olanzapine + amisulpride

A combination of two atypical antipsychotics used primarily for treatment-resistant schizophrenia. This combination has shown improved efficacy compared to monotherapy in some patients, with the benefit of potentially lower doses of each medication. ## Pharmacological Information **Dosing**: When used in combination, both medications are typically administered at lower doses than when used as monotherapy[3][4]. In clinical studies, amisulpride dosing ranged from 100-800 mg per day, while olanzapine dosing ranged from 5-20 mg per day[2][8]. The combination therapy allows for dose reduction of both medications, which may help reduce side effects while maintaining therapeutic efficacy[3][4]. In one study, the mean doses used were 222 mg for amisulpride and 16 mg for olanzapine[8]. ## Efficacy and Clinical Use The combination of olanzapine and amisulpride has shown promise in treating schizophrenia patients who don't respond adequately to monotherapy[1][3]. A randomized controlled trial (COMBINE) compared the combination therapy against each drug as monotherapy in acutely ill schizophrenia patients[2][5]. The advantages of this combination include: - Improved psychopathological state compared to monotherapy[1][3] - Potential for faster response in acute clinical situations[5] - Lower doses of each medication compared to monotherapy[3][4] ## Side Effects and Safety Considerations The benefits of this combination must be weighed against potential side effects: - Higher incidence of sexual dysfunction[2] - Greater increases in weight and waist circumference compared to amisulpride monotherapy[2] - Potential for QT prolongation and risk of irregular heart rhythm that may be serious[7] One advantage of this combination is that amisulpride is primarily cleared renally, while olanzapine is metabolized hepatically, which may reduce some drug interaction concerns[5]. ## Clinical Applications This combination therapy may be particularly useful in: - Treatment-resistant schizophrenia cases[1][3][4] - Pre-clozapine clinical situations[4] - Cases where clozapine fails or is refused by patients[4] - Acute clinical situations requiring rapid response[5]