thoughtscape NP Psychiatry · Patient education
Fluvoxamine
Luvox / Luvox CR
An SSRI commonly used for OCD. Check every medicine and supplement for interactions.
Draft for review · Clinical content has not been revalidated for this website.
Diagram: sigma-1 activity is supported experimentally; a separate anxiety or sleep benefit is unproven.
What it is used for
Current U.S. labels list obsessive-compulsive disorder (OCD). Depression and several anxiety disorders are other uses; ask what your prescription is treating.
Pediatric OCD evidence comes from IR studies at ages 8-17. ER has not been directly studied in children; its lowest strength may not suit a child starting treatment.
How it works
Fluvoxamine slows serotonin reuptake between brain cells. Changes over time are thought to help reduce obsessive thoughts and compulsive behaviors.
It also slows the breakdown of many other medicines. That is why your full medicine list matters when starting, changing, or stopping fluvoxamine.
What to expect over time
EARLY DAYS
Nausea, loose stools, or sleep changes may come before benefit. Tell your team if they are severe or persistent.
OVER WEEKS
Improvement builds gradually. Track time lost to obsessions and compulsions, not just whether a day feels better.
OCD REVIEW
An adequate trial may take 10-12 weeks. Keep follow-up; do not wait that long to report worsening mood or serious effects.
Taking your medication
IR tablets may be taken at bedtime or split morning and bedtime, depending on the dose. ER capsules are taken once nightly. Follow your own schedule.
Swallow ER capsules whole; do not crush, chew, or split them. Do not switch formulations or combine IR and ER yourself. Food is optional and may help nausea.
Avoid alcohol. Do not drive until you know the effects. Refill before running out and discuss missed doses or side effects rather than changing the plan yourself.
When to get help
Call promptly: suicidal thoughts, sudden mood worsening, marked agitation, or little sleep with unusual energy. Immediate danger: 911; U.S. crisis help: 988.
Emergency care: fever with confusion, sweating, and stiff or twitching muscles; collapse, seizure, trouble breathing, severe allergy, or blistering rash.
Urgent assessment: unusual bleeding, black stools, painful vision changes, palpitations, severe headache, confusion, weakness, or unsteadiness.
Early side effects
Nausea, diarrhea, sleepiness, or insomnia, jitteriness, headache, sweating, and tremor may occur. Food and a slower prescribed increase may help nausea.
Other effects to discuss
Sexual difficulties, appetite, or weight changes and feeling emotionally muted can occur. Feeling flat does not prove the dose is too high; discuss it.
What to keep track of
Review mood, sleep, OCD symptoms, and side effects early and after changes. Follow growth in children. Sodium, ECG, INR, or levels of interacting medicines may be needed according to your risks. Mood checks matter at every age, especially through age 24. Tell your team when smoking or other medicines change.
Before you start
Tell your prescriber about bipolar symptoms, seizures, liver disease, bleeding, low sodium, heart problems, narrow-angle glaucoma risk, pregnancy or breastfeeding. Bring every prescription, over-the-counter medicine, and supplement to the interaction review, including melatonin and caffeine. Do not start, stop, or change another medicine without checking: its dose may need review when fluvoxamine is stopped too.
Medicines & interactions
MAOIs, linezolid & IV methylene blue
Do not combine with antidepressant MAOIs; at least 14 days are needed in either direction. Urgent linezolid or IV methylene blue treatment requires clinician management.
Other prohibited combinations
Do not combine with tizanidine, ramelteon, alosetron, pimozide, or thioridazine. These interactions can be serious; check before taking a new prescription.
Clozapine, theophylline & sedatives
Clozapine and theophylline may need large dose changes and level checks. Alprazolam, diazepam, and other sedatives can cause excess sedation. Specialist planning is needed; do not adjust them yourself.
Serotonin medicines & supplements
Tramadol, triptans, other antidepressants, dextromethorphan cough products, and St. John's wort may add serotonin toxicity. Also check methadone, carbamazepine, and heart medicines.
Pain medicines & blood thinners
Ibuprofen, naproxen, aspirin, and anticoagulants add bleeding risk; warfarin may need closer INR testing. Ask before adding a pain reliever, and do not stop prescribed blood thinners yourself.
Everyday tips
Use reminders and keep the same prescribed daily schedule.
For OCD, include exposure and response prevention therapy.
Tell your pharmacist, dentist, and other clinicians about fluvoxamine.
Bring a short symptom and side-effect record to follow-up.
Your questions, answered
What if I miss a dose?
Take it when remembered unless the next is nearly due; then skip it. Never double. Missing doses can cause dizziness, nausea, or electric-shock sensations.
Can I stop when I feel better?
Plan a gradual taper with your prescriber. Withdrawal and relapse can occur; smaller reductions may be needed near the end. Do not use self-directed drug holidays.
What about coffee or energy drinks?
Fluvoxamine slows caffeine clearance. Your usual amount may cause more jitteriness or insomnia. Reduce excessive caffeine and discuss a sensible limit with your team.
What about pregnancy or breastfeeding?
Discuss benefits and risks; do not stop on your own. Newborn effects are possible with late exposure. If breastfeeding, ask about watching feeding, sleep, agitation, vomiting, or diarrhea.
Storage & safety
Keep tightly closed at room temperature, away from heat and moisture, securely away from children and pets. Never share; ask about pharmacy take-back. Overdose: Poison Help 1-800-222-1222 promptly. Collapse, seizure, trouble breathing, or inability to wake: 911.
About this information
For general information only; not a substitute for individualized medical advice. This sheet does not cover every risk or interaction. Ask your prescriber or pharmacist before changing how you take this medication.
Sources
Educational inclusion does not mean this medication or its indications are treated at this practice. Review the guide for your exact product with your prescriber or pharmacist.