Dr. Lauren Feder, physician and homeopath in private practice, Beverly Hills, California on the use of homeopathy as an alternative treatment for premenstrual syndrome (PMS):

The people that I find who have the biggest complaints of PMS are often women who can be very intense. They can have complaints of pain at ovulation, often left-sided pelvic complaints, but not exclusively. PMS can start anywhere from ovulation, I'm just giving you an example of some of my patients, ovulation to a few days before their period. And once the period starts with the flow, it's like, oh, they get some relief. And that remedy would be Lachesis.

Which is?

Snake venom, potentized and diluted.

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