Finasteride (Propecia) drug interactions
Finasteride (Propecia) · finasteride · by Multiple (Merck originated as Propecia)
Interaction lookup
Search by medication name or drug class to see clinically meaningful Finasteride (Propecia) interactions.
Saw palmetto
MinorClass: supplement
Theoretical additive 5-ARI effect; no documented harm but disclose to prescriber.
PSA tests
ModerateClass: lab interaction
Reduces PSA by ~50%. Tell screening providers to multiply by 2 for accurate prostate-cancer interpretation.
Editorial table from FDA labels + drug compendia. Not exhaustive. Discuss any concurrent medication, supplement, or condition with your prescriber before starting or stopping treatment.
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People also ask
Frequently asked
What medications interact with Finasteride (Propecia)?+
Finasteride has few clinically significant drug interactions. Can reduce PSA (prostate-specific antigen) levels by approximately 50%, which is important to flag to any doctor running prostate cancer screening — labs need to multiply PSA by 2 for accurate interpretation. No major interactions with statins, antihypertensives, or common cardiovascular drugs.
Can I take Finasteride (Propecia) with metformin?+
Finasteride (Propecia) and metformin are commonly co-prescribed without major interaction concerns. GI side effects may be additive in some patients.