Re : Haldol (haloperidol) The Haldol preparation is the decanoate salt which is the repository form, and slowly releases Haldol from the muscle tissue over a period of about 1 month. Doses are calculated from the daily intake and then multiplied accordingly, so that the individual gets about a months worth of Haldol in one injection. Certainly the concentration of Haldol in milk is small, but its half-life is exceedingly long. If this were a weak premature infant, I would suggest the risks are excessive. If this were a robust 12 month old infant, I wouldn't worry so much. The major problem is the published reports suggesting that strong neuroleptics (thorazine,etc) may significantly increase the risk of SIDS. Regards Tom Hale, Ph.D.