Taking Tadalafil With Ketamine: What to Know
Cialis (Tadalafil) (also: Adcirca) — PDE5 inhibitor
Verdict at Tovani Health
Compatible; same BP-stacking considerations as sildenafil, with much longer duration.
Tadalafil and ketamine are compatible. The clinical considerations are the same as sildenafil: vasodilation plus ketamine's transient pressor response means BP fluctuations during the session window. Tadalafil's distinguishing feature is its much longer half-life (17.5 hours vs sildenafil's 4 hours), so the timing window for interaction is longer. As with sildenafil, absolute contraindication with nitrates applies regardless of KAP.
If you take Cialis regularly and are considering at-home ketamine therapy, the combination is safe with monitoring or modest dose adjustment. This page covers the brief pharmacologic context and what we do at intake.
How Cialis interacts with ketamine
Tadalafil inhibits phosphodiesterase-5 with a much longer duration of action than sildenafil. Used for ED and benign prostatic hyperplasia (low daily dose) or pulmonary hypertension (Adcirca).
What we do at intake
Disclose use, dose, and frequency. Tell us about any nitrate medications. For daily-dose tadalafil (BPH), the steady-state interaction matters more than timing.
Bottom line
Tadalafil and ketamine are compatible. The clinical considerations are the same as sildenafil: vasodilation plus ketamine's transient pressor response means BP fluctuations during the session window. Tadalafil's distinguishing feature is its much longer half-life (17.5 hours vs sildenafil's 4 hours), so the timing window for interaction is longer. As with sildenafil, absolute contraindication with nitrates applies regardless of KAP.
Frequently Asked Questions
Can I take Cialis with ketamine?
Yes, with monitoring. Tadalafil and ketamine are compatible. The main consideration is BP fluctuation during the session, since vasodilation from tadalafil meets ketamine's transient pressor response.
Does tadalafil interact with ketamine?
Tadalafil and ketamine are compatible with monitoring. Tadalafil's distinguishing feature versus sildenafil is its much longer half-life (17.5 vs 4 hours), so the timing window for BP interaction is longer.
Is Cialis safe to take before a ketamine session?
Yes, with planning. Disclose your dose and timing. For daily-dose tadalafil (BPH), the steady-state interaction matters more than session-day timing.
Are there medications I can't combine with Cialis and ketamine?
Nitrates are an absolute contraindication with tadalafil regardless of KAP. Tell us about any nitrate medications you take.
How long does tadalafil affect ketamine session timing?
Tadalafil's effect lasts up to 36 hours, much longer than sildenafil's 4-hour window. We plan blood pressure monitoring around this longer duration.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Cialis (Tadalafil) 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.
Sources
The verdict and clinical guidance on this page are based on the following peer-reviewed literature and FDA prescribing information.
- PDE5 inhibitors: considerations for preference and long-term adherence. Smith WB 2nd, McCaslin IR, Gokce A. International Journal of Clinical Practice. 2013. PMID: 23869678
- Blood pressure safety of subanesthetic ketamine for depression: A report on 684 infusions. Riva-Posse P, Reiff CM, Edwards JA. Journal of Affective Disorders. 2018. PMID: 29525051
Clinically reviewed
Reviewed by Benjamin Soffer, DO on May 17, 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.