What the FDA labels say about taking them together
Moxifloxacin and vardenafil
Vardenafil's FDA label of January 5, 2026 names moxifloxacin in its warnings and precautions section; the moxifloxacin labels PlainMeds reads (3) do not name vardenafil. The vardenafil label: “In a study of the effect of vardenafil on QT interval in 59 healthy males, therapeutic (10 mg) and supratherapeutic (80 mg) doses of vardenafil and the active control moxifloxacin (400 mg) produced similar increases in …”
Check it at the source: the moxifloxacin FDA label on DailyMed (effective March 17, 2026, Macleods Pharmaceuticals Limited); the vardenafil FDA label on DailyMed (effective January 5, 2026, Zydus Pharmaceuticals USA Inc.).
What does the moxifloxacin label say about vardenafil?
Moxifloxacin's label (effective March 17, 2026) and its 2 other brand-application labels do not name vardenafil in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Moxifloxacin), Macleods Pharmaceuticals Limited, effective March 17, 2026 (SPL set 182ecd0f-714f-42f0-9b16-fb604cf15786), via openFDA; the full label on DailyMed
What does the vardenafil label say about moxifloxacin?
Vardenafil label, warnings and precautionsIn a study of the effect of vardenafil on QT interval in 59 healthy males [see Clinical Pharmacology ( 12.2 )], therapeutic (10 mg) and supratherapeutic (80 mg) doses of vardenafil and the active control moxifloxacin (400 mg) produced similar increases in QT c interval.
Source: FDA drug label (VARDENAFIL), Zydus Pharmaceuticals USA Inc., effective January 5, 2026 (SPL set 5876e062-e604-42a7-99c3-5da30b8dac06), 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
| Moxifloxacin | Vardenafil | |
|---|---|---|
| Labeled for | Bacterial infections | Erectile dysfunction |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $1.60 per mL 0.5% eye drops | $2.79 per tablet 20 mg tablet |
| Shortage now | A presentation being discontinued | 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