What the FDA labels say about taking them together
Dimethyl sulfoxide and verteporfin
Verteporfin's FDA label of August 27, 2025 names dimethyl sulfoxide in its drug interactions section; the dimethyl sulfoxide label PlainMeds reads does not name verteporfin. The verteporfin label: “Compounds that quench active oxygen species or scavenge radicals, such as dimethyl sulfoxide, β-carotene, ethanol, formate and mannitol, would be expected to decrease VISUDYNE activity.”
Check it at the source: the dimethyl sulfoxide FDA label on DailyMed (effective March 17, 2021, Mylan Institutional LLC); the verteporfin FDA label on DailyMed (effective August 27, 2025, Bausch Health US LLC).
What does the dimethyl sulfoxide label say about verteporfin?
Dimethyl sulfoxide's label (effective March 17, 2021) does not name verteporfin in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (RIMSO-50), Mylan Institutional LLC, effective March 17, 2021 (SPL set 58b25d79-78f2-4953-b0c6-61658dc4ef0d), via openFDA; the full label on DailyMed
What does the verteporfin label say about dimethyl sulfoxide?
Verteporfin label, drug interactionsCompounds that quench active oxygen species or scavenge radicals, such as dimethyl sulfoxide, β-carotene, ethanol, formate and mannitol, would be expected to decrease VISUDYNE activity.
Source: FDA drug label (Visudyne), Bausch Health US LLC, effective August 27, 2025 (SPL set 952f4c80-50b1-4308-9ee6-311ffefb13df), 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
| Dimethyl sulfoxide | Verteporfin | |
|---|---|---|
| Labeled for | n/a | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | n/a | 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