A nerve block relieves pain by interrupting how pain signals are sent to your brain. It is done by injecting a substance, such as alcohol or phenol, into or around a nerve or into the spine. Nerve blocks may be used for several purposes, such as: 1  To determine the source of pain.
2.5 Stars. Lo Loestrin Fe is the brand name for norethindrone acetate and ethinyl estradiol, a prescription birth control medicine that's used to prevent pregnancy. The drug contains female hormones that prevent ovulation and also causes changes in the cervical mucus and uterine lining, which makes it harder for sperm to reach the uterus and for a fertilized egg to attach to the uterus.
Megestrol is a man-made chemical similar to the female hormone progesterone. Megestrol is used to treat loss of appetite and weight loss in people with acquired immunodeficiency syndrome (AIDS). Megestrol is also used in the treatment of advanced breast cancer and endometrial cancer.Megestrol may also be used for purposes not listed in this medication guide.egestrol is used to treat loss of appetite and weight loss in people with acquired immunodeficiency syndrome (AIDS). Megestrol is also used in the treatment of advanced breast cancer and endometrial cancer.