The Pharmacodynamics of Ketamine in the Breast Milk of Lactating Women:
The Pharmacodynamics of Ketamine in the Breast Milk of Lactating Women:
Quantification of Ketamine in Breast Milk at 3 hour Intervals up to 30 hours-- obtained from
 lactating women who receive 2 different Intramuscular injections of ketamine on two separate
 days at least 5 days apart.
Quantification of Ketamine in Breast Milk at 3 hour Intervals up to 30 hours-- obtained from
 lactating women who receive 2 different Intramuscular injections of ketamine on two separate
 days at least 5 days apart: 0.5mg/kg and 1.0mg kg.

 Women are required to have been breast feeding for at least 3 months and be healthy and on no
 medications. Support is provided for the entire time at the site and for any at home pumping.
 During the period of ketamine's influence, subjects are reclining and with 2 Investigators.
 The initial subject's data will determine the length of time for pumping--most likely 12
 hours as ketamine and the active principle metabolite have half-lives of less than 3 hours.
 Determination of concentration of ketamine in breast milk is being done at the UCSF Clinical
 lab with quantification of metabolites that are inactive as well. This research is of benefit
 by providing lactating women information on potential exposure of infants/children to
 ketamine. It will serve as a guide as KRF conducts research on postpartum depression and for
 women at large using ketamine for psychiatric indications.
Inclusion Criteria:• Age 21-45

 -  Postpartum with established lactation for a minimum of 3 months.

 -  Ability to pump breast milk and to provide a reservoir for infant feeding prior to the
 study; or acceptance of bottle feeding by the infant.

 -  In good health-normal BP/P; afebrile-temp ascertained; review of systems by MD;
 absence of diagnosed illnesses.

 -  Not pregnant--Pregnancy tested for before each administration by urine assay.

 Exclusion Criteria:• Hypertension with a BP greater than 145/90

 -  Subjects must be off all psychiatric medications specifically; medications and
 supplements, or evaluated by the PI for non-interference

 -  No alcohol or other substances such as marijuana for 72 hours or more.

 -  Weight <50kg or > 90kg.

 -  Pregnancy