Clozapine Titration Protocol

Assessment and Titration

• For a patient currently on 550 mg of clozapine daily, maintain this dose if therapeutic response is adequate and plasma levels are within 350-550 ng/mL, as this represents an optimal therapeutic range with balanced efficacy and safety 1, 2
• Evaluate current therapeutic response and tolerability at the 550 mg dose 1
• Check clozapine plasma concentration, with a target range of 350-550 ng/mL 1
• Consider increasing dose to achieve plasma concentration up to 550 ng/mL if response is inadequate 1, 2
• If considering exceeding 550 ng/mL plasma concentration, discuss risks and benefits with patient and caregivers, and consider prophylactic lamotrigine to reduce seizure risk 1
• The number needed to treat for response at levels above 550 ng/mL is 17 1
• Aim for the lowest effective dose that maintains therapeutic response 1

Augmentation Strategies

• Consider augmentation with amisulpride or aripiprazole if positive symptoms persist 1, 2
• Consider antidepressant augmentation if negative symptoms predominate 1
• Electroconvulsive therapy may be beneficial for persistent positive symptoms 1