Ketamine Troches and Lozenges, Explained

If you've compared ketamine providers, you've seen the word troche (rhymes with "smokey"): a small compounded lozenge that dissolves in your mouth. Troches — along with rapid-dissolve tablets — are how nearly all at-home and maintenance ketamine is prescribed. Here's what they are and how they actually compare to clinic infusions.

What a troche is

A troche is a small, flavored lozenge made by a compounding pharmacy to a prescriber's specification — ketamine isn't commercially manufactured in oral antidepressant form, so each prescription is custom-made. You hold it under your tongue or against your cheek for 10–15 minutes so the drug absorbs through the oral tissue, then (depending on your prescriber's instructions) spit or swallow the remaining saliva.

That spit-or-swallow instruction isn't trivia. Ketamine absorbed through the mouth's lining enters the bloodstream directly; ketamine you swallow gets processed by the liver first, which converts much of it into norketamine — a metabolite with its own effects that some patients find heavier or groggier. Prescribers use the instruction to tune the experience.

How troches compare to IV ketamine

• Bioavailability. IV delivers 100% of the dose to your bloodstream. Sublingual absorption is commonly estimated around 25–30%. That's why troche doses look so much bigger on paper (often 100–400+ mg) than IV doses (typically ~0.5 mg/kg, i.e. 35–60 mg for many adults) — most of the troche never reaches circulation.
• Onset and intensity. Infusions ramp up within minutes and are adjustable in real time. Troches come on gradually over 15–30 minutes, peak gently, and can't be dialed back once taken. Most people describe the experience as noticeably softer than an infusion — see IV vs. IM ketamine for the injectable comparison.
• Consistency. IV dosing is exact. Oral absorption varies with technique, mouth dryness, and whether you ate — the same troche can feel different on different days.
• Cost. Troches are far cheaper: compounded lozenges cost a fraction of an infusion session, which is why maintenance protocols so often switch to them after an IV series. Insurance still generally doesn't cover them (details here).

How prescribers typically use them

Three common patterns:

1. Maintenance after infusions. The most established pattern: an initial IV series at a clinic, then periodic troches at home to sustain the response.
2. Primary at-home treatment. Telehealth programs prescribe troches as the main treatment — usually one to two sessions weekly with tapering over time. Our at-home ketamine guide covers how those programs work and who they suit.
3. Ketamine-assisted psychotherapy (KAP). Some therapists' offices use a troche in-session at moderate doses, with the therapy happening during and after the medicine window.

Safety notes specific to oral ketamine

The general cautions for ketamine apply (blood pressure elevation, dissociation, no driving the rest of the day, contraindications like uncontrolled hypertension or a history of psychosis). Troches add a few of their own:

• Nausea is more common with swallowed ketamine; taking it on an empty stomach helps, and some prescribers add an anti-nausea medication.
• Having a supply at home requires discipline. Dose escalation between check-ins is the most common way home treatment goes wrong. Good programs count doses and track refills.
• Bladder irritation (urinary frequency, urgency, pain) is a known effect of frequent heavy ketamine exposure. At prescribed antidepressant doses it's uncommon, but report urinary symptoms to your prescriber immediately — continuing to dose through them is how lasting damage happens.
• Store them like the controlled substance they are — locked away from children, teens, and guests.

Questions to ask before accepting a troche prescription

1. What dose, how often, and what's the plan for tapering down?
2. Spit or swallow — and why, for me?
3. How will we measure whether it's working (symptom scales, check-in frequency)?
4. What's your policy on refills and dose increases?
5. Who do I contact if I have a bad session or side effects?

Bottom line

Troches are the affordable, flexible workhorse of modern ketamine treatment — gentler and cheaper than infusions, less precise and less supervised. They shine as maintenance after clinic treatment and as an access path when infusions aren't feasible. If you're starting from scratch, many clinicians still consider a supervised series the gold standard before transitioning home; you can find clinics near you to talk through both options.