HalfLifeDB Drug half-life explorer

Half-life profile

Ketamine half-life calculator

Estimate how much Ketamine remains in your body over time using a first-order elimination model. Values are approximate and should not replace lab testing or medical advice.

Now estimated in body: 0.13 mg(0.1% of starting amount)Half-life used: 2.5 h

Pharmacokinetics at a glance

Mean half-life 2.5 hours

Typical detection windows

Detection windows are approximate and depend on dose, frequency, metabolism, specimen cutoffs and lab methods.

Matrix Window
blood Typically detectable for several hours and up to ~1 day after single use.
urine Parent drug and metabolites often detectable for 2–4 days in occasional users.
hair Can be detected for weeks to months, depending on hair length and pattern of use.

How this model treats Ketamine

The calculator uses a simple one-compartment model with first-order elimination. Every half-life, the remaining amount is halved. Real-world pharmacokinetics can be more complex (multi-compartment models, active metabolites, saturable metabolism).

Medically reviewed sources

  1. Rosenbaum SB et al. Ketamine. StatPearls (2024 update).
  2. Hijazi Y et al. Pharmacokinetics of ketamine in intensive care patients (2003).

Notes

This page is for educational and informational purposes only. It does not provide medical or legal advice and does not tell you whether you are safe to drive, work or pass a drug test.