What the FDA labels say about taking them together
Clomipramine and linezolid
Clomipramine's FDA label of November 26, 2024 names linezolid in its contraindications section; linezolid's label does not name clomipramine itself but warns about its class (Tricyclic antidepressants). The clomipramine label: “Starting clomipramine hydrochloride capsules in a patient who is being treated with linezolid or intravenous methylene blue is also contraindicated because of an increased risk of serotonin syndrome.”
Check it at the source: the clomipramine FDA label on DailyMed (effective November 26, 2024); the linezolid FDA label on DailyMed (effective June 19, 2026, Hospira, Inc.).
What does the clomipramine label say about linezolid?
Clomipramine label, contraindicationsStarting clomipramine hydrochloride capsules in a patient who is being treated with linezolid or intravenous methylene blue is also contraindicated because of an increased risk of serotonin syndrome ( see WARNINGS and DOSAGE AND ADMINISTRATION ).
Clomipramine label, warningsSerotonin Syndrome The development of a potentially life-threatening serotonin syndrome has been reported with SNRIs and SSRIs, including clomipramine hydrochloride capsules, alone but particularly with concomitant use of other serotonergic drugs (including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan, buspirone, and St. John's Wort) and with drugs that impair metabolism of serotonin (in particular, MAOIs, both those intended to treat psychiatric disorders and also others, such as linezolid and intravenous methylene blue).
Source: FDA drug label (CLOMIPRAMINE HYDROCHLORIDE), SpecGx LLC, effective November 26, 2024 (SPL set d7cee3fa-d05c-4702-8f75-f446627bdb49), via openFDA; the full label on DailyMed
What does the linezolid label say about clomipramine?
Linezolid's label does not name clomipramine itself; it warns about its class (Tricyclic antidepressants):
Linezolid label, warnings and precautionsSpontaneous reports of serotonin syndrome including fatal cases associated with the concomitant use of linezolid and serotonergic agents have been reported. Commonly used serotonergic agents include serotonin reuptake inhibitors, serotonin-norepinephrine reuptake inhibitors, tricyclic antidepressants, buspirone, serotonin 5-HT1 receptor agonists (triptans), and opioids, including meperidine.
Linezolid label, warnings and precautionsSpontaneous reports of serotonin syndrome including fatal cases associated with the concomitant use of ZYVOX and serotonergic agents have been reported. Commonly used serotonergic agents include serotonin reuptake inhibitors, serotonin-norepinephrine reuptake inhibitors, tricyclic antidepressants, buspirone, serotonin 5‑HT1 receptor agonists (triptans), and opioids, including meperidine.
Source: FDA drug label (Linezolid), Hospira, Inc., effective June 19, 2026 (SPL set c401f1a8-cc37-461b-bfef-f2e156629bf8), via openFDA; the full label on DailyMed
These are the labels' own sentences. PlainMeds does not grade interactions; a pharmacist or prescriber can say what they mean for one person's medicines.
Both medicines on the record
| Clomipramine | Linezolid | |
|---|---|---|
| Labeled for | n/a | Bacterial infections |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $0.189 per capsule 25 mg capsule | $1.44 per tablet 600 mg tablet |
| Shortage now | No current entry | No current entry |
Source: FDA NDC Directory, CMS NADAC of October 7, 2026 and the FDA Drug Shortage Database (FDA files October 8, 2026)
What next?
- Check more medicines together
- up to five at once