Letrozole belongs to a class of drugs known as nonsteroidal aromatase inhibitors. Letrozole decreases the amount of estrogen in the body. Because many types of breast cancer cells require estrogen to grow, this drug may slow or stop the growth of cancer cells. Letrozole is given as a tablet taken by mouth.
Earnings as a Veterinary Surgeon. The lowest-earning 10 percent of veterinarians earned below $46,610 in May 2008, and the highest-earning 10 percent earned above $143,660, according to the BLS.
The countryâs 55,410 veterinarians made an average $91,250 per year as of May 2011, according to the BLS. However, annual pay ranged from $50,480 to $141,680 per year. Veterinarians diagnose and treat pets and animals on farms, ranches, zoos, racetracks and laboratories.