Invega Dosage

Generic name: paliperidone
Dosage form: tablet, extended release

This dosage information does not include all the information needed to use Invega safely and effectively. See full prescribing information for Invega.

The information at Drugs.com is not a substitute for medical advice. ALWAYS consult your doctor or pharmacist.

Recommended Dosing

For patients who have never taken oral paliperidone or oral or injectable risperidone, it is recommended to establish tolerability with oral paliperidone or oral risperidone prior to initiating treatment with INVEGA® SUSTENNA®.

Recommended initiation of INVEGA® SUSTENNA® is with a dose of 234 mg on treatment day 1 and 156 mg one week later, both administered in the deltoid muscle. The recommended monthly maintenance dose is 117 mg; some patients may benefit from lower or higher maintenance doses within the recommended range of 39 to 234 mg based on individual patient tolerability and/or efficacy. Following the second dose, monthly maintenance doses can be administered in either the deltoid or gluteal muscle.

Adjustment of the maintenance dose may be made monthly. When making dose adjustments, the prolonged-release characteristics of INVEGA® SUSTENNA® should be considered [see Clinical Pharmacology (12.3)], as the full effect of the dose adjustment may not be evident for several months.

Missed Doses

Avoiding Missed Doses

It is recommended that the second initiation dose of INVEGA® SUSTENNA® be given one week after the first dose. To avoid a missed dose, patients may be given the second dose 2 days before or after the one-week timepoint. Similarly, the third and subsequent injections after the initiation regimen are recommended to be given monthly. To avoid a missed monthly dose, patients may be given the injection up to 7 days before or after the monthly timepoint.

Missed Dose (1 Month to 6 Weeks)

After initiation, the recommended injection cycle of INVEGA® SUSTENNA® is monthly. If less than 6 weeks have elapsed since the last injection, then the previously stabilized dose should be administered as soon as possible, followed by injections at monthly intervals.

Missed Dose (> 6 Weeks to 6 Months)

If more than 6 weeks have elapsed since the last injection of INVEGA® SUSTENNA®, resume the same dose the patient was previously stabilized on (unless the patient was stabilized on a dose of 234 mg, then the first two injections should each be 156 mg) in the following manner: 1) a deltoid injection as soon as practically possible, followed by 2) another deltoid injection (same dose) one week later, and 3) resumption of either deltoid or gluteal dosing at monthly intervals.

Missed Dose (> 6 Months)

If more than 6 months have elapsed since the last injection of INVEGA® SUSTENNA®, initiate dosing as described in Section 2.1 above.

Administration Instructions

INVEGA® SUSTENNA® is intended for intramuscular use only. Inject slowly, deep into the muscle. Care should be taken to avoid inadvertent injection into a blood vessel. Each injection should be administered by a health care professional. Administration should be in a single injection. Do not administer the dose in divided injections. Do not administer intravascularly or subcutaneously.

The recommended needle size for administration of INVEGA® SUSTENNA® into the deltoid muscle is determined by the patient's weight. For those ≥ 90 kg (≥ 200 lb), the 1½-inch, 22 gauge needle is recommended. For those < 90 kg (< 200 lb), the 1-inch, 23 gauge needle is recommended. Deltoid injections should be alternated between the two deltoid muscles.

The recommended needle size for administration of INVEGA® SUSTENNA® into the gluteal muscle is the 1½-inch, 22 gauge needle. Administration should be made into the upper-outer quadrant of the gluteal area. Gluteal injections should be alternated between the two gluteal muscles.

Use with Oral Paliperidone or with Risperidone

Concomitant use of INVEGA® SUSTENNA® with oral paliperidone or oral or injectable risperidone has not been studied. Since paliperidone is the major active metabolite of risperidone, consideration should be given to the additive paliperidone exposure if any of these medications are coadministered with INVEGA® SUSTENNA®.

Dosage in Special Populations

Renal Impairment

INVEGA® SUSTENNA® has not been systematically studied in patients with renal impairment [see Clinical Pharmacology (12.3)]. For patients with mild renal impairment (creatinine clearance ≥ 50 mL/min to < 80 mL/min), recommended initiation of INVEGA® SUSTENNA® is with a dose of 156 mg on treatment day 1 and 117 mg one week later, both administered in the deltoid muscle. Thereafter, follow with monthly injections of 78 mg in either the deltoid or gluteal muscle.

INVEGA® SUSTENNA® is not recommended in patients with moderate or severe renal impairment (creatinine clearance < 50 mL/min).

Hepatic Impairment

INVEGA® SUSTENNA® has not been studied in patients with hepatic impairment. Based on a study with oral paliperidone, no dose adjustment is required in patients with mild or moderate hepatic impairment. Paliperidone has not been studied in patients with severe hepatic impairment. [See Clinical Pharmacology (12.3)]

Elderly

In general, recommended dosing of INVEGA® SUSTENNA® for elderly patients with normal renal function is the same as for younger adult patients with normal renal function. As elderly patients may have reduced renal function, see Renal Impairment above for dosing recommendations in patients with renal impairment.

Maintenance Therapy

INVEGA® SUSTENNA® has been shown to be effective in delaying time to relapse of symptoms of schizophrenia in long-term use. It is recommended that responding patients be continued on treatment at the lowest dose needed. Patients should be periodically reassessed to determine the need for continued treatment.

Switching from Other Antipsychotics

There are no systematically collected data to specifically address switching patients with schizophrenia from other antipsychotics to INVEGA® SUSTENNA®, or concerning concomitant administration with other antipsychotics.

Switching from Oral Antipsychotics

For patients who have never taken oral paliperidone or oral or injectable risperidone, tolerability should be established with oral paliperidone or oral risperidone prior to initiating treatment with INVEGA® SUSTENNA®.

Previous oral antipsychotics can be discontinued at the time of initiation of treatment with INVEGA® SUSTENNA®. INVEGA® SUSTENNA® should be initiated as described in Section 2.1. Patients previously stabilized on different doses of INVEGA® Extended-Release tablets can attain similar paliperidone steady-state exposure during maintenance treatment with INVEGA® SUSTENNA® monthly doses as depicted in Table 1.

Table 1. Doses of INVEGA® and INVEGA® SUSTENNA® needed to attain similar paliperidone exposure at steady-state
Formulation INVEGA®
Extended-Release Tablet
INVEGA® SUSTENNA®
Injection
Dosing Frequency Once Daily Once every 4 weeks
Dose (mg) 12
6
3
234
117
39–78

Switching from Long-Acting Injectable Antipsychotics

For patients who have never taken oral paliperidone or oral or injectable risperidone, tolerability should be established with oral paliperidone or oral risperidone prior to initiating treatment with INVEGA® SUSTENNA®.

When switching patients from previous long-acting injectable antipsychotics, initiate INVEGA® SUSTENNA® therapy in place of the next scheduled injection. INVEGA® SUSTENNA® should then be continued at monthly intervals. The one-week initiation dosing regimen as described in Section 2.1 is not required.

If INVEGA® SUSTENNA® is discontinued, its prolonged-release characteristics must be considered. As recommended with other antipsychotic medications, the need for continuing existing extrapyramidal symptoms (EPS) medication should be re-evaluated periodically.

Instructions for Use

The kit contains a prefilled syringe and 2 safety needles (a 1 ½-inch 22 gauge needle and a 1-inch 23 gauge needle) for intramuscular injection.

Figure

INVEGA® SUSTENNA® is for single use only.

1.
Shake the syringe vigorously for a minimum of 10 seconds to ensure a homogeneous suspension.
Figure
2.
Select the appropriate needle.
 
For DELTOID injection, if the patient weighs < 200 lb (< 90 kg), use the 1-inch 23 gauge needle (needle with blue colored hub); if the patient weighs ≥ 200 lb (≥ 90 kg), use the 1 ½-inch 22 gauge needle (needle with gray colored hub).
 
For GLUTEAL injection, use the 1 ½-inch 22 gauge needle (needle with gray colored hub).
3.
While holding the syringe upright, remove the rubber tip cap with an easy clockwise twisting motion.
Figure
4.
Peel the safety needle pouch half way open. Grasp the needle sheath using the plastic peel pouch. Attach the safety needle to the luer connection of the syringe with an easy clockwise twisting motion.
Figure
5.
Pull the needle sheath away from the needle with a straight pull. Do not twist the sheath as the needle may be loosened from the syringe.
Figure
6.
Bring the syringe with the attached needle in upright position to de-aerate. De-aerate the syringe by moving the plunger rod carefully forward.
Figure
7.
Inject the entire contents intramuscularly into the selected deltoid or gluteal muscle of the patient. Do not administer intravascularly or subcutaneously.
8.
After the injection is complete, use either thumb or finger of one hand (8a, 8b) or a flat surface (8c) to activate the needle protection system. The needle protection system is fully activated when a 'click' is heard. Discard the syringe with needle appropriately.
8a
Figure  
8b  
Figure  
8c  
Figure  

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