What the FDA labels say about taking them together
Benzalkonium and latanoprost
Latanoprost's FDA label (Xalatan) of May 15, 2023 names benzalkonium in its contraindications section; the benzalkonium label PlainMeds reads does not name latanoprost.
Check it at the source: the benzalkonium FDA label on DailyMed (effective November 19, 2025); the latanoprost FDA label on DailyMed (effective December 18, 2025, Sun Pharmaceutical Industries, Inc.).
What does the benzalkonium label say about latanoprost?
Benzalkonium's label (effective November 19, 2025) does not name latanoprost in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Dial Antibacterial Hydrating Coconut Milk), Henkel Corporation, effective November 19, 2025 (SPL set 43f9be89-b434-75da-e063-6294a90a1864), via openFDA; the full label on DailyMed
What does the latanoprost label say about benzalkonium?
Xalatan label (Viatris Specialty LLC, May 15, 2023), contraindicationsCONTRAINDICATIONS Known hypersensitivity to latanoprost, benzalkonium chloride, or any other ingredients in this product.
Xalatan label (Viatris Specialty LLC, May 15, 2023), warnings and precautionsContact Lens Use XALATAN contains benzalkonium chloride, which may be absorbed by contact lenses.
Source: FDA drug label (Xalatan, NDA020597), Viatris Specialty LLC, effective May 15, 2023 (SPL set a98595b3-9f47-48e0-b18d-550a2095f264), via openFDA
Source: FDA drug label (XELPROS), Sun Pharmaceutical Industries, Inc., effective December 18, 2025 (SPL set 34ad5cf6-4df0-4104-bddd-4c7631133ded), 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
| Benzalkonium | Latanoprost | |
|---|---|---|
| Labeled for | n/a | Glaucoma |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | n/a | $1.58 per mL 0.005% eye drops |
| 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