Insulin and Ketamine: Safe to Combine?
Lantus (Insulin) (also: Humalog, Novolog, Tresiba, Toujeo, Levemir) — Hormone (diabetes management)
Verdict at Tovani Health
Fully compatible; session-day insulin coordination is fasting logistics, not a KAP interaction.
Insulin and ketamine have no clinically significant interaction. The practical consideration: KAP sessions involve fasting (typically 4-6 hours before) which changes the usual insulin dose-to-food relationship. Long-acting basal (Lantus, Tresiba, Levemir, Toujeo) typically continues normally. Mealtime rapid-acting (Humalog, Novolog, Apidra, Fiasp) you'll often hold for the pre-session fast and resume with the post-session meal. We work directly with your endocrinologist on the specific plan and never adjust insulin without your prescriber.
If you take Lantus regularly and are considering at-home ketamine therapy, the combination is generally safe at therapeutic doses. This page covers the brief pharmacologic context and what we do at intake.
How Lantus interacts with ketamine
Insulin replaces or supplements endogenous insulin production. No direct ketamine PK interaction.
What we do at intake
Disclose your insulin regimen (basal, mealtime, sliding scale, pump). Bring fast-acting glucose. Tell us your endocrinologist's contact — we coordinate session-day insulin with them, not unilaterally.
Bottom line
Insulin and ketamine have no clinically significant interaction. The practical consideration: KAP sessions involve fasting (typically 4-6 hours before) which changes the usual insulin dose-to-food relationship. Long-acting basal (Lantus, Tresiba, Levemir, Toujeo) typically continues normally. Mealtime rapid-acting (Humalog, Novolog, Apidra, Fiasp) you'll often hold for the pre-session fast and resume with the post-session meal. We work directly with your endocrinologist on the specific plan and never adjust insulin without your prescriber.
Ready to find out if at-home ketamine fits your situation?
We’ll note that you’re on Lantus (Insulin) 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 22, 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.