Fetzima 20mg Capsules
Overview
What is this medicine?
How to Use This Medicine
To get the most benefit from your medication, follow your doctor's instructions carefully. Read all the information provided with your prescription and follow the instructions closely. Take your medication at the same time every day, with or without food. Swallow the tablet whole - do not chew, open, or crush it. Continue taking your medication as directed by your doctor or healthcare provider, even if you start to feel better.
Storing and Disposing of Your Medication
Store your medication at room temperature in a dry place, away from the bathroom. Keep all medications in a safe location, out of the reach of children and pets. Dispose of unused or expired medications properly. Do not flush them down the toilet or pour them down the drain unless instructed to do so. If you have questions about disposing of your medication, consult your pharmacist. You may also want to check if there are drug take-back programs in your area.
What to Do If You Miss a Dose
If you miss a dose, take it as soon as you remember. However, if it's close to the time for your next dose, skip the missed dose and resume your regular schedule. Do not take two doses at the same time or take extra doses to make up for a missed one.
Lifestyle & Tips
- Take Fetzima exactly as prescribed, usually once daily with or without food. Do not crush, chew, or open the capsule.
- Do not stop taking Fetzima suddenly without talking to your doctor, as this can cause withdrawal symptoms.
- Avoid alcohol while taking Fetzima, as it can worsen side effects.
- Be aware of potential side effects like dizziness or drowsiness, and avoid driving or operating machinery until you know how the medication affects you.
- Monitor your blood pressure regularly as advised by your doctor.
- Report any new or worsening symptoms of depression, suicidal thoughts, or unusual changes in behavior to your doctor immediately.
- Inform your doctor about all other medications, supplements, and herbal products you are taking, especially St. John's Wort, other antidepressants, or migraine medications (triptans).
Available Forms & Alternatives
Dosing & Administration
Adult Dosing
Condition-Specific Dosing:
Pediatric Dosing
Dose Adjustments
Renal Impairment:
Hepatic Impairment:
Pharmacology
Mechanism of Action
Pharmacokinetics
Absorption:
Distribution:
Elimination:
Pharmacodynamics
Safety & Warnings
BLACK BOX WARNING
Side Effects
Although rare, some people may experience severe and potentially life-threatening side effects while taking this medication. If you notice any of the following symptoms, contact your doctor immediately or seek emergency medical attention:
Signs of an allergic reaction: rash, hives, itching, red, swollen, blistered, or peeling skin (with or without fever), wheezing, tightness in the chest or throat, trouble breathing, swallowing, or talking, unusual hoarseness, or swelling of the mouth, face, lips, tongue, or throat
Signs of bleeding: vomiting or coughing up blood, vomit that resembles coffee grounds, blood in the urine, black, red, or tarry stools, bleeding from the gums, abnormal vaginal bleeding, unexplained bruises or bruises that enlarge, or uncontrollable bleeding
Signs of low sodium levels: headache, difficulty focusing, memory problems, confusion, weakness, seizures, or balance disturbances
Signs of high blood pressure: severe headache or dizziness, fainting, or changes in vision
Abnormal or rapid heartbeat
Seizures
Extreme fatigue or weakness
Urination difficulties
Sexual problems, including decreased libido, difficulty achieving orgasm, ejaculation issues, or erectile dysfunction (if you have concerns, discuss them with your doctor)
A rare but potentially life-threatening condition called serotonin syndrome may occur, especially if you are taking other medications that interact with this drug. Seek immediate medical attention if you experience:
Agitation
Balance disturbances
Confusion
Hallucinations
Fever
Abnormal or rapid heartbeat
Flushing
Muscle twitching or stiffness
Seizures
Shivering or shaking
Excessive sweating
Severe diarrhea, nausea, or vomiting
Severe headache
Other Possible Side Effects
Like all medications, this drug can cause side effects, although many people may not experience any or may only have mild symptoms. If you are bothered by any of the following side effects or if they persist, contact your doctor:
Nausea or vomiting
Constipation
* Excessive sweating
This is not an exhaustive list of potential side effects. If you have questions or concerns about side effects, consult your doctor. You can also report side effects to the FDA at 1-800-332-1088 or online at https://www.fda.gov/medwatch.
Seek Immediate Medical Attention If You Experience:
- Worsening depression or anxiety
- Thoughts about suicide or dying
- New or worsening irritability, agitation, or restlessness
- Panic attacks
- Insomnia (trouble sleeping)
- New or worsening aggressive behavior
- Acting on dangerous impulses
- An extreme increase in activity and talking (mania)
- Other unusual changes in behavior or mood
- Symptoms of serotonin syndrome (e.g., agitation, hallucinations, rapid heart rate, fever, sweating, muscle stiffness, twitching, loss of coordination, nausea, vomiting, diarrhea)
- Significant increase in blood pressure or heart rate
- Eye pain, changes in vision, or swelling or redness in or around the eye (signs of angle-closure glaucoma)
- Difficulty urinating or changes in urinary flow
- Unusual bleeding or bruising
- Seizures
- Severe allergic reaction (rash, hives, swelling, difficulty breathing)
Before Using This Medicine
It is essential to inform your doctor about the following conditions and circumstances to ensure safe treatment:
Any known allergies to this medication, its components, or other substances, including foods and drugs. Describe the allergic reaction and its symptoms.
Presence of kidney disease, as this may affect the medication's dosage or administration.
Diagnosis or risk of narrow-angle glaucoma, a condition that affects the eyes.
Current or recent use of certain medications, including:
+ Linezolid or methylene blue, as these may interact with this medication.
+ Drugs for depression or Parkinson's disease, such as isocarboxazid, phenelzine, tranylcypromine, selegiline, or rasagiline, taken within the last 14 days. Combining these medications can lead to very high blood pressure.
* Other health problems or medications, including prescription and over-the-counter drugs, natural products, and vitamins. This is not an exhaustive list, and it is crucial to disclose all relevant information.
To ensure your safety, consult your doctor and pharmacist about all your medications and health conditions. Do not initiate, stop, or adjust the dosage of any medication without first consulting your doctor to confirm that it is safe to do so.
Precautions & Cautions
Before engaging in activities that require your full attention, such as driving, wait until you understand how this medication affects you.
To minimize the risk of side effects, do not abruptly stop taking this medication without first consulting your doctor. If you need to discontinue use, your doctor will provide guidance on how to gradually taper off the medication.
As directed by your doctor, regularly schedule blood work and other laboratory tests to monitor your condition. Additionally, check your blood pressure and heart rate as instructed by your doctor.
While taking this medication, it is recommended that you avoid consuming alcohol. Before using marijuana, cannabis products, or prescription and over-the-counter medications that may cause drowsiness, consult with your doctor to discuss potential interactions.
Be aware that this medication may increase the risk of bleeding, which can be life-threatening in some cases. Consult with your doctor to discuss this risk.
Certain individuals may have a higher risk of developing eye problems while taking this medication. Your doctor may recommend an eye exam to assess your risk. If you experience eye pain, changes in vision, or swelling and redness around the eye, contact your doctor immediately.
This medication can cause low sodium levels, which can be life-threatening and lead to seizures, loss of consciousness, breathing difficulties, or death.
If you are 65 years or older, use this medication with caution, as you may be more susceptible to side effects.
If you are pregnant, planning to become pregnant, or breastfeeding, inform your doctor. Taking this medication during the third trimester of pregnancy may increase the risk of bleeding after delivery and potentially cause health problems in the newborn. Your doctor will help you weigh the benefits and risks of using this medication during pregnancy and breastfeeding.
Overdose Information
Overdose Symptoms:
- Tachycardia
- Hypertension
- Somnolence
- Nausea
- Vomiting
- Dizziness
- Seizures
- Serotonin syndrome
What to Do:
Seek immediate medical attention. Call 911 or Poison Control at 1-800-222-1222. There is no specific antidote for levomilnacipran overdose. Treatment should be symptomatic and supportive, including monitoring of cardiac rhythm and vital signs. Gastric lavage, activated charcoal, and osmotic cathartics may be considered. Due to the large volume of distribution, forced diuresis, dialysis, hemoperfusion, and exchange transfusion are unlikely to be beneficial.
Drug Interactions
Contraindicated Interactions
- Monoamine Oxidase Inhibitors (MAOIs) (e.g., phenelzine, tranylcypromine, selegiline, linezolid, methylene blue)
- Other serotonergic drugs (e.g., triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, buspirone, St. John's Wort) - concomitant use with MAOIs
Major Interactions
- Serotonergic drugs (e.g., SSRIs, other SNRIs, triptans, fentanyl, tramadol, lithium, St. John's Wort) - increased risk of serotonin syndrome
- Strong CYP3A4 inhibitors (e.g., ketoconazole, itraconazole, clarithromycin, ritonavir) - increased levomilnacipran exposure
- Anticoagulants/Antiplatelets (e.g., warfarin, aspirin, NSAIDs) - increased risk of bleeding
- Drugs that increase blood pressure or heart rate (e.g., stimulants, decongestants, other SNRIs) - additive effects
- Alcohol - may increase CNS effects and impair cognitive/motor skills
Moderate Interactions
- Moderate CYP3A4 inhibitors (e.g., erythromycin, diltiazem, verapamil) - potential for increased levomilnacipran exposure
- Drugs that cause hyponatremia (e.g., diuretics) - increased risk of SIADH
- Drugs that affect urinary outflow (e.g., alpha-1 blockers) - potential for urinary retention
Minor Interactions
- Not specifically identified as minor interactions with clinical significance requiring dosage adjustment in package insert.
Monitoring
Baseline Monitoring
Rationale: SNRIs can cause dose-dependent increases in blood pressure and heart rate.
Timing: Prior to initiating treatment.
Rationale: Risk of hyponatremia/SIADH, especially in elderly or those on diuretics.
Timing: Consider in at-risk patients.
Rationale: SNRIs can cause mydriasis, potentially precipitating an angle-closure attack.
Timing: Prior to initiating treatment in patients with anatomically narrow angles.
Rationale: Risk of activating mania/hypomania in undiagnosed bipolar disorder.
Timing: Prior to initiating treatment.
Routine Monitoring
Frequency: Regularly, especially during dose titration and periodically thereafter.
Target: Maintain within patient's normal range or acceptable limits.
Action Threshold: Significant or sustained increases warrant dose reduction or discontinuation.
Frequency: Especially during initial treatment (first few months) and dose changes.
Target: Improvement in depressive symptoms, absence of suicidal ideation/behavior.
Action Threshold: Worsening depression, emergence of suicidal thoughts/behaviors, or unusual changes in behavior require immediate re-evaluation.
Frequency: Regularly, especially in patients with risk factors for bipolar disorder.
Target: Absence of mania/hypomania.
Action Threshold: Development of manic symptoms requires discontinuation and re-evaluation.
Frequency: Periodically, especially in elderly, volume-depleted, or those on diuretics.
Target: 135-145 mEq/L
Action Threshold: Hyponatremia (<135 mEq/L) requires investigation and management.
Frequency: Regularly
Target: Normal urinary flow and frequency.
Action Threshold: Development of urinary hesitancy or retention requires investigation.
Symptom Monitoring
- Worsening depression
- Suicidal thoughts or behavior
- Unusual changes in behavior (e.g., agitation, irritability, anxiety, panic attacks, insomnia, impulsivity, aggression, akathisia, hypomania, mania)
- Headache
- Nausea
- Constipation
- Dizziness
- Insomnia
- Hyperhidrosis (excessive sweating)
- Tachycardia
- Hypertension
- Urinary hesitancy/retention
- Sexual dysfunction
- Serotonin syndrome symptoms (e.g., agitation, hallucinations, delirium, coma, tachycardia, labile blood pressure, dizziness, diaphoresis, flushing, hyperthermia, tremor, rigidity, myoclonus, hyperreflexia, incoordination, GI symptoms)
- Bleeding/bruising
Special Patient Groups
Pregnancy
Use during pregnancy should only be considered if the potential benefit justifies the potential risk to the fetus. Neonates exposed to SNRIs late in the third trimester have developed complications requiring prolonged hospitalization, respiratory support, and tube feeding. These complications can arise immediately upon delivery.
Trimester-Specific Risks:
Lactation
Levomilnacipran is excreted into human milk. The decision to breastfeed should consider the developmental and health benefits of breastfeeding, the mother's clinical need for Fetzima, and any potential adverse effects on the breastfed infant from Fetzima or from the underlying maternal condition. Monitor infants for agitation, irritability, poor feeding, and poor weight gain.
Pediatric Use
Safety and effectiveness have not been established in pediatric patients. Fetzima is not approved for use in pediatric patients. A Black Box Warning regarding increased risk of suicidal thoughts and behavior in children, adolescents, and young adults is present.
Geriatric Use
No overall differences in safety or effectiveness were observed between elderly patients and younger patients, but greater sensitivity of some older individuals cannot be ruled out. Elderly patients may be at increased risk for hyponatremia and falls. Dose adjustments for renal impairment are more likely to be needed in elderly patients.
Clinical Information
Clinical Pearls
- Fetzima is an SNRI with a unique pharmacological profile, having greater potency for norepinephrine reuptake inhibition than serotonin reuptake inhibition, which differentiates it from other SNRIs like venlafaxine or duloxetine.
- It is dosed once daily due to its extended-release formulation and relatively long half-life.
- Patients should be advised not to crush, chew, or open the capsules, as this will alter the extended-release properties and could lead to increased side effects.
- Blood pressure and heart rate monitoring are crucial, especially during dose titration, due to the noradrenergic effects.
- Discontinuation syndrome can occur if Fetzima is stopped abruptly; a gradual dose reduction is recommended.
- Consider the risk of serotonin syndrome when co-administering with other serotonergic agents.
- Be vigilant for symptoms of mania/hypomania in patients with undiagnosed bipolar disorder.
Alternative Therapies
- Other SNRIs (e.g., Venlafaxine, Duloxetine, Desvenlafaxine)
- SSRIs (e.g., Fluoxetine, Sertraline, Paroxetine, Citalopram, Escitalopram)
- Atypical antidepressants (e.g., Bupropion, Mirtazapine, Vortioxetine, Vilazodone)
- Tricyclic Antidepressants (TCAs)
- MAOIs (less common due to side effects and interactions)
- Psychotherapy (e.g., Cognitive Behavioral Therapy - CBT)
- Electroconvulsive Therapy (ECT) for severe or treatment-resistant depression