[chrishoney]

Some people have reported muscle cramps initially when starting PM. Cramping, along with headaches, nausea and other symptoms seems to be similar to the symptoms of estrogen dominance in women. You don't mention what dosage you are taking, but try backing off a bit, and increasing your dosage more slowly. Perhaps take a week or so at each increased level to give your system time to adjust to the new hormonal effects. Tolerance to PM and the incidence of undesirable side effects is highly variable. As we like to say, your mileage may vary.