What the FDA labels say about taking them together
Codeine and oxycodone
Codeine's FDA label of December 22, 2025 names oxycodone in its drug interactions section; oxycodone's label does not name codeine itself but warns about its class (Opioids (opioid agonists)). The codeine label: “MAOI interactions with opioids may manifest as serotonin syndrome or opioid toxicity.”
Check it at the source: the codeine FDA label on DailyMed (effective December 22, 2025, Hikma Pharmaceuticals USA Inc.); the oxycodone FDA label on DailyMed (effective May 6, 2026, Rhodes Pharmaceuticals LLC).
What does the codeine label say about oxycodone?
Codeine label, drug interactionsMonoamine Oxidase Inhibitors (MAOIs) Clinical Impact: MAOI interactions with opioids may manifest as serotonin syndrome or opioid toxicity (…). Intervention: Do not use Codeine Sulfate Tablets in patients taking MAOIs or within 14 days of stopping such treatment. If urgent use of an opioid is necessary, use test doses and frequent titration of small doses of other opioids (such as oxycodone, hydrocodone, oxymorphone, hydrocodone, or buprenorphine) …
Source: FDA drug label (Codeine sulfate), Hikma Pharmaceuticals USA Inc., effective December 22, 2025 (SPL set 010905f9-3bcb-4b50-9fe8-a3ad0010f14c), via openFDA; the full label on DailyMed
What does the oxycodone label say about codeine?
Oxycodone's label does not name codeine itself; it warns about its class (Opioids (opioid agonists)):
Oxycodone label, boxed warningTo reduce the risk of respiratory depression, proper dosing and titration of oxycodone hydrochloride tablets are essential. ( 5.2 ) Accidental ingestion of oxycodone hydrochloride tablets, especially by children, can result in a fatal overdose of oxycodone. ( 5.2 ) Concomitant use of opioids with benzodiazepines or other central nervous system (CNS) depressants, including alcohol, may result in profound sedation, respiratory depression, coma, and death.
Oxycodone label, warnings and precautionsLife-Threatening Respiratory Depression Serious, life-threatening, or fatal respiratory depression has been reported with the use of opioids, even when used as recommended.
Source: FDA drug label (Oxycodone Hydrochloride), Rhodes Pharmaceuticals LLC, effective May 6, 2026 (SPL set a5162476-1217-41c0-bc7e-0a0f123f069f), 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
| Codeine | Oxycodone | |
|---|---|---|
| Labeled for | Pain | Pain |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $0.726 per tablet 30 mg tablet | $0.0884 per tablet 5 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