What the FDA labels say about taking them together
Albendazole and theophylline
Albendazole's FDA label of September 30, 2019 names theophylline in its drug interactions section; the theophylline label PlainMeds reads does not name albendazole. The albendazole label: “Albendazole induces cytochrome P450 1A in human hepatoma cells; therefore, it is recommended that plasma concentrations of theophylline be monitored during and after treatment.”
Check it at the source: the albendazole FDA label on DailyMed (effective September 30, 2019, Amneal Pharmaceuticals of New York LLC); the theophylline FDA label on DailyMed (effective March 10, 2026, Strides Pharma Science Limited).
What does the albendazole label say about theophylline?
Albendazole label, drug interactionsAlbendazole induces cytochrome P450 1A in human hepatoma cells; therefore, it is recommended that plasma concentrations of theophylline be monitored during and after treatment.
Source: FDA drug label (Albendazole), NDA020666 (Impax Labs Inc), as published by Amneal Pharmaceuticals of New York LLC, effective September 30, 2019 (SPL set 06b5eefc-0b95-4862-b9b6-770063f2adf0), via openFDA; the full label on DailyMed
What does the theophylline label say about albendazole?
Theophylline's label (effective March 10, 2026) does not name albendazole in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Theophylline), Strides Pharma Science Limited, effective March 10, 2026 (SPL set b7a90ccf-9c32-40cc-9008-7e55b3da4dfd), 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
| Albendazole | Theophylline | |
|---|---|---|
| Labeled for | n/a | Asthma |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $4.15 per tablet 200 mg tablet | $0.330 per tablet 300 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