During his three decades as a emergency-room doctor, Bob Uslander had never written a prescription for a lethal dose of medication. But then he shifted to geriatric and palliative care, and in 2016, a patient suffering from the neurodegenerative disease ALS wanted to use Californiaโ€™s new physician-assisted death law.

Uslander was apprehensive. Until then, heโ€™d always viewed death as a failure.

โ€œI didnโ€™t really know what it would be like to be with somebody who had made the choice and was taking this medication,โ€ he recalled recently. โ€œI didnโ€™t know if they would just gently fall asleep or if they would be gasping or struggling.โ€

His patient, a 67-year-old massage therapist with what is commonly known as Lou Gehrigโ€™s disease, also was worried โ€“ for an entirely different reason. Her health was declining fast. Breathing and swallowing were becoming harder, and she could no longer walk. Uslander remembers her being terrified about what else would happen before it all ended.

So he wrote the prescription, and when she was ready to use it, he sat beside her and watched her die.

โ€œIt was very peaceful,โ€ he said. โ€œEvery experience Iโ€™ve had with aid-in-dying since then has been similar. Thereโ€™s a sense of relief, thereโ€™s a sense of release.โ€

Although medically assisted death has gained ground in this country โ€“ with six states and the District of Columbia legalizing the practice โ€“ it remains a divisive issue among health-care providers. The American Medical Association, the nationโ€™s most prominent doctorsโ€™ group, has maintained the same guidance for the past quarter-century: โ€œPhysician-assisted suicide is fundamentally incompatible with the physicianโ€™s role as healer, would be difficult or impossible to control, and would pose serious societal risks.โ€

Yet this week in Chicago, the AMA House of Delegates will debate and vote on whether the associationโ€™s Code of Medical Ethics should be revised.

โ€œThe mere fact that theyโ€™re considering it again tells you that itโ€™s a changing climate,โ€ said Art Caplan, a professor of bioethics and head of the division of medical ethics at New York University School of Medicine. โ€œThe reality is, there are many more doctors in the AMA, but also outside the AMA, who have changed their minds about this.โ€ And opinions, he predicted, will โ€œcontinue to evolve.โ€

The AMAโ€™s Council on Ethical and Judicial Affairs spent two years reviewing resolutions, not so much on whether to support the practice but on whether to take a neutral stance. The council is recommending that the Code of Medical Ethics โ€œnot be amendedโ€ and continue to refer to โ€œphysician-assisted suicide,โ€ saying that language still โ€œdescribes the practice with the greatest precision.โ€ The delegates could accept the recommendation or send it back for further review.

Itโ€™s uncertain which way the vote will go, but in an open forum on the AMAโ€™s website, doctors, delegates and others showed strong support for the status quo. That position is increasingly at odds with public opinion, with polls showing many Americans think doctors should be allowed to help terminally ill patients end their lives.

The AMA declined to comment before the meeting.

On one side, doctors argue that physician-assisted death should be a choice for patients who are already dying and want to end their suffering on their own terms. Those on the opposing side contend that such assistance violates one of the core principles of their profession โ€“ do no harm โ€“ and could become a slippery slope to euthanasia. Thereโ€™s even disagreement about how to characterize the practice. Opponents say terms such as โ€œaid in dyingโ€ are euphemisms that obscure the harsh reality, while proponents see โ€œdoctor-assisted suicideโ€ as stigmatizing patients who choose it.

โ€œThis is not just a medical issue,โ€ said cardiologist Thomas Sullivan, an AMA delegate from Massachusetts who agrees with the recommendation for no change. โ€œThis is a social issue. This is a moral issue. This is something that many, many people are faced with from time to time, when your own parents or your own children or your brother or sister or you are faced with a terminal illness.โ€

Neurologist Lynn Parry, a delegate from Colorado, said she will vote to reject the ethics councilโ€™s stance and ask it to spend more time โ€œlooking at what protections for physicians, and particularly for patients, would need to be in placeโ€ for the AMA to amend its guidance.

โ€œHow we look at the universe is really driven by our personal belief system and, in large part, by our philosophies and religious beliefs, and thatโ€™s as it should be,โ€ she said.

Her state is among those that allow physician-assisted death. Oregon led the way with a 1994 ballot measure, followed by Washington in 2008 and then Vermont, California, Colorado, the District and Hawaii. A court case established the legality of assisted death in Montana. (Californiaโ€™s 2015 law was overturned by a judge last month, a decision that is being appealed.)

The practice drew intense national attention in fall 2014 after a terminally ill woman named Brittany Maynard moved from her home in California to Portland so she could utilize Oregonโ€™s Death with Dignity Act. The 29-year-old had been diagnosed with a stage 4 brain tumor โ€“ glioblastoma, the same aggressive cancer that Sen. John McCain, R-Ariz., is battling โ€“ and was told it would kill her within six months. She instead set her own timeline, taking a fatal dose of barbiturates that November.

Half a year later, a Gallup poll found almost seven out of 10 Americans surveyed said doctors should be allowed to assist terminally ill patients in ending their lives โ€“ a notable increase from 2014.

David Grube, a retired family physician from Oregon and national medical director for Compassion & Choices, calls the current AMA policy โ€œantiquated.โ€

โ€œ โ€˜Do no harmโ€™ leads to a lot of harm in medicine,โ€ he said, with โ€œpeople on breathing machines for months and all kinds of things.โ€ He considers the โ€œenemyโ€ to be terminal suffering, especially the cases where doctors canโ€™t ease patientsโ€™ pain. Since his state passed its law, Grube said, โ€œmore people havenโ€™t died, but fewer people have suffered.โ€

But the doctors are still debating it.

โ€œI just do not believe that in the medical profession, which at its core is about protecting the quality and quantity of life, we should become the agent by which we hand them a prescription so they can choose the exact time and moment of their death,โ€ said M. Zuhdi Jasser, an internist and primary care physician who serves as an AMA delegate from Arizona.

Jasser, who presented the resolution to maintain the term physician-assisted death, said he plans to vote for the association to hold firm.

โ€œThe big question that I think physicians are going to be dealing with over the next five, 10, 15 years as more of these states legalize it is: Are our ethical guidelines and core principles going to be determined by cultural shifts and by popular vote or populism,โ€ he said, โ€œor are they going to be things that we adhere to and hold on to regardless of the shifting winds of populistsโ€™ concerns?โ€