Overview
11 DESCRIPTION Milnacipran hydrochloride is a selective norepinephrine and serotonin reuptake inhibitor; it inhibits norepinephrine uptake with greater potency than serotonin. It is a racemic mixture with the chemical name: (±)-[1R(S),2S(R)]-2-(aminomethyl)-N,N-diethyl-1-phenylcyclopropanecarboxamide hydrochloride.
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action The exact mechanism of the central pain inhibitory action of milnacipran and its ability to improve the symptoms of fibromyalgia in humans are unknown. Preclinical studies have shown that milnacipran is a potent inhibitor of neuronal norepinephrine and serotonin reuptake; milnacipran inhibits norepinephrine uptake with approximately 3-fold higher potency in vitro than serotonin without directly affecting the uptake of dopamine or other neurotransmitters. Milnacipran has no significant affinity for serotonergic (5-HT1-7), α- and β-adrenergic, muscarinic (M1-5), histamine (H1-4), dopamine (D1-5), opiate, benzodiazepine, and γ-aminobutyric acid (GABA) receptors in vitro.
Indications
- 1 INDICATIONS AND USAGE SAVELLA is indicated for the management of fibromyalgia. SAVELLA is not approved for use in pediatric patients [see Use in Specific Populations ( 8.4 )] . SAVELLA ® is a selective serotonin and norepinephrine reuptake inhibitor (SNRI) indicated for the management of fibromyalgia ( 1 ). SAVELLA is not approved for use in pediatric patients ( 1 ).
Common Doses
- 12.5 mg
- 25 mg
- 50 mg
- 100 mg
Dosage
2 DOSAGE AND ADMINISTRATION SAVELLA is given orally with or without food. Taking SAVELLA with food may improve the tolerability of the drug. Administer SAVELLA in two divided doses per day ( 2.1 ). Based on efficacy and tolerability, dosing may be titrated according to the following schedule ( 2.1 ): 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) Recommended dose is 100 mg/day ( 2.1 ). May be increased to 200 mg/day based on individual patient response ( 2.1 ).
Black Box Warning
WARNING: SUICIDALITY AND ANTIDEPRESSANT DRUGS SAVELLA is a selective serotonin and norepinephrine reuptake inhibitor (SNRI), similar to some drugs used for the treatment of depression and other psychiatric disorders. Antidepressants increased the risk compared to placebo of suicidal thinking and behavior (suicidality) in children, adolescents, and young adults in short-term studies of major depressive disorder (MDD) and other psychiatric disorders. Anyone considering the use of such drugs in a child, adolescent, or young adult must balance this risk with the clinical need.
Contraindications
- 4 CONTRAINDICATIONS Serotonin Syndrome and MAOIs: Do not use MAOIs intended to treat psychiatric disorders with SAVELLA or within 5 days of stopping treatment with SAVELLA. Do not use SAVELLA within 14 days of stopping an MAOI intended to treat psychiatric disorders. In addition, do not start SAVELLA in a patient who is being treated with linezolid or intravenous methylene blue ( 4.1 , 5.2 ). 4.1 Monoamine Oxidase Inhibitors (MAOIs) The use of MAOIs intended to treat psychiatric disorders with SAVELLA or within 5 days of stopping treatment with SAVELLA is contraindicated because of an...
Side Effects
- 6 ADVERSE REACTIONS The most frequently occurring adverse reactions (≥ 5% and greater than placebo) were nausea, headache, constipation, dizziness, insomnia, hot flush, hyperhidrosis, vomiting, palpitations, heart rate increased, dry mouth, and hypertension ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact AbbVie at 1-800-678-1605 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trial s Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in...
Interactions
- 7 DRUG INTERACTIONS Milnacipran undergoes minimal CYP450 related metabolism, with the majority of the dose excreted unchanged in urine (55%) and has a low binding to plasma proteins (13%). In vitro and in vivo studies showed that SAVELLA is unlikely to be involved in clinically significant pharmacokinetic drug interactions [see Pharmacokinetics in Special Populations ( 12.3 )] . SAVELLA is unlikely to be involved in clinically significant pharmacokinetic drug interactions ( 7 ). Pharmacodynamic interactions of SAVELLA with other drugs can occur ( 7 ). 7.