What the FDA labels say about taking them together
Prednisolone and ritonavir
Ritonavir's FDA label of July 23, 2026 names prednisolone in its drug interactions section; the prednisolone labels PlainMeds reads (4) do not name ritonavir. The ritonavir label: “… adrenal suppression.Alternative corticosteroids including beclomethasone and prednisolone should be considered, particularly for long-term use.”
Check it at the source: the prednisolone FDA label on DailyMed (effective June 25, 2026, PAI Holdings, LLC dba PAI Pharma); the ritonavir FDA label on DailyMed (effective July 23, 2026, AbbVie Inc.).
What does the prednisolone label say about ritonavir?
Prednisolone's label (effective June 25, 2026) and its 3 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 (PrednisoLONE Sodium Phosphate), PAI Holdings, LLC dba PAI Pharma, effective June 25, 2026 (SPL set d1f937e7-fed5-4079-bd52-5d930b34ae9f), via openFDA; the full label on DailyMed
What does the ritonavir label say about prednisolone?
Ritonavir label, drug interactionsConcomitant Drug Class/Drug Name: Systemic/Inhaled/ Nasal/Ophthalmic Corticosteroids: e.g., betamethasone budesonide ciclesonide dexamethasone fluticasone methylprednisolone mometasone prednisone triamcinolone; Effect on Concentration of Ritonavir or Concomitant Drug: ↑ glucocorticoids; Clinical Comment: Coadministration with corticosteroids whose exposures are significantly increased by strong CYP3A inhibitors can increase the risk for Cushing’s syndrome and adrenal suppression.Alternative corticosteroids including beclomethasone and prednisolone (whose PK and/or PD are less affected by strong CYP3A inhibitors relative to other studied steroids) should be considered, particularly for …
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
| Prednisolone | Ritonavir | |
|---|---|---|
| Labeled for | Anemia, Leukemia, lymphoma and myeloma, Multiple sclerosis, Osteoarthritis, Asthma, Allergies, Herpes and shingles, Crohn's disease and ulcerative colitis, Eczema (atopic dermatitis), Organ transplant rejection | HIV |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | $4.72 per mL 1% eye drop | $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