Among the most troubling questions facing consumers as they shop for insurance under the Obama administration's new health care law is whether the plans will cover the drugs they take — and how much they will have to pay for them. But with less than two weeks remaining until enrollment opens on Oct. 1, the answers are still elusive and anxiety is growing for consumers whose well-being depends on expensive medications. States running the marketplaces where the plans will be offered have not released details about which drugs will be covered.