Nutmeg poisoning is indeed possible, although most common not in filthy junkies like ourselves, but rather Victorian women in the US and UK who tried to induce abortion with it. ("Victorian culture," although possibly a misnomer, was certainly international.) British medical journals covered the phenomenon, although almost as interesting as the practice is its ineffectiveness. A 1962 survey (1) noted that of all the women treated for an overdose of nutmeg, only one actually miscarried, and that was a month after she took the drug. On the other hand, if there had been uncomplicated successes, they would likely not have been reported to doctors.
1. McCord, J. A., and Jervey, L. P., "Nutmeg (myristicin) poisoning ". Jour. S. Carolina Med. Assoc., 58 (1): 436-438, 1962.