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 should not be used to prevent loss of appetite and severe weight loss in patients who have not yet developed this condition. Megestrol is a man-made version of the human hormone progesterone. It treats breast cancer and endometrial cancer by affecting female hormones involved in cancer growth.