INVEGA SUSTENNA DOSAGE INFORMATION
Invega Sustenna, a long-acting injectable antipsychotic, is available in several dosage strengths. The typical starting dose for schizophrenia is 234 mg once monthly [1]. For schizoaffective disorder, the recommended starting dose is also 234 mg once monthly [1].
How Doctors Adjust INVEGA SUSTENNA Doses
Following the initial dose, the dose can be adjusted based on individual patient response and tolerability. Maintenance doses for schizophrenia can range from 39 mg to 234 mg, administered monthly [1]. For schizoaffective disorder, maintenance doses can also range from 39 mg to 234 mg, given once monthly [1]. There is also a 78 mg dosage option [1].
When Can INVEGA SUSTENNA Doses Be Changed?
Dose adjustments can typically be made at the time of the next monthly injection [1]. For patients transitioning from other antipsychotic medications, the initial dose and any necessary adjustments are determined by the prescribing physician, considering the specific medication being switched from and the patient's condition [1].
Are There Specific Dosing Schedules for New Patients?
New patients or those switching from oral antipsychotics usually begin with a 234 mg dose on their first day of treatment, followed by a second dose of 156 mg one week later [1]. A month after the second dose, the patient would receive their first monthly maintenance dose, which can be 39 mg, 78 mg, 117 mg, 156 mg, or 234 mg, depending on clinical assessment [1].
What Happens if a Dose of INVEGA SUSTENNA is Missed?
If a scheduled monthly dose is missed, it should be administered as soon as possible, and then monthly injections can resume on the newly established schedule [1]. If more than two months have passed since the last injection, re-titration may be necessary, starting with a 234 mg dose, followed by a 156 mg dose one week later, and then proceeding with monthly doses as tolerated [1].
What Other Doses of INVEGA SUSTENNA Exist?
Invega Sustenna is available in the following intramuscular injection strengths: 39 mg, 78 mg, 117 mg, 156 mg, and 234 mg [1].
Sources:
1. https://www.drugpatentwatch.com/p/drug/invega-sustenna