The “Right to Try Act”—the very first to pass in the U.S.—was signed into law by Colorado’s governor after passing the state legislature unanimously. Similar bills are coming up for approval in Arizona, Louisiana, and Missouri. Each bill would allow patients, in partnership with their physicians, to request experimental medications that are still being tested. “This is such a paradigm shift for how we approach terminally ill patients’ access to medication in this country,” says Lucy Caldwell, communications director for the conservative public policy and advocacy organization Goldwater Institute, which is behind the current bills. Nationwide, people with a terminal illness for which available treatments aren’t working can seek a Compassionate Use Exemption to be included in a clinical trial of a drug or procedure that might help them. Of the 550 requests the FDA received for such exceptions during the 2013 fiscal year, all were approved. “The FDA is strongly supportive of the appropriate use of expanded access,” says Sandy Walsh, a spokesperson for the agency. But many complain that the process is long and mired in paperwork. The new law would allow terminally ill Colorado patients to request treatments without any special exemptions or enrollment in a trial. Critics of the legislation note that the FDA approval process exists to protect patients from harm, and that true “miracle” drugs are few and far between. Colorado patients will have access to drugs that have passed “Phase 1”—known as the safety phase—of clinical trials. The treatments need not have passed subsequent tests to show whether they are effective or safe in a larger population. Some 30% of drugs that begin the approval process pass the first phase of clinical trials (which usually include a very small numbers of patients—often between 20 and 80). But only 8% ultimately win approval, and far fewer are truly lifesaving. Some critics worry that opening up unapproved drugs for use will undermine the standards and safeguards the government has put in place to keep patients from needless suffering. “The FDA has not taken a position on any particular ‘Right to Try’ bill,” says Walsh. “However, the agency is concerned with any efforts that would be inconsistent with its Congressionally mandated authority to protect the public from therapies that are not safe and effective.” In Colorado, drug companies are under no obligation to provide the drugs, and patients may have to pay for them out of pocket. “We don’t know what the level of efficacy is going to be—that’s where they’re rolling the dice,” Caldwell says of people who might request experimental drugs. But she notes that for terminally ill patients, side effects might be of little concern: “There’s a side effect that’s certain if I don’t take this drug,” she says. “And that’s death.” More: Measles Vaccine Cures Woman Of Cancer