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.
What is Pristiq? Pristiq (desvenlafaxine) is an antidepressant in a group of drugs called selective serotonin and norepinephrine reuptake inhibitors (SNRIs). Desvenlafaxine affects chemicals in the brain that may be unbalanced in people with depression. Pristiq is used to treat major depressive disorder.