Pfizer is one of the biggest names in the pharmaceutical industry. The company is well known for developing ground-breaking products like Viagra and Zoloft. For over a decade now, sales generated by Pfizer have always exceeded $30 billion. Aside from the pharmaceutical side of the company, there are also departments like research, sales and administration that require able employees. Pfizer fills these departments up with interns. These interns get to gain first-hand experience on what it takes to handle weighty responsibilities.