MK-8435 4 has one completed Phase 2 clinical trial registered under NCT00725075. The trial, titled 'Adjuvant Treatment With a Glycine Uptake Inhibitor in Participants With Negative Symptoms of Schizophrenia (P05695) (MK-8435-001)', enrolled 215 participants and was a randomized, double-blind, placebo-controlled study.