Latuda and Alcohol/Food Interactions

GENERALLY AVOID: Grapefruit juice may significantly increase the plasma concentrations of lurasidone. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruit. Inhibition of hepatic CYP450 3A4 may also contribute. The interaction has not been studied with grapefruit juice, but has been reported for other CYP450 3A4 inhibitors. When a single 10 mg dose of lurasidone was administered with the potent CYP450 3A4 inhibitor ketoconazole (400 mg/day for 5 days), lurasidone peak plasma concentration (Cmax) and systemic exposure (AUC) increased by 6.9- and 9.0-fold, respectively, compared to administration alone. The AUC of lurasidone's active metabolite increased by 6-fold. Another potent CYP450 3A4 inhibitor, posaconazole, has been reported to increase lurasidone AUC by approximately 4.5-fold. When a single 20 mg dose of lurasidone was administered with the moderate CYP450 3A4 inhibitor diltiazem (extended release formulation 240 mg/day for 5 days), lurasidone Cmax and AUC increased by 2.1- and 2.2-fold, respectively, while the AUC of the active metabolite increased by 2.4-fold. In general, the effect of grapefruit juice is concentration-, dose- and preparation-dependent, and can vary widely among brands. Certain preparations of grapefruit juice (e.g., high dose, double strength) have sometimes demonstrated potent inhibition of CYP450 3A4, while other preparations (e.g., low dose, single strength) have typically demonstrated moderate inhibition.

GENERALLY AVOID: Alcohol may potentiate some of the central nervous system and hypotensive effects of lurasidone. Use in combination may result in increased sedation, dizziness, hypotension, and impairment of judgment, thinking, and psychomotor skills.

ADJUST DOSING INTERVAL: Food increases the oral bioavailability of lurasidone. According to the product labeling, lurasidone mean Cmax and AUC were increased approximately 3-fold and 2-fold, respectively, when administered with food relative to under fasting conditions. Lurasidone AUC was not affected by meal size (in the range of 350 to 1000 calories) or fat content. In clinical studies, lurasidone was administered with food.

MANAGEMENT: Patients treated with lurasidone should avoid consumption of grapefruit and grapefruit juice as well as alcohol. Lurasidone should be taken with food (at least 350 calories).

atypical antipsychotic agents - hyperglycemia/diabetes

Hyperglycemia, in some cases extreme and associated with ketoacidosis or hyperosmolar coma or death, has been reported with the use of atypical antipsychotic agents. Patients with diabetes should be monitored for worsening control of blood glucose when treated with these agents. It is recommended that patients with risk factors for diabetes mellitus starting treatment with atypical antipsychotics should undergo fasting blood glucose testing at the beginning of treatment, and periodically thereafter. Any patient treated with atypical antipsychotics should be monitored for symptoms of hyperglycemia including polydipsia, polyuria, polyphagia, and weakness. Patients who develop symptoms of hyperglycemia during treatment with atypical antipsychotics should undergo fasting blood glucose testing. In some cases, hyperglycemia has resolved when treatment with these agents was discontinued; however, some patients required continuation of anti-diabetic treatment despite discontinuation of the atypical antipsychotic drug.

atypical antipsychotic agents - lipid alterations

Atypical antipsychotic drugs have been associated with undesirable alterations in lipid levels. While all agents in the class have been shown to produce some changes, each drug has its own specific risk profile. Before or soon after initiation of antipsychotic medications, a fasting lipid profile should be obtained at baseline and monitored periodically during treatment.

atypical antipsychotic agents - weight gain

Weight gain has been observed with atypical antipsychotic use. While all agents in the class have been shown to produce some changes, each drug has its own specific risk profile. When treating pediatric patients with atypical antipsychotic agents, weight gain should be monitored and assessed against that expected for normal growth. Monitor weight at baseline and frequently thereafter.