Well from an aussie view, here is some info.
It is illegal for drug companies to advertise on television for specific medicines, such things as Asprin and Over-the-Counter medications can be advertised on television, but not medications with a pharmacological action against a specific illness (angina medications for example)
Drug companies throw their money in direct marketing to the doctors and hospitals to get their drugs on the market, and publications like drug sheet registries (called MIMS, it is THE authority on all medications in oz, their use, effects and contraindications. Its twice as thick as it should be from adverts though)
The other issue is what is called the Pharmaceutical Benefits Scheme.
http://www.hic.gov.au/yourhealth/our_services/apbs.htmThis is a scheme where the Federal Government subsidises medications by paying a large amount of the cost, the drug companies still get their money and a price is NOT set despite the amount of rubbish spouted.
We now have the ridiculous situation where drug companies are all vying to get their medications on the PBS list and the conservative government yelling down the TV at us saying not to doctor shop to get pills on the PBS (Apparently Australians love to go to several doctors and fill perscriptions and sit at home eating medications all day...duh)
We have recently had a round of talks with the US and the Free Trade Agreement that GW promised us as a reward for sending troops over (good boy Howard...now SIT!) and one diplomat made a rather large gaffe by referring to our scheme as the Pharmaceutical Protection Scheme. It highlights the US's administrations abject fear of government intervention to improves peoples living conditions.
We are a bit complacent about the cost of drugs and get very antsy if we hear any talk about removing such schemes. I understand how high medical costs are in the US and live in hope that a new government more sympathetic to your needs.