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.
National Salary Statistics. According to a 2011 salary survey conducted by Medscape, general surgeons practicing in the United States earned an average of $265,000. About 19 percent of general surgeons reported annual incomes of less than $100,000, and 15 percent of general surgeons earned between $100,000 and $200,000.