Generic Estrace is used for treating conditions due to menopause (eg, hot flashes; vaginal itching, burning, or dryness), treating vulval or vaginal atrophy, and preventing osteoporosis (brittle bones). It is also used for estrogen replacement therapy after failure of the ovaries and to relieve the symptoms of breast cancer.
Generic Principen is an antibiotic in the penicillin group of drugs. It is used to treat many different types of infections caused by bacteria, such as ear infections, bladder infections, pneumonia, gonorrhea, and E. coli or salmonella infection.