What the FDA labels say about taking them together
Morphine and trazodone
Morphine's FDA label of July 13, 2026 names trazodone in its drug interactions section; the trazodone labels PlainMeds reads (2) do not name morphine. The morphine label: “The concomitant use of opioids with other drugs that affect the serotonergic neurotransmitter system has resulted in serotonin syndrome.”
Check it at the source: the morphine FDA label on DailyMed (effective July 13, 2026, Bryant Ranch Prepack); the trazodone FDA label on DailyMed (effective January 22, 2026, Zydus Pharmaceuticals USA Inc.).
What does the morphine label say about trazodone?
Morphine label, drug interactionsSerotonergic Drugs Clinical Impact: The concomitant use of opioids with other drugs that affect the serotonergic neurotransmitter system has resulted in serotonin syndrome. … 5-HT3 receptor antagonists, drugs that effect the serotonin neurotransmitter system (e.g., mirtazapine, trazodone, tramadol), certain muscle relaxants (i.e., cyclobenzaprine, metaxalone), monoamine oxidase (MAO) inhibitors (those intended to treat psychiatric disorders and also others, such as linezolid and …
Source: FDA drug label (Ms Contin, NDA019516), Rhodes Pharmaceuticals LLC, effective August 14, 2026 (SPL set c354b3bf-86c0-4bb8-8b1f-be2164942698), via openFDA
Source: FDA drug label (Morphine sulfate), ANDA078761 (Sun Pharm Inds Ltd), as published by Bryant Ranch Prepack, effective July 13, 2026 (SPL set 595243fe-a4b1-479a-99d6-a084a4181891), via openFDA; the full label on DailyMed
What does the trazodone label say about morphine?
Trazodone's label (effective January 22, 2026) and its 1 other brand-application label do not name morphine in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Trazodone Hydrochloride), Zydus Pharmaceuticals USA Inc., effective January 22, 2026 (SPL set 704aebf9-2fff-4ef3-8323-9ff0d7f0ffd9), 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
| Morphine | Trazodone | |
|---|---|---|
| Labeled for | Pain | Depression |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $0.226 per tablet 15 mg tablet | $0.0307 per tablet 50 mg tablet |
| Shortage now | In shortage | 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