Well, if you want to take an alternative product manufactured abroad under who knows what sort of quality controls, then go for it. The FDA cannot inspect foreign pharmaceutical manufacturing facilities.
Also, there is a reason why drugs cost less in other parts of the world, i.e., that their per capita income levels are vastly lower and they cannot pay higher prices. Yes, we have a higher standard of living and income levels, so we can and do pay more.
Finally, where are you getting this about a “monopoly”? There is no monopoly. Look how many domestic drug companies there are. You have Lilly, Merck, Pfizer, Bristol-Myers, Abbott, Johnson & Johnson, Allergan, Amgen, Amylin, Centocor, Forest, just to name a few.