What the FDA labels say about taking them together
Castor oil and ixabepilone
Ixabepilone's FDA label of December 4, 2025 names castor oil in its contraindications section; the castor oil label PlainMeds reads does not name ixabepilone. The ixabepilone label: “CONTRAINDICATIONS IXEMPRA is contraindicated in patients who have: a neutrophil count <1500 cells/mm 3 or a platelet count <100,000 cells/mm 3. …”
Check it at the source: the castor oil FDA label on DailyMed (effective June 15, 2026); the ixabepilone FDA label on DailyMed (effective December 4, 2025, R-Pharm US Operating, LLC).
What does the castor oil label say about ixabepilone?
Castor oil's label (effective June 15, 2026) does not name ixabepilone in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Signature Care), Better Living Brands, LLC, effective June 15, 2026 (SPL set 4947cf4d-3ebd-4b66-9582-f141407aa300), via openFDA; the full label on DailyMed
What does the ixabepilone label say about castor oil?
Ixabepilone label, contraindicationsCONTRAINDICATIONS IXEMPRA is contraindicated in patients who have: a neutrophil count <1500 cells/mm 3 or a platelet count <100,000 cells/mm 3 [see Warnings and Precautions ( 5.2 )]. a history of severe hypersensitivity to agents containing Cremophor ® EL or its derivatives (e.g., polyoxyethylated castor oil) [see Warnings and Precautions ( 5.4 )].
Ixabepilone label, warnings and precautionsHypersensitivity Reactions IXEMPRA is contraindicated in patients with a history of a severe hypersensitivity reaction to agents containing Cremophor ® EL or its derivatives (eg, polyoxyethylated castor oil) [ see Contraindications ( 4 )].
Source: FDA drug label (IXEMPRA), R-Pharm US Operating, LLC, effective December 4, 2025 (SPL set 241f0b1e-8b95-470d-876f-bf1804daaf18), 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
| Castor oil | Ixabepilone | |
|---|---|---|
| Labeled for | Constipation | Breast cancer |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | $0.0193 per mL Castor oil | n/a |
| 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