IDAHO FALLS, Idaho (KIFI) — A national medication shortage is affecting some women in eastern Idaho, as estrogen patches become increasingly difficult to find for those treating menopause symptoms. Estrogen patches are part of hormone replacement therapy and are often prescribed to help manage menopause and perimenopause symptoms like joint pain, mood swings, night sweats, and hot flashes. A Surge in Demand According to local doctors, as menopau…