You won't need a huge amount of cash to invest in these great pharma stocks.Share price has nothing to do with whether a stock is fairly valued. However, it is nonetheless an important consideration for investors on tight budgets. With that in mind, three Fool.com contributors have identified what they think are magnificent pharmaceutical stocks under $100 to buy right now. Here's why they picked AstraZeneca (AZN 0.31%), Novo Nordisk (NVO -0.77%), and Pfizer (PFE 0.64%). AstraZeneca is a growth beast that a ...