Savella

2.1        Recommended Dosing

The recommended dose of SAVELLA is 100 mg/day (50 mg twice daily).

Based on efficacy and tolerability dosing may be titrated according to the following schedule:

Day 1: 12.5 mg once

Days 2-3: 25 mg/day (12.5 mg twice daily)

Days 4-7: 50 mg/day (25 mg twice daily)

After Day 7: 100 mg/day (50 mg twice daily)

Based on individual patient response, the dose may be increased to 200 mg/day (100 mg twice daily).

Doses above 200 mg/day have not been studied.

Taper SAVELLA and do not abruptly discontinue after extended use [see Dosage and Administration ( 2.4), Warnings and Precautions ( 5.7)].

2.2        Patients with Renal Insufficiency

No dosage adjustment is necessary in patients with mild renal impairment.

Use SAVELLA with caution in patients with moderate renal impairment.

For patients with severe renal impairment (indicated by an estimated creatinine clearance of 5-29 mL/min), reduce the maintenance dose by 50% to 50 mg/day (25 mg twice daily).

Based on individual patient response, the dose may be increased to 100 mg/day (50 mg twice daily).

SAVELLA is not recommended for patients with end-stage renal disease.

2.3        Patients with Hepatic Insufficiency

No dosage adjustment is necessary for patients with hepatic impairment.

As with any drug, exercise caution in patients with severe hepatic impairment.

2.4        Discontinuing SAVELLA

Withdrawal symptoms have been observed in clinical trials following discontinuation of milnacipran, as with other serotonin and norepinephrine re-uptake inhibitors (SNRIs) and selective serotonin re-uptake inhibitors (SSRIs). Monitor patients for these symptoms when discontinuing treatment. Taper SAVELLA and do not abruptly discontinue after extended use [see Warnings and Precautions ( 5.7)].

2.5        Switching a Patient to or from a Monoamine Oxidase Inhibitor (MAOI) Intended to Treat Psychiatric Disorders

At least 14 days should elapse between discontinuation of a MAOI intended to treat psychiatric disorders and initiation of therapy with SAVELLA. Conversely, allow at least 5 days after stopping SAVELLA before starting a MAOI intended to treat psychiatric disorders [see Contraindications ( 4.1)].

2.6        Use of SAVELLA with other MAOIs such as Linezolid or Methylene Blue

Do not start SAVELLA in a patient being treated with linezolid or intravenous methylene blue because there is increased risk of serotonin syndrome. In a patient who requires more urgent treatment of a psychiatric condition, consider other interventions, including hospitalization [see Contraindications ( 4.1)].

In some cases, a patient already receiving SAVELLA therapy may require urgent treatment with linezolid or intravenous methylene blue. If acceptable alternatives to linezolid or intravenous methylene blue treatment are not available and the potential benefits of linezolid or intravenous methylene blue treatment are judged to outweigh the risks of serotonin syndrome in a particular patient, discontinue SAVELLA promptly, and consider administering linezolid or intravenous methylene blue. Monitor the patient for symptoms of serotonin syndrome for 5 days or until 24 hours after the last dose of linezolid or intravenous methylene blue, whichever comes first. Therapy with SAVELLA may be resumed 24 hours after the last dose of linezolid or intravenous methylene blue [see Warnings and Precautions ( 5.2)].

The risk of administering methylene blue by non-intravenous routes (such as oral tablets or by local injection) or in intravenous doses much lower than 1 mg/kg with SAVELLA is unclear. The clinician should nevertheless be aware of the possibility of emergent symptoms of serotonin syndrome with such use [see Warnings and Precautions ( 5.2)].

8.1        Pregnancy

Pregnancy Exposure Registry

There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to SAVELLA during pregnancy. 

Physicians are advised to recommend that pregnant patients taking SAVELLA enroll in the Savella Pregnancy Registry. Enrollment is voluntary and may be initiated by pregnant patients or their healthcare providers by contacting the registry at 1-877-643-3010 or by email at pregnancyregistries@incresearch.com. Data forms may also be downloaded from the registry website at www.savellapregnancyregistry.com.

Risk Summary

Based on data from published observational studies, exposure to SNRIs, particularly in the month before delivery, has been associated with a less than 2-fold increase in the risk of postpartum hemorrhage [see Warnings and Precautions ( 5.2)].

The available data on SAVELLA use in pregnant women are insufficient to evaluate for a drug-associated risk of major birth defects, miscarriage, or adverse maternal or fetal outcomes. There are risks associated with exposure to serotonin and norepinephrine reuptake inhibitors (SNRIs) and selective-serotonin reuptake inhibitors (SSRIs), including SAVELLA, during pregnancy (see Clinical Considerations). Animal reproduction studies have been performed in rats, rabbits and mice. Milnacipran was shown to increase embryofetal and perinatal lethality in rats and the incidence of a minor skeletal variation in rabbits at doses below (rat) or approximately equal to (rabbit) the maximum recommended human dose (MRHD) of 200 mg/day on a mg/m2 basis. No effects were seen in mice when treated with milnacipran during the period of organogenesis at doses up to 3 times the MHRD on a mg/m2 basis (see Data).

The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2%-4% and 15%-20%, respectively.

Clinical Consideration

Maternal adverse reactions

Use of SAVELLA in the month before delivery may be associated with an increased risk of postpartum hemorrhage [see Warnings and Precautions ( 5.9)].

Fetal/Neonatal adverse reactions

Neonates exposed to SNRIs or SSRIs, including SAVELLA, late in the third trimester have developed complications requiring prolonged hospitalization, respiratory support, and tube feeding. Such complications can arise immediately upon delivery.

Reported clinical findings have included respiratory distress, cyanosis, apnea, seizures, temperature instability, feeding difficulty, vomiting, hypoglycemia, hypotonia, hypertonia, hyperreflexia, tremor, jitteriness, irritability, and constant crying. These findings are consistent with either direct toxic effect of SSRIs and SNRIs or possibly, a drug discontinuation syndrome. It should be noted that, in some cases, the clinical picture is consistent with serotonin syndrome [see Warnings and Precautions ( 5.2, 5.7)].

Data

Animal Data

Studies were conducted in rats, rabbits and mice with dosing of milnacipran during the period of organogenesis. In rats, milnacipran was shown to increase embryofetal lethality at doses of 5 mg/kg/day (0.25 times the MRHD on a mg/m2 basis). In rabbits, dose-dependent increases in the incidence of the skeletal variation of an extra single rib were observed in several pups from multiple litters in the absence of maternal toxicity at 15 mg/kg/day (1.5 times the MRHD on a mg/m2 basis). The clinical significance of this finding is unknown. In mice, no embryotoxic or teratogenic effects were seen at doses up to 125 mg/kg/day (3 times the MHRD on a mg/m2 basis).

With peri- and postnatal exposure to oral milnacipran in rats, decreases in viability and body weight were observed on Postpartum Day 4 at a dose of 5 mg/kg/day (approximately 0.25 times the MRHD on a mg/m2 basis). The no-effect dose for maternal and offspring toxicity was 2.5 mg/kg/day (approximately 0.1 times the MRHD on a mg/m2 basis).

8.2        Lactation

Risk Summary

Milnacipran is present in human milk [see Data]. There are no reports on the effects of milnacipran on the breastfed child and on milk production/excretion. However, there are reports of agitation, irritability, poor feeding, and poor weight gain in infants exposed to SSRIs or SNRIs through breast milk (see Clinical Considerations).

The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for SAVELLA and any potential adverse effects on the breastfed child from SAVELLA or from the underlying maternal conditions.

Clinical Considerations

Monitor infants exposed to milnacipran for agitation, irritability, poor feeding and poor weight gain.

Data

Human Data

Milnacipran is present in the milk of lactating women treated with milnacipran. In a lactation pharmacokinetic study with milnacipran, a single, oral dose of 50 mg milnacipran HCl tablet was administered to 8 lactating women who were at least 12 weeks postpartum and weaning their infants. The milk/plasma AUC ratio of milnacipran was 1.85 ± 0.38. The maximum estimated weight adjusted daily infant dose for milnacipran from breast milk (assuming mean milk consumption of 150 mL/kg/day) was 5% of the maternal dose based on peak plasma concentrations.  

8.4        Pediatric Use

Safety and effectiveness of SAVELLA in a fibromyalgia pediatric population below the age of 18 have not been established [see Boxed Warning, Indications and Usage ( 1), and Warnings and Precautions ( 5.1)]. The use of SAVELLA is not recommended in pediatric patients.

8.5        Geriatric Use

In controlled clinical studies of SAVELLA, 402 patients were 60 years or older, and no overall differences in safety and efficacy were observed between these patients and younger patients.

In view of the predominant excretion of unchanged milnacipran via kidneys and the expected decrease in renal function with age, renal function should be considered prior to use of SAVELLA in the elderly [see Dosage and Administration ( 2.2)].

SNRIs, SSRIs, and SAVELLA, have been associated with cases of clinically significant hyponatremia in elderly patients, who may be at greater risk for this adverse event [see Warnings and Precautions ( 5.8)].