What the FDA labels say about taking them together
Dasatinib and ritonavir
Ritonavir's FDA label of July 23, 2026 names dasatinib in its drug interactions section; the dasatinib labels PlainMeds reads (3) do not name ritonavir. The ritonavir label: “… decrease in the dosage or an adjustment of the dosing interval of nilotinib and dasatinib may be necessary for patients requiring co-administration with strong CYP3A inhibitors such as NORVIR. …”
Check it at the source: the dasatinib FDA label on DailyMed (effective November 12, 2025, Alembic Pharmaceuticals Limited); the ritonavir FDA label on DailyMed (effective July 23, 2026, AbbVie Inc.).
What does the dasatinib label say about ritonavir?
Dasatinib's label (effective November 12, 2025) and its 2 other brand-application labels do not name ritonavir in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (DASATINIB), Alembic Pharmaceuticals Limited, effective November 12, 2025 (SPL set 645fcf26-1b2f-40c5-881b-8effe02defbd), via openFDA; the full label on DailyMed
What does the ritonavir label say about dasatinib?
Ritonavir label, drug interactionsConcomitant Drug Class/Drug Name: Anticancer Agents: abemaciclib, apalutamide, dasatinib, encorafenib, ibrutinib, ivosidenib, neratinib, nilotinib, venetoclax, vinblastine, vincristine; Effect on Concentration of Ritonavir or Concomitant Drug: ↑ anticancer agents ↓ ritonavir #; Clinical Comment: Apalutamide is contraindicated due to potential for loss of virologic response and possible resistance to NORVIR or to the class of protease inhibitors [see Contraindications () ]. Avoid co-administration of encorafenib or ivosidenib with NORVIR due to potential risk of serious adverse events such as QT interval prolongation. …
Source: FDA drug label (Norvir), AbbVie Inc., effective July 23, 2026 (SPL set 2849298e-de6e-47bb-8194-56e075b33fc3), 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
| Dasatinib | Ritonavir | |
|---|---|---|
| Labeled for | Leukemia, lymphoma and myeloma | HIV |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | $26.46 per tablet 100 mg tablet | $0.607 per tablet 100 mg tablet |
| Shortage now | No current entry | A presentation being discontinued |
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