What the FDA labels say about taking them together
Dexamethasone and lenacapavir
Lenacapavir's FDA label of August 27, 2026 names dexamethasone in its drug interactions section; the dexamethasone labels PlainMeds reads (4) do not name lenacapavir. The lenacapavir label: “Concomitant administration with systemic corticosteroids whose exposures are significantly increased by CYP3A inhibitors can increase the risk for Cushing's syndrome and adrenal suppression. …”
Check it at the source: the dexamethasone FDA label on DailyMed (effective June 6, 2025, Hikma Pharmaceuticals USA, Inc.); the lenacapavir FDA label on DailyMed (effective August 27, 2026, Gilead Sciences, Inc.).
What does the dexamethasone label say about lenacapavir?
Dexamethasone's label (effective June 6, 2025) and its 3 other brand-application labels do not name lenacapavir in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Dexamethasone Intensol), Hikma Pharmaceuticals USA, Inc., effective June 6, 2025 (SPL set b15200fb-1826-472b-a907-e677a272513b), via openFDA; the full label on DailyMed
What does the lenacapavir label say about dexamethasone?
Lenacapavir label, drug interactionsConcomitant Drug Class/Drug Name: Corticosteroids (systemic): cortisone/hydrocortisone dexamethasone; Effect on Concentration ↑ = Increase, ↓ = Decrease.: ↑ corticosteroids (systemic); Clinical Comment: Concomitant administration with systemic corticosteroids whose exposures are significantly increased by CYP3A inhibitors can increase the risk for Cushing's syndrome and adrenal suppression. Initiate with the lowest starting dose and titrate carefully while monitoring for safety.
Source: FDA drug label (Sunlenca), Gilead Sciences, Inc., effective August 27, 2026 (SPL set e5652804-29c4-40d7-aeb2-0142ed2a7b5b), 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
| Dexamethasone | Lenacapavir | |
|---|---|---|
| Labeled for | Asthma, Eczema (atopic dermatitis), Leukemia, lymphoma and myeloma, Herpes and shingles, Crohn's disease and ulcerative colitis, Multiple sclerosis, Osteoarthritis, Rheumatoid arthritis, Psoriasis, Allergies, Anemia, Pain | HIV |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $0.193 per tablet 4 mg tablet | n/a |
| Shortage now | In shortage | 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