What the FDA labels say about taking them together
Acetaminophen and finasteride
Finasteride's FDA label of March 18, 2026 names acetaminophen in its drug interactions section; the acetaminophen labels PlainMeds reads (4) do not name finasteride.
Check it at the source: the acetaminophen FDA label on DailyMed (effective November 13, 2024, Kenvue Brands LLC); the finasteride FDA label on DailyMed (effective March 18, 2026, Organon LLC).
What does the acetaminophen label say about finasteride?
Acetaminophen's label (effective November 13, 2024) and its 3 other brand-application labels do not name finasteride in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Tylenol 8 HR Arthritis Pain), Kenvue Brands LLC, effective November 13, 2024 (SPL set 3af22fc8-e4e0-4863-8696-6bc1257047cb), via openFDA; the full label on DailyMed
What does the finasteride label say about acetaminophen?
Finasteride label, drug interactionsAlthough specific interaction studies were not performed, PROSCAR was concomitantly used in clinical studies with acetaminophen, acetylsalicylic acid, α-blockers, angiotensin-converting enzyme (ACE) inhibitors, analgesics, anti-convulsants, beta-adrenergic blocking agents, diuretics, calcium channel blockers, cardiac nitrates, HMG-CoA reductase inhibitors, nonsteroidal anti-inflammatory drugs (NSAIDs), benzodiazepines, H 2 antagonists and quinolone anti-infectives without evidence of clinically significant adverse interactions.
Propecia label (Organon LLC, October 14, 2024), drug interactionsAlthough specific interaction studies were not performed, finasteride doses of 1 mg or more were concomitantly used in clinical studies with acetaminophen, acetylsalicylic acid, α-blockers, analgesics, angiotensin-converting enzyme (ACE) inhibitors, anticonvulsants, benzodiazepines, beta blockers, calcium-channel blockers, cardiac nitrates, diuretics, H 2 antagonists, HMG-CoA reductase inhibitors, prostaglandin synthetase inhibitors (also referred to as NSAIDs), and quinolone anti-infectives without evidence of clinically significant adverse interactions.
Source: FDA drug label (Propecia, NDA020788), Organon LLC, effective October 14, 2024 (SPL set 6f904709-65aa-44ce-b144-b4c8a0416e36), via openFDA
Source: FDA drug label (PROSCAR), Organon LLC, effective March 18, 2026 (SPL set 6f988153-fc74-4ca4-b29a-111f750c4a4b), 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
| Acetaminophen | Finasteride | |
|---|---|---|
| Labeled for | Fever, Cough and cold, Pain | Enlarged prostate (BPH) |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $0.0339 per unit 500 mg caplet | $0.0688 per tablet 5 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