Finasteride (Propecia, Proscar) and Ketamine Therapy | Tovani Health
Propecia (Finasteride) (also: Proscar) — 5-alpha reductase inhibitor (hair loss / BPH)
Verdict at Tovani Health
Compatible; post-finasteride syndrome and depression risk warrant careful baseline documentation.
Finasteride and ketamine are compatible. The relevant flag for KAP planning is post-finasteride syndrome — an FDA-acknowledged constellation of persistent depression, anxiety, and sexual dysfunction that some patients experience during or after finasteride therapy. The mechanism isn't fully characterized but neurosteroid (allopregnanolone) depletion is implicated. Patients in active depression treatment on finasteride deserve careful baseline mood documentation so we can honestly assess what KAP is doing for them.
If you take Propecia regularly and are considering at-home ketamine therapy, the combination is safe with monitoring or dose adjustment. This page covers the brief pharmacologic context and what we do at intake.
How Propecia interacts with ketamine
Finasteride inhibits 5-alpha reductase, reducing conversion of testosterone to dihydrotestosterone and lowering neurosteroid synthesis (including allopregnanolone). The neurosteroid effect is the proposed mechanism for the persistent depressive symptoms a subset of patients experience.
What we do at intake
Disclose dose, indication (hair vs BPH), and how long you have been on it. Tell us about any mood changes you have noticed since starting. Stopping finasteride is not straightforward for the post-finasteride syndrome population — coordinate with your prescriber.
Bottom line
Finasteride and ketamine are compatible. The relevant flag for KAP planning is post-finasteride syndrome — an FDA-acknowledged constellation of persistent depression, anxiety, and sexual dysfunction that some patients experience during or after finasteride therapy. The mechanism isn't fully characterized but neurosteroid (allopregnanolone) depletion is implicated. Patients in active depression treatment on finasteride deserve careful baseline mood documentation so we can honestly assess what KAP is doing for them.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Propecia (Finasteride) at intake. The eligibility check takes 5 minutes and gives you an honest answer about whether at-home ketamine fits your specific situation.
FL and NJ residents only. Benjamin Soffer, DO — Tovani Health.
Clinically reviewed
Reviewed by Benjamin Soffer, DO on May 19, 2026. Dr. Soffer is a board-certified physician (American Board of Internal Medicine) licensed in Florida and New Jersey, prescribing at-home ketamine therapy through Tovani Health.
This page is general information about how this medication interacts with at-home ketamine therapy at Tovani Health. It is not a substitute for medical advice from your prescribing physician about your specific situation. Always discuss medication changes with the doctor who prescribed them.