Combining Mirtazapine and Risperidone for Psychiatric Treatment

Clinical Applications and Safety Considerations

The combination of mirtazapine and risperidone can be used to address insomnia with psychiatric illness, with mirtazapine's sedating properties at bedtime helping to address sleep disturbances while risperidone manages psychotic symptoms 1
Mirtazapine can substitute for addressing depression/insomnia rather than agitation in patients requiring oral therapy, with oral risperidone 2 mg plus lorazepam 2 mg having demonstrated efficacy for cooperative agitated patients 2
Sedation is a common side effect to monitor, particularly with mirtazapine, and may benefit patients with insomnia 1
Orthostatic hypotension is a potential side effect, with both medications contributing to the risk 1
The American Academy of Sleep Medicine notes that extrapyramidal symptoms should be monitored for risperidone-related EPS, though mirtazapine does not increase this risk 3

Screening for sleep-disordered breathing is necessary if using the combination for insomnia, as both medications are sedating 1